Abstract

Disclosed in the present application are an electric motor and an electric appliance. The electric motor comprises a stator assembly and a rotor assembly, wherein the stator assembly comprises a stator iron core provided with an inner stator hole therein; the rotor assembly is arranged in the inner stator hole, and comprises a rotor iron core and a plurality of rotor magnetic poles which are arranged on the rotor iron core in a circumferential direction of the rotor iron core and divide the rotor iron core into a plurality of iron core units; an outer contour of at least one iron core unit comprises one or more arc segments, and the stator iron core has a circular virtual inner contour; and a first gap is formed between the outer contour of the iron core unit and the virtual inner contour of the stator iron core, and the first gap located on a first side of the iron core unit is larger than the first gap located on a second side of the iron core unit, the first side being the side of the rotor assembly in a rotating direction, and the second side being the side of the rotor assembly in a reverse rotating direction.

IPC Classes  ?

• H02K 1/14 - Stator cores with salient poles
• H02K 1/276 - Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]

Abstract

Provided in the present application are a stator punching sheet, an electric motor, a fan and an electrical appliance. The stator punching sheet comprises a yoke portion and a tooth portion, wherein a first end of the tooth portion in the radial direction is connected to the yoke portion, and the tooth portion is rectangular; and a first edge is provided on the side of two sides of the yoke portion in the radial direction that is close to the tooth portion, a second edge is provided on the side of two sides of the tooth portion in the circumferential direction that is close to the first edge, and the angle between the second edge and the first edge is greater than 90 degrees.

IPC Classes  ?

• H02K 1/14 - Stator cores with salient poles
• H02K 1/16 - Stator cores with slots for windings

Abstract

A stator structure, a motor, and electrical equipment are provided. The stator structure includes a stator core that includes a stator yoke and multiple stator teeth. The stator teeth are arranged on the stator yoke. A stator slot is formed between two adjacent stator teeth. Each stator tooth includes a tooth body and a tooth boot. The tooth body is arranged on the stator yoke. The tooth boot is arranged on the tooth body. The stator structure further includes a winding arranged on the stator teeth. The winding includes flat wires wound on the stator teeth in a concentrated manner. The flat wires is wound on the stator teeth in multiple layers. The number of flat wires in the layer of the winding away from the stator teeth is not more than the number of flat wires in the layer of the winding close to the stator teeth.

IPC Classes  ?

• H02K 3/18 - Windings for salient poles
• H02K 1/14 - Stator cores with salient poles
• H02K 3/32 - Windings characterised by the shape, form or construction of the insulation

Abstract

A stator lamination, a stator structure, a motor structure, and a laundry treatment apparatus are provided. The stator lamination includes a stator yoke and multiple stator teeth arranged on the stator yoke, and tooth shoes arranged on the ends of the stator teeth distant from the stator yoke. The stator teeth are circumferentially distributed around the axis of the stator lamination. A winding groove is formed between two adjacent stator teeth. A first notch and a second notch, arranged in the radial direction of the stator teeth, are formed between two adjacent tooth shoes. The notch width of the first notch is different from that of the second notch.

IPC Classes  ?

• H02K 1/16 - Stator cores with slots for windings
• H02K 1/276 - Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
• H02K 21/14 - Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures

Abstract

A rotor structure, an electric motor structure and a clothing treating device are provided. The rotor structure includes a rotor iron core, a permanent magnet and a magnetic barrier. The rotor iron core includes rotor punching sheets arranged in a stacked manner. Permanent magnet slots are provided in the rotor iron core and the permanent magnet is disposed in the permanent magnet slots. The rotor structure rotates in one direction or two directions in a circumferential direction. In the rotation direction of the rotor structure, the magnetic barrier is provided on at least one side of the permanent magnet slot, and two ends of the magnetic barrier face an outer edge of the permanent magnet and an outer edge of the rotor iron core, respectively. The magnetic barrier is provided on a first punching sheet or a second punching sheet of the rotor punching sheets.

IPC Classes  ?

• H02K 1/276 - Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
• H02K 1/16 - Stator cores with slots for windings

Abstract

Provided in the present application are a rotor assembly, an electric motor, an electrical appliance, and a vehicle. The rotor assembly is used for the electric motor; the electric motor comprises a stator assembly; and the rotor assembly is sleeved on an outer side of the stator assembly, and comprises a plurality of iron core blocks and a plurality of magnetic assemblies. The plurality of iron core blocks are arranged in a circumferential direction; and the plurality of magnetic assemblies are arranged in the circumferential direction, and each of the plurality of magnetic assemblies comprises at least three magnetic members, at least one of the at least three magnetic members being arranged on the inner periphery of the plurality of iron core blocks, and at least two of the magnetic members being arranged between two adjacent iron core blocks of the plurality of iron core blocks.

IPC Classes  ?

• H02K 1/2791 - Surface mounted magnets; Inset magnets

Abstract

Provided in the present application are an end cover, an electric motor and a vehicle. The end cover is used for the electric motor. The electric motor comprises a stator assembly and a rotor assembly, wherein the rotor assembly is sleeved on the outer side of the stator assembly. The end cover comprises a body and a blade assembly, wherein the body can rotate along with the rotor assembly; and the blade assembly is arranged on a first side of the body facing the rotor assembly, and the blade assembly comprises a plurality of blades, the plurality of blades being arranged in the circumferential direction of the body.

IPC Classes  ?

• H02K 1/20 - Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium

Abstract

A rotor structure, a motor structure, and a laundry treatment device are provided. The rotor structure has a rotor iron core, multiple permanent magnets and multiple magnetic barriers. The rotor has multiple permanent magnet slots arranged along a circumferential direction of the rotor core. The permanent magnets are disposed in the permanent magnet slots respectively. The magnetic barriers are disposed on the rotor iron core. The rotor structure can rotate unidirectionally or bidirectionally in the circumferential direction. At least one side of a permanent magnet slot is provided with the magnetic barriers in the rotation direction of the rotor structure. Two ends of each magnetic barrier face towards the permanent magnet corresponding to the permanent magnet slot and towards the outer edge of the rotor core, respectively.

IPC Classes  ?

• H02K 1/276 - Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]

Abstract

The present application provides a stator assembly, a motor and a servo system. The stator assembly comprises a stator core, a plurality of first coils, a plurality of second coils and a manifold plate; the stator core comprises a yoke and a plurality of stator teeth, the plurality of stator teeth are distributed in the circumferential direction of the yoke, and a winding groove is formed between adjacent stator teeth of the plurality of stator teeth; the plurality of first coils are embedded in the winding grooves; and the plurality of second coils are embedded in the winding grooves; the manifold plate comprises a plurality of first wire receiving parts, and the plurality of first wire receiving parts are respectively connected to the plurality of first coils and to the plurality of second coils, enabling the plurality of second coils to be in delta connection, and the plurality of first coils to be in wye connection with the plurality of second coils. In the stator assembly provided in the present application, the plurality of first coils and the plurality of second coils form a combination of delta and wye connections, improving the winding coefficient, simultaneously reducing low-order magnetic potential harmonics, further improving the power density of the motor and improving torque ripple.

IPC Classes  ?

• H02K 3/28 - Layout of windings or of connections between windings
• H02K 3/12 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
• H02K 1/14 - Stator cores with salient poles
• H02K 1/16 - Stator cores with slots for windings

Abstract

Provided in the present application are a stator assembly, an electric motor, and a servo system. The stator assembly comprises a stator iron core, a plurality of first coils, and a plurality of second coils, wherein the stator iron core comprises a yoke iron core and a teeth iron core, the teeth iron core being connected to the yoke iron core; the teeth iron core comprises a plurality of first punching sheets, which are arranged in an axial direction, and each of which comprises a plurality of first teeth arranged in a circumferential direction of the yoke iron core, the adjacent first teeth in the plurality of first teeth defining a first closed wire slot with the yoke iron core; the plurality of first coils are wound around the stator iron core; the plurality of second coils are wound around the stator iron core and alternately arranged with the plurality of first coils; and the plurality of second coils are in angular connection with each other, and the plurality of first coils are in star connection with the plurality of second coils.

IPC Classes  ?

• H02K 1/14 - Stator cores with salient poles
• H02K 1/16 - Stator cores with slots for windings
• H02K 3/28 - Layout of windings or of connections between windings
• H02K 3/52 - Fastening salient pole windings or connections thereto

Abstract

A fan and an electrical appliance. The fan comprises a stator assembly (100), an electrical control component (200), an air duct assembly (300), and a connecting member (400); the stator assembly (100) comprises a stator core (110) and a frame (120), and the frame (120) is provided outside the stator core (110); the electrical control component (200) is provided on a first side of the stator assembly (100) in the axial direction; the air duct assembly (300) is provided on the side of the stator assembly (100) away from the electrical control component (200); the connecting member (400) penetrates through the electrical control component (200), the stator assembly (100), and the air duct assembly (300); a first positioning portion (130) is provided on the side of the frame (120) close to the electrical control component (200), the electrical control component (200) is provided with a second positioning portion (210), and the second positioning portion (210) works in conjunction with the first positioning portion (130). A first side of the frame (120) of the fan faces the electrical control component (200), the first side of the frame (120) is provided with the first positioning portion (130), the electrical control component (200) is provided with the second positioning portion (210), and the first positioning portion (130) works in conjunction with the second positioning portion (210), so as to implement positioning of the electrical control component (200), thereby simplifying the structure required for positioning the electrical control component (200), reducing the number of fan parts, and thus reducing the weight of the fan.

IPC Classes  ?

• F04D 29/40 - Casings; Connections for working fluid
• F04D 27/00 - Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
• F04D 25/06 - Units comprising pumps and their driving means the pump being electrically driven
• F04D 29/60 - Mounting; Assembling; Disassembling

Abstract

The present application provides a rotor assembly and an electric motor. The rotor assembly comprises a first rotor core, a plurality of first permanent magnets, and a plurality of second permanent magnets, wherein the first rotor core comprises a first core body, a plurality of first slots, a plurality of second slots, and first flux barriers; the plurality of first slots and the plurality of second slots are alternately arranged in the circumferential direction of the first core body; the plurality of first slots respectively extend to gaps between two adjacent second slots among the plurality of second slots; the first flux barriers are arranged between first slots and second slots, which are adjacent to each other, among the plurality of first slots and the plurality of second slots; the plurality of first permanent magnets are respectively arranged in the plurality of first slots; and the plurality of second permanent magnets are respectively arranged in the plurality of second slots.

IPC Classes  ?

• H02K 1/276 - Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
• H02K 1/22 - Rotating parts of the magnetic circuit

Abstract

Motor rotor position observation methods and devices, a rotor position observer and a medium. A method comprises: when a high-frequency pulse is injected into the d-axis of a motor, determining six comparison values of three-way modulation (S101); according to comparison value Act22, determining first and second current sampling trigger values (S102); controlling the motor according to the six comparison values, sampling the current of the motor according to the first and second current sampling trigger values to acquire first and second sampled currents, and determining a q-axis current of the motor according to the first and second sampled currents (S103); according to the second current sampling trigger value and comparison value Act12, determining an effective voltage vector which acts after triggering of the second current sampling trigger value (S104); and compensating for the q-axis current according to the effective voltage vector, and estimating the rotor position of the motor according to the compensated q-axis current (S105).

IPC Classes  ?

• H02P 21/14 - Estimation or adaptation of machine parameters, e.g. flux, current or voltage
• H02P 21/18 - Estimation of position or speed
• H02P 21/22 - Current control, e.g. using a current control loop
• H02P 21/24 - Vector control not involving the use of rotor position or rotor speed sensors

Abstract

NewNewNew (S103); controlling the motor according to the adjusted six comparison values, and performing current sampling on the motor according to the first current sampling trigger value and the second current sampling trigger value to obtain a first sampling current and a second sampling current (S104); and estimating a rotor position of the motor according to the first sampling current and the second sampling current (S105).

IPC Classes  ?

• H02P 21/14 - Estimation or adaptation of machine parameters, e.g. flux, current or voltage

Abstract

A rotor (100) of an electric motor (1000), and the electric motor (1000). The rotor (100) comprises a rotor iron core (10) and a plurality of permanent magnet groups (20), the plurality of permanent magnet groups (20) being mounted on the rotor iron core (10) and distributed in a circumferential direction of the rotor iron core (10), and each permanent magnet group (20) comprising an outer permanent magnet (21) and an inner permanent magnet (22) which are connected in series in a magnetic circuit, wherein in a radial direction of the rotor iron core (10), the inner permanent magnet (22) is located on the side of the corresponding outer permanent magnet (21) that is close to the axis of the stator iron core (10); the coercive force of the outer permanent magnet (21) is greater than that of the inner permanent magnet (22); and the inner permanent magnet (22) is a cerium-containing neodymium-iron-boron permanent magnet and/or a heavy-rare-earth-free neodymium-iron-boron permanent magnet.

IPC Classes  ?

• H02K 1/276 - Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]

Abstract

Provided in the present application are a stator structure, an electric motor and an electrical device. The stator structure comprises: a stator yoke portion; and at least two stator teeth which are arranged on the stator yoke portion, wherein a notch is formed between tooth tops of every two adjacent stator teeth, at least some of the stator teeth comprise at least two auxiliary teeth, a groove is formed between every two adjacent auxiliary teeth on the same stator tooth, and in a circumferential direction of the stator structure, the width of the groove is unequal to the width of the notch. By means of the stator structure provided in the present application, the size of the groove between every two adjacent auxiliary teeth and the size of the notch between every two adjacent stator teeth are set to be unequal, the degree of uniformity of the distribution of the auxiliary teeth on all the stator teeth in the circumferential direction can be changed, the period number of air gap magnetic conductance is reduced, and the magnetic density harmonic component is increased, so that the output torque of the electric motor is further improved.

IPC Classes  ?

• H02K 1/14 - Stator cores with salient poles
• H02K 3/52 - Fastening salient pole windings or connections thereto
• H02K 3/28 - Layout of windings or of connections between windings
• H02K 1/27915 - Magnets shaped to vary the mechanical air gap between the magnets and the stator
• H02K 1/2788 - Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of a single magnet or two or more axially juxtaposed single magnets

Abstract

The present application provides a stator assembly, a motor, and an electrical device. The stator assembly comprises: stator main teeth, wherein each stator main tooth comprises a tooth body and a tooth shoe, the tooth shoe is connected to one end of the tooth body, at least two auxiliary teeth are provided at the end of the tooth shoe furthest from the tooth body, and slots are each formed between two adjacent auxiliary teeth; and permanent magnets provided in the slots. According to the stator assembly provided by the present application, a permanent magnet is provided in a slot between adjacent auxiliary teeth, so that a magnetic flux density harmonic component generated by the modulation between the stator assembly and a rotor assembly is further increased, more working harmonics are generated, and an output torque of the motor is further improved.

IPC Classes  ?

• H02K 1/14 - Stator cores with salient poles
• H02K 1/16 - Stator cores with slots for windings
• H02K 3/04 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
• H02K 3/12 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots

Abstract

The present application provides a stator assembly, a motor, and an electrical appliance. The stator assembly comprises: a first stator comprising a first yoke part and at least two first teeth, wherein the at least two first teeth are arranged on the outer wall of the first yoke part, a first stator slot is formed between every two adjacent first teeth, a plurality of first slots are provided on the outer wall of the first stator, and the plurality of first slots at least comprise first stator slots; and a second stator comprising a second yoke part and at least two second teeth. The second yoke part is coaxially arranged with the first yoke part and sleeved outside the first yoke part; the at least two second teeth are arranged on the inner wall of the second yoke part; a rotor assembly is placed between the first stator and the second stator; the first stator slot has a slot center line in the radial direction of the first stator; each second tooth has a tooth body center line in the radial direction of the second stator; an angle between the slot center line and the tooth body center line is greater than or equal to 0 degree and less than or equal to 72/Ns degrees in the rotating direction of a rotor, Ns being the number of first slots.

IPC Classes  ?

• H02K 1/14 - Stator cores with salient poles
• H02K 1/16 - Stator cores with slots for windings
• H02K 3/04 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
• H02K 3/12 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
• H02K 3/28 - Layout of windings or of connections between windings
• H02K 3/52 - Fastening salient pole windings or connections thereto
• H02K 1/27915 - Magnets shaped to vary the mechanical air gap between the magnets and the stator
• H02K 16/04 - Machines with one rotor and two stators

Abstract

Provided in the present application are a prefabricated rotor punching sheet, a rotor assembly, an electric motor and an electrical device. The prefabricated rotor punching sheet comprises: a strip-shaped punching sheet, wherein the strip-shaped punching sheet comprises at least two magnetically conductive portions arranged at intervals in the lengthwise direction of the strip-shaped punching sheet; and connecting portions that are connected between every two adjacent magnetically conductive portions, wherein the magnetically conductive portions and the connecting portions are alternately distributed in the lengthwise direction of the strip-shaped punching sheet. According to the present application, the costs of a prefabricated rotor punching sheet and an electric motor using the prefabricated rotor punching sheet can be reduced, thereby ensuring that an outer circle of a rotor iron core formed by the prefabricated rotor punching sheet is more regular, and that an air gap between a rotor assembly and a stator assembly is uniform, thus preventing the phenomenon of aggravation of vibration noise of the electric motor.

IPC Classes  ?

• H02K 1/276 - Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
• H02K 1/28 - Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
• H02K 3/28 - Layout of windings or of connections between windings
• H02K 1/14 - Stator cores with salient poles
• H02K 1/16 - Stator cores with slots for windings
• H02K 3/52 - Fastening salient pole windings or connections thereto
• H02K 3/12 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
• H02K 3/48 - Fastening of windings on the stator or rotor structure in slots
• H02K 5/24 - Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations

Abstract

The present application provides a rotor assembly, a motor, and electrical equipment. The rotor assembly comprises: a magnetically conductive hub frame, the magnetically conductive hub frame comprising an end cover portion and an annular yoke portion, the end cover portion being connected to the axial end of the annular yoke portion, and the inner peripheral wall of the annular yoke portion being provided with a plurality of accommodating portions, the plurality of accommodating portions being distributed along the circumferential direction of the annular yoke portion; and a plurality of permanent magnets respectively disposed in the plurality of accommodating portions, and the polarities of the plurality of permanent magnets being the same. By means of the rotor assembly of the present application, the annular yoke portion and the end cover portion connected to the axial end of the annular yoke portion are provided, thereby improving the overall structural strength of the magnetically conductive hub frame; the inner peripheral wall of the annular yoke portion is provided with the plurality of accommodating portions, and the plurality of permanent magnets having the same polarity are disposed in the plurality of accommodating portions, so as to produce a consequent-pole magnetic structure on the annular yoke portion, thereby reducing the number of permanent magnets used, reducing the manufacturing difficulty of a consequent-pole rotor, enhancing the magnetic field modulation effect, and increasing the amplitude of a working magnetic order flux density harmonic.

IPC Classes  ?

• H02K 1/30 - Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
• H02K 1/27915 - Magnets shaped to vary the mechanical air gap between the magnets and the stator
• H02K 1/14 - Stator cores with salient poles
• H02K 1/16 - Stator cores with slots for windings
• H02K 3/52 - Fastening salient pole windings or connections thereto

Abstract

The present application provides a stator assembly, a motor, and an electrical equipment. The motor comprises: a stator assembly comprising a stator core and a stator winding, wherein the stator core comprises: a stator yoke portion; stator main teeth provided on the stator yoke portion and comprising tooth shoes, the stator winding being disposed on the stator main teeth; and at least two stator auxiliary teeth provided on the tooth shoes; and a rotor assembly comprising a plurality of permanent magnet poles, the adjacent permanent magnet poles having different polarities. The number Ps of pole pairs of the stator winding satisfies that Ps=|ax±Pr|, wherein a represents the number of the stator main teeth, x represents the number of the stator auxiliary teeth on each stator main tooth, and Pr represents the number of the pole pairs of the plurality of permanent magnet poles. In the motor provided by the present application, the stator auxiliary teeth can serve as modulation components, and new harmonic components appearing in the air gap flux density can serve as working harmonics of the motor to provide an output torque for the motor, thereby effectively increasing the torque density of the motor.

IPC Classes  ?

• H02K 1/14 - Stator cores with salient poles
• H02K 1/16 - Stator cores with slots for windings
• H02K 3/04 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
• H02K 3/12 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
• H02K 3/28 - Layout of windings or of connections between windings
• H02K 3/34 - Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
• H02K 1/27915 - Magnets shaped to vary the mechanical air gap between the magnets and the stator

Abstract

Provided in the present application are a stator structure (200), an electric motor (100) and an electrical device. The electric motor (100) comprises: a first stator (110), the first stator (110) comprising a first stator yoke (112) and first stator teeth (114), and the first stator teeth (114) being arranged on the first stator yoke (112); a rotor (130) sleeved on an outer side of the first stator (110); a second stator (140) sleeved on an outer side of the rotor (130), the second stator (140) comprising a second stator yoke (142) and second stator teeth (144), and the second stator teeth (144) being arranged on the second stator yoke (142); and a winding (166) arranged on the first stator yoke (112) and/or the second stator yoke (142). According to the electric motor (100) provided in the present application, the winding (166) is wound around the first stator yoke (112) or the second stator yoke (142) in a yoke winding manner, or windings (166) are wound around both the first stator yoke (112) and the second stator yoke (142), so that the end of the winding (166) is shortened, thereby effectively balancing the contradiction between an over-long end of the winding (166) and a high winding factor of the electric motor (100); and the winding of the winding (166) around the first stator yoke (112) and/or the second stator yoke (142) is obviously simpler, thereby reducing the production difficulty of the electric motor (100), and improving the production efficiency.

IPC Classes  ?

• H02K 1/14 - Stator cores with salient poles
• H02K 1/16 - Stator cores with slots for windings
• H02K 16/04 - Machines with one rotor and two stators
• H02K 3/28 - Layout of windings or of connections between windings
• H02K 3/52 - Fastening salient pole windings or connections thereto
• H02K 1/276 - Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
• H02K 1/279 - Magnets embedded in the magnetic core
• H02K 3/12 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
• H02K 1/28 - Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures

Abstract

A stator structure (100), a motor, and electrical equipment. The stator structure comprises: a stator core (110) comprising a stator yoke (112) and a plurality of stator teeth (114), the plurality of stator teeth being arranged on the stator yoke, a stator slot (120) being formed between adjacent stator teeth, each stator tooth comprising a tooth body (116) and a tooth boot (118), the tooth body being arranged on the stator yoke, and the tooth boot being arranged on the tooth body; and a winding (130) arranged on the stator teeth, the winding comprising flat wires (132) wound on the stator teeth in a concentrated manner, the flat wires being wound on the stator teeth in multiple layers, and the number of flat wires in the layer of the winding away from the stator teeth being not more than the number of flat wires in the layer of the winding close to the stator teeth, wherein the width of the side of the tooth body close to the tooth boot is 2×t1, the width of the side of the tooth body close to the stator yoke is 2×t2, and 1.5×t1≥t2≥t1. The use of a concentrated winding mode facilitates automatic winding of the flat wires, and the setting of the size of the stator teeth improves the slot fill factor of the flat wires, and therefore, both the economic cost and the motor performance are considered.

IPC Classes  ?

• H02K 1/14 - Stator cores with salient poles
• H02K 1/16 - Stator cores with slots for windings
• H02K 3/12 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
• H02K 3/28 - Layout of windings or of connections between windings
• H02K 3/52 - Fastening salient pole windings or connections thereto
• H02K 3/34 - Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation

Abstract

A field weakening control method and apparatus for a motor, a motor controller, a motor control system, and a medium. The method comprises: acquiring a direct current bus voltage, and determining the phase of an alternating current input voltage; determining a maximum value and a minimum value of the direct current bus voltage according to the direct current bus voltage, and determining an average value of the direct current bus voltage according to the maximum value and the minimum value; determining a field weakening average current according to a reference voltage amplitude for controlling the motor and the average value, and determining a field weakening compensation current according to the field weakening average current, a limiting value of a reference current for controlling the motor, the maximum value, the minimum value, and the phase of the alternating current input voltage; and performing field weakening control on the motor according to the field weakening average current and the field weakening compensation current.

IPC Classes  ?

• H02P 21/14 - Estimation or adaptation of machine parameters, e.g. flux, current or voltage
• H02P 21/22 - Current control, e.g. using a current control loop
• H02P 25/022 - Synchronous motors

Abstract

The present application provides a stator core, a stator, a motor, a compressor, and an air conditioner. The stator core comprises: a plurality of block stators which can be combined to form the stator core. Any block stator comprises: a yoke part; a tooth part, connected to the yoke part; a first tooth shoe, connected to the tooth part; a second tooth shoe, connected to the side of the tooth part away from the first tooth shoe, the first tooth shoe and the second tooth shoe being arranged on the side of the tooth part away from the yoke part, the second tooth shoe comprising a first surface facing a rotor, and in a rotating direction of the rotor, the first tooth shoe passing by the rotor earlier than the second tooth shoe; and a notch, formed on the side of the second tooth shoe away from the first surface. The notch is formed on the side of the second tooth shoe away from the first surface, so that an air gap magnetic field saturation phenomenon at the second tooth shoe is reduced to a certain extent, the torque fluctuation of the motor is reduced to a great extent, multi-vibration noise generated in the operation process of the motor is reduced, and the performance of the motor is further improved.

IPC Classes  ?

• H02K 1/14 - Stator cores with salient poles

Abstract

The present application provides a motor control method and apparatus, a control system, and a readable storage medium. The motor is used for driving a movable structure to move towards a target position. The method comprises: during movement of the movable structure, obtaining the distance between the position of the movable structure and the target position; adjusting control parameters of a control system of the motor when the distance is less than or equal to a preset threshold; and controlling operation of the motor according to the adjusted control parameters, to reduce the movement speed of the movable structure. According to the embodiments of the present application, the movable structure can be ensured to stop smoothly at the target position, the impact of changes in system damping on the control performance due to long-term use is reduced, and the movable structure can be prevented from oscillating back and forth at the target position.

IPC Classes  ?

• H02P 23/04 - Arrangements or methods for the control of AC motors characterised by a control method other than vector control specially adapted for damping motor oscillations, e.g. for reducing hunting
• H02P 23/20 - Controlling the acceleration or deceleration

Abstract

The present application provides a motor control method, a control device, a control system and a readable storage medium. The motor is connected to a movable structure by means of a transmission device to drive the movable structure to move. The control method comprises: obtaining a shaft torque of a motor and an electromagnetic torque of the motor; determining a disturbance torque of the motor on the basis of the shaft torque and the electromagnetic torque, wherein the disturbance torque is generated by the oscillation caused by the transmission device; compensating for an instruction current of the motor according to the disturbance torque; and controlling the motor according to the compensated instruction current. By means of the technical solution of the present application, the problem of oscillation of the movable structure control caused by the backlash of the transmission device is reduced, the influence on the movement time of the movable structure is reduced, and the impact on the transmission device is reduced, so as to avoid shortening the service life of the transmission device.

IPC Classes  ?

• H02P 6/10 - Arrangements for controlling torque ripple, e.g. providing reduced torque ripple
• H02P 6/28 - Arrangements for controlling current
• H02P 6/17 - Circuit arrangements for detecting position and for generating speed information
• H02K 7/116 - Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears

Abstract

Provided in the embodiments of the present application are a rotor structure, an electric motor structure, and an electronic device. The rotor structure comprises: a rotor core comprising a first core segment and a second core segment; and a rotor shaft, which is arranged on the rotor core in a penetrating manner, and around which the rotor core can rotate, wherein each rotor punching sheet is provided with a plurality of permanent magnet slots which penetrate two end surfaces of the rotor core in an axial direction of the rotor core; a tooth protrusion portion is provided between two adjacent permanent magnet slots in a circumferential direction of the rotor punching sheet; and on the projections of the end surfaces of the rotor core, all the rotor punching sheets in the first core segment have the same outer contour, all the rotor punching sheets in the second core segment have the same outer contour, and the projection contour lines of the tooth protrusion portions in the first core segment do not coincide with projection contour lines of the tooth protrusion portions in the second core segment. In the technical solution of the present application, although the rotor core is arranged in segments, the permanent magnets do not need to be arranged in segments, which can reduce the manufacturing cost of a skewed pole rotor, and can also improve the production efficiency.

IPC Classes  ?

• H02K 1/27 - Rotor cores with permanent magnets
• H02K 1/24 - Rotor cores with salient poles
• H02K 1/28 - Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
• H02K 1/14 - Stator cores with salient poles
• H02K 1/16 - Stator cores with slots for windings
• H02K 3/28 - Layout of windings or of connections between windings
• H02K 3/12 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
• H02K 3/48 - Fastening of windings on the stator or rotor structure in slots

Abstract

Provided in the embodiments of the present application are a stator core, an electric motor structure, and a laundry treatment device. The stator core comprises a plurality of stator punching sheets, which are arranged in a stacked manner. Each stator punching sheet comprises a stator yoke and a plurality of stator teeth arranged on the stator yoke, wherein the plurality of stator teeth are circumferentially distributed around an axis of the stator core, and a winding slot is formed between two adjacent stator teeth; and the widths of slot openings of the winding slots of at least two stator punching sheets are different. In the technical solution of the present application, among a plurality of stator punching sheets which constitute a stator core, there are both stator punching sheets with large slot openings and stator punching sheets with small slot openings, such that under the action of the stator punching sheets with at least two types of widths of slot openings, the noise generated during a use process of an electric motor may be reduced, and a slot space factor may also be improved.

IPC Classes  ?

• H02K 1/14 - Stator cores with salient poles
• H02K 1/16 - Stator cores with slots for windings
• H02K 3/28 - Layout of windings or of connections between windings
• H02K 3/12 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots

Abstract

Embodiments of the present application provide a stator lamination, a stator structure, a motor structure, and a laundry treatment apparatus. The stator lamination comprises: a stator yoke and a plurality of stator teeth arranged on the stator yoke, the plurality of stator teeth being circumferentially distributed around the axis of the stator lamination, and a winding groove being formed between two adjacent stator teeth; and tooth shoes arranged on the ends of the stator teeth distant from the stator yoke, wherein a first notch and a second notch arranged in the radial direction of the stator teeth are formed between two adjacent tooth shoes, and the notch width of the first notch is different from that of the second notch. In the technical solution of the present application, a plurality of notches having different notch widths are directly formed in one stator lamination, so that the two aspects of noise and slot fullness rate can be both taken into account, and the product competitiveness of the motor can be effectively improved.

IPC Classes  ?

• H02K 1/14 - Stator cores with salient poles
• H02K 1/16 - Stator cores with slots for windings
• H02K 3/28 - Layout of windings or of connections between windings
• H02K 3/12 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
• H02K 3/48 - Fastening of windings on the stator or rotor structure in slots
• H02K 1/27 - Rotor cores with permanent magnets

Abstract

An encoder, comprising a stator assembly (1) and a rotor assembly (2), wherein the stator assembly (1) comprises a mounting plate (11) and a circuit board (12) mounted on one side surface of the mounting plate (11), the circuit board (12) being provided with a plurality of magnetic sensors (13) distributed in a circumferential direction; the rotor assembly (2) comprises a rotor disk (21) coaxially arranged with the mounting plate (11), the rotor disk (21) being located on one side of the mounting plate (11) in an axial direction, the rotor disk (21) being rotatable relative to the mounting plate (11), and the rotor disk (21) being provided with a plurality of magnetic pole portions (21a) distributed in the circumferential direction corresponding to a side surface of the circuit board (12); and the plurality of magnetic sensors (13) are used to sense changes in a magnetic field in order to generate sensing signals. Further disclosed is a servo system having the encoder.

IPC Classes  ?

• G01D 5/244 - Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means generating pulses or pulse trains

Abstract

An encoder, a position compensation method and apparatus for the axial runout thereof, and a storage medium. The encoder (100) comprises a stator disk (2) and a rotor disk (1) that rotates relative to the stator disk (2). The rotor disk (1) and the stator disk (2) define a plurality of decoding regions. The rotor disk (1) generates a magnetic field during the rotational stroke thereof such that the stator disk (2) detects each of the decoding regions in sequence, the plurality of decoding regions comprising a first decoding region. The position compensation method for the axial runout of the encoder (100) comprises the steps of: obtaining two pieces of first actual position information of the rotor disk (1) on the first decoding area; and calculating target position information of the rotor disk (1) according to the two pieces of first actual position information.

IPC Classes  ?

• G01D 5/244 - Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means generating pulses or pulse trains
• G01D 18/00 - Testing or calibrating apparatus or arrangements provided for in groups

Abstract

A magnetic encoder (100), the magnetic encoder (100) comprising a rotor disk (1). In the magnetic encoder (100), multiple target zero point positions (12a) having a magnetic density of zero are provided along the circumferential direction of the rotor disk (1). Multiple magnetic pole portions (11) distributed along the circumferential direction are provided on the rotor disk (1), at least a portion of the magnetic pole portions (11) being different in size. For two adjacent magnetic pole portions (11), a magnetic pole neutral surface (13a) between the two magnetic pole portions (11) and/or opposite end faces of the two magnetic pole portions (11) deviate from a corresponding target zero point position (12a), such that an actual zero position of the magnetic field formed by the magnetic pole portions (11) corresponds to a target zero point position (12a).

IPC Classes  ?

• G01D 5/244 - Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means generating pulses or pulse trains

Abstract

The present application discloses an encoder and a position compensation method and apparatus therefor, and a storage medium. The position compensation method for the encoder comprises: obtaining first decoding information of the encoder in a first decoding area; calculating theoretical detection information of a stator disc in a second decoding area according to the first decoding information; obtaining second position information of a rotor disc in the second decoding area and second detection information of the stator disc in the second decoding area; calculating error information according to the theoretical detection information and the second detection information; and compensating the second position information according to the error information to obtain target position information.

IPC Classes  ?

• G01D 5/12 - Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means

Abstract

Provided in the embodiments of the present application are a rotor structure, an electric motor structure, and a clothing treating device. The rotor structure comprises: a rotor iron core, a plurality of permanent magnet slots being provided in the rotor iron core, and the rotor iron core comprising a plurality of rotor punching sheets arranged in a stacked manner; a permanent magnet, disposed in the permanent magnet slot; and a magnetic barrier, the rotor structure being capable of rotating in one direction or rotating in two directions in a circumferential direction, and in the rotation direction of the rotor structure, the magnetic barrier being provided on at least one side of the permanent magnet slot, and two ends of the magnetic barrier facing an outer edge of the permanent magnet and an outer edge of the rotor iron core respectively, wherein the plurality of rotor punching sheets comprises at least one first punching sheet and at least one second punching sheet, and the magnetic barrier is provided on the first punching sheet or the second punching sheet. In the technical solution of the present application, the magnetic barrier is selectively provided on the first punching sheet or the second punching sheet, and under the action of the punching sheet without the magnetic barrier, some non-magnetically conductive materials that may hinder the normal processing of the rotor iron core are isolated, thereby reducing the possibility of the non-magnetically conductive materials entering the magnetic barrier.

IPC Classes  ?

• H02K 1/27 - Rotor cores with permanent magnets

Abstract

Provided in the present application are an electric motor, a fan comprising the electric motor, and a household appliance. The electric motor comprises a housing, a rotating shaft assembly, a rotor assembly and a stator assembly, wherein the housing is provided with a front end and a rear end, which are opposite each other; the rotating shaft assembly comprises a first rotating shaft, a second rotating shaft and a first bearing, the first rotating shaft being hollow, the first rotating shaft being sleeved on the outer side of the second rotating shaft, and the first bearing being arranged between the inner circumference of the first rotating shaft and the outer circumference of the second rotating shaft; the rotor assembly is arranged inside the housing, and the rotor assembly comprises a first rotor and a second rotor, the first rotor and the second rotor being respectively correspondingly sleeved on the first rotating shaft and the second rotating shaft; and the stator assembly is fixed inside the housing, and the stator assembly comprises a first stator and a second stator, the first stator and the second stator being respectively correspondingly sleeved on the outer sides of the first rotor and the second rotor.

IPC Classes  ?

• H02K 16/00 - Machines with more than one rotor or stator
• H02K 1/22 - Rotating parts of the magnetic circuit
• H02K 5/16 - Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
• H02K 5/04 - Casings or enclosures characterised by the shape, form or construction thereof
• F04D 25/08 - Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation

Abstract

12312322) and is arranged between the first rotating shaft (10a) and the second rotating shaft (10b). The shaft system structure provides stable support, is easy to install, has a small axial size and has a low manufacturing cost.

IPC Classes  ?

• F16C 3/02 - Shafts; Axles
• F16C 35/08 - Rigid support of bearing units; Housings, e.g. caps, covers for spindles
• H02K 1/22 - Rotating parts of the magnetic circuit
• H02K 5/16 - Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields

Abstract

Embodiments of the present application provide a rotor structure, a motor structure, and a laundry treatment device. The rotor structure comprises: a rotor iron core, a plurality of permanent magnet slots being provided on the rotor iron core, and the plurality of permanent magnet slots being provided in the circumferential direction of the rotor iron core; permanent magnets disposed in the permanent magnet slots; and magnetic barriers disposed on the rotor iron core, the rotor structure being capable of unidirectional rotation or bidirectional rotation in the circumferential direction, at least one side of each permanent magnet slot being provided with a magnetic barrier in the rotation direction of the rotor structure, and two ends of each magnetic barrier respectively facing the permanent magnet and the outer edge of the rotor iron core. In the technical solution of the present application, on the one hand, while suppressing the quadrature axis armature reaction of the motor, relieving the degree of magnetic saturation and reducing the load counter-electromotive force, and improving the torque density and overload capacity of the motor, the positions of the magnetic barriers can be configured according to the limit of the rotation direction of the rotor structure; on the other hand, the rotor iron core is hollowed to provide magnetic barriers, and thus, the amount of rare earth permanent magnets can also be reduced.

IPC Classes  ?

• H02K 1/27 - Rotor cores with permanent magnets
• H02K 29/03 - Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems

Abstract

A motor, a compressor, and a fan. The motor (8) comprises a rotor core (4), rotor slots, and a stator core (1). The rotor slots are arranged through the rotor core (4), and the rotor slots are inclined with respect to the axial direction. The stator core (1) is disposed on one side of the rotor core (4). The stator core (1) comprises stator teeth (10) facing the rotor core (4), air gaps (13) are provided between the stator teeth (10) and the rotor core (4), and at least some of the air gap (13) are not equal. Inclined rotor slots are provided on the rotor core, and air gaps that are not completely equal or completely unequal are formed between the stator teeth and the rotor core, so as to satisfy the requirements of reducing the low-speed harmonic torque fluctuation and improving the output performance of the motor, so that the starting additional torque and rated performance of the motor can be matched with each other.

IPC Classes  ?

• H02K 1/26 - Rotor cores with slots for windings
• H02K 1/14 - Stator cores with salient poles

Abstract

A control apparatus and a laundry treating apparatus. The control apparatus is used for controlling a motor (900). The control apparatus comprises at least two buses (100), a first control component (202), and at least two capacitors (300). The at least two buses (100) are used for being connected to the motor (900). One end of the first control component (202) is connected to one bus (100) of the at least two buses (100). One end of one capacitor (300) of the at least two capacitors (300) is connected to the other end of the first control component (202); the other end of the capacitor (300) is connected to the other bus (100) of the at least two buses (100); and both ends of the other capacitor (300) of the at least two capacitors (300) are connected to the at least two buses (100), respectively. When the motor (900) is driven by the control apparatus, the first control component (202) can control whether the capacitor (300), connected in series to the first control component (202), of the at least two capacitors (300) is connected to the control apparatus, thereby reducing system low-frequency noise caused by torque ripple of the control apparatus.

IPC Classes  ?

• H02M 5/458 - Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
• H02M 1/32 - Means for protecting converters other than by automatic disconnection
• D06F 34/08 - Control circuits or arrangements thereof
• H02P 27/06 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters

Abstract

Provided are a permanent magnet, a rotor assembly and an electric motor. The permanent magnet is used in the electric motor, and comprises: a first end face; a second end face arranged opposite and spaced apart from the first end face; a first side face; a second side face, wherein both the first side face and the second side face are positioned between the first end face and the second end face, are arranged opposite each other, and are both suitable for extending in a direction from a central portion to an edge of a rotor core of the electric motor; and a transition surface positioned between the first side face and the second end face and/or between the second side face and the second end face, wherein the distance from the transition surface to the first end face is smaller than the distance from the first end face to the second end face. The present application is favorable for reducing a back electromagnetic force harmonic wave, a cogging torque and a torque ripple.

IPC Classes  ?

• H02K 1/27 - Rotor cores with permanent magnets
• H01F 7/02 - Permanent magnets

Abstract

Provided are an electric motor rotor and an electric motor, the electric motor rotor comprising a rotor core and a plurality of permanent magnets, wherein the plurality of permanent magnets are arranged in the circumferential direction of the rotor core so as to form a plurality of magnetic poles in the circumferential direction of the rotor core, the magnetization directions of two adjacent magnetic poles are opposite to each other, an angle between the magnetic domain orientation of the permanent magnet in each magnetic pole and the center line of the magnetic pole is α, and α is not less than 0 degrees and is not more than 40 degrees, so as to form a magnetic characteristic where the magnetic flux density is large at the center of the magnetic pole and gradually decreases towards two ends in the circumferential direction.

IPC Classes  ?

• H02K 1/27 - Rotor cores with permanent magnets

Abstract

The present application provides an external rotor permanent magnet motor and a washing machine. The external rotor permanent magnet motor comprises: a stator; and an external rotor, which is sleeved on the outside of the stator and is provided concentrically with the stator. The external rotor comprises: a rotor iron core, which is an annular structure; and multiple permanent magnets. The number of rotor poles provided by the multiple permanent magnets arranged in the circumferential direction of the rotor iron core is 40, the magnetization directions of adjacent two magnetic poles are opposite, the number of stator slots provided on the stator is 30; moreover, in each of the magnetic poles, the angle between the magnetic-domain orientation of the permanent magnet and the centerline of the magnetic pole thereof is α, which is no less than zero degrees and no greater than 40 degrees, thus providing the magnetic characteristic of the magnetic flux density being high at the center of the magnetic poles and gradually decreasing toward both ends in the circumferential direction following the orientation.

IPC Classes  ?

• H02K 1/27 - Rotor cores with permanent magnets

Abstract

The present application provides a power assembly and a fan. The power assembly comprises a first packaging cover, a stator assembly, a first rotor assembly, and at least two supporting components; the first packaging cover is buckled on one side of the stator assembly; a first channel is formed in the stator assembly; the first rotor assembly comprises a first rotating shaft and a first rotor; the first rotor is connected to the first rotating shaft; the first rotor can drive the first rotating shaft to rotate; the first rotor is provided at one side of the stator assembly; an axial air gap is formed between the first rotor and the stator assembly, and a second channel is formed in the first rotating shaft; first supporting components are connected to the first rotating shaft, are provided in the first channel, and are connected to the stator assembly; and second supporting components are connected to the first rotating shaft and connected to the first packaging cover. According to the power assembly provided by the present application, particularly for the power assembly needing to rotate at a high speed, at least two supporting assemblies can better share a force borne by the first rotating shaft, and thus, the axial strength of the first rotating shaft is improved.

IPC Classes  ?

• H02K 16/00 - Machines with more than one rotor or stator
• H02K 5/167 - Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings
• H02K 5/173 - Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
• F04D 25/08 - Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
• F04D 29/38 - Blades

Abstract

A power assembly (910) and a fan. The power assembly (910) comprises a housing (100), a stator assembly (200), a rotor assembly (300), and a rotating shaft (400); the stator assembly (200) is disposed in the housing (100); the rotor assembly (300) is located on one side of the stator assembly (200) in an axial direction to form an axial air gap between the rotor assembly (300) and the stator assembly (200); the rotating shaft (400) has a first end connected to the rotor assembly (300), and a second end passing through the stator assembly (200) and extending to the outside of the housing (100). The rotor assembly (300) is disposed on one side of the stator assembly (200) in the axial direction of the rotating shaft (400), so that the magnetic flux direction of the power assembly (910) is the axial direction, and thus, in the case of identical output power and identical efficiency, the axial length is smaller.

IPC Classes  ?

• H02K 1/27 - Rotor cores with permanent magnets
• H02K 1/16 - Stator cores with slots for windings

Abstract

An electrical fan and an electric appliance are provided. The fans has a driving structure, an impeller, a wind hood and a diffuser. The impeller has a cover plate installed on the driving structure. The wind hood is covered on the impeller and has an air inlet and an air outlet communicated to each other. The diffuser is located at one end of the impeller facing the air outlet. The diffuser has a first protrusion connected to the driving structure. The first protrusion protrudes in a direction of the wind hood. The diameter of an end of the first protrusion adjacent the cover plate is smaller than the diameter of an end away from the cover plate. The diffuser has an inner ring arm connected to the first protrusion and an outer ring arm sleeved outside the inner ring arm.

IPC Classes  ?

• H02K 9/06 - Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
• H02K 1/18 - Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
• H02K 1/20 - Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
• H02K 5/20 - Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
• H02K 7/08 - Structural association with bearings
• H02K 11/33 - Drive circuits, e.g. power electronics

Abstract

A stator assembly and a motor are provided. The stator assembly has a stator core and a winding. The stator core has a stator yoke portion, at least one stator tooth, and at least one winding. The stator tooth is disposed along the axial direction of the stator yoke portion. The stator tooth is detachably connected to the stator yoke portion. The winding is wound on the stator tooth. The stator yoke portion is provided with a stator yoke groove and/or a stator projection adapted to the shape of the stator tooth. The stator tooth passes through the stator yoke groove and/or the stator projection to form the stator core

IPC Classes  ?

• H02K 1/14 - Stator cores with salient poles
• H02K 16/02 - Machines with one stator and two rotors

Abstract

An outdoor unit for an air conditioner, and an air conditioner are provided. The outdoor unit has a housing and a draught fan. The housing is provided with a first air exchange port and a second air exchange port. The draught fan is arranged in the housing and located between the first air exchange port and the second air exchange port. The draught fan has an electric motor, a first fan, and a second fan. The electric motor has two rotors which rotate independently of each other, and a first output shaft and a second output shaft connected to the two rotors respectively. The first output shaft and the second output shaft are respectively fixedly connected to the first fan and the second fan for driving the first fan and the second fan to rotate independently of each other.

IPC Classes  ?

• F24F 1/38 - Fan details of outdoor units, e.g. bell-mouth shaped inlets or fan mountings
• H02K 5/128 - Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas using air-gap sleeves or air-gap discs
• H02K 9/06 - Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
• H02K 16/00 - Machines with more than one rotor or stator

Abstract

A motor and a fan are provided. The motor has a stator assembly, two mutually independent rotor assemblies, and two mutually independent rotating shaft assemblies. The stator assembly has a stator core and two groups of mutually independent windings. The rotor assemblies are oppositely and coaxially arranged on two axial sides of the stator assembly and form an axial air gap with the stator assembly. The two rotor assemblies are configured to rotate independently. The two mutually independent rotating shaft assemblies are coaxially connected with the two rotor assemblies, respectively, and protrude in a direction of the same side away from the stator core along the axial direction of the motor.

IPC Classes  ?

• H02K 16/02 - Machines with one stator and two rotors
• H02K 1/16 - Stator cores with slots for windings
• H02K 1/18 - Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
• H02K 1/27 - Rotor cores with permanent magnets
• H02K 7/08 - Structural association with bearings

Abstract

A fan is provided. The fan has a motor and a first rotating shaft. The motor has a stator assembly, a rotor and a winding. The stator assembly has a stator yoke portion and a stator tooth detachably connected to each other. The winding is wound on the stator tooth. The stator yoke portion has a stator yoke slot and/or a stator projection, adapted to the shape of the stator tooth. The stator tooth axially pass through the stator yoke slot and/or the stator projection to form a stator core. A first fan blade is arranged at an end of the first rotating shaft to rotate the first fan blade when the first rotating shaft rotates.

IPC Classes  ?

• H02K 1/14 - Stator cores with salient poles
• H02K 1/18 - Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
• H02K 7/14 - Structural association with mechanical loads, e.g. with hand-held machine tools or fans
• H02K 1/16 - Stator cores with slots for windings

Abstract

A drive apparatus, a control method, an electrical device and a storage medium. The drive apparatus comprises a first electric motor (110), which is connected to a power source (200); and a first drive control circuit (120), wherein the first drive control circuit (120) is used for acquiring a busbar voltage signal and an alternating-current voltage signal of the first electric motor (110), and the first drive control circuit (120) can control an operation mode of the first electric motor (110), and/or control an input power source power factor of the drive apparatus. In the method, by means of the first electric motor (110) and the first drive control circuit (120) connected thereto, the input power source power factor is controlled, and a busbar voltage is controlled; and a traditional electric reactor or power factor correction circuit is replaced, such that the aims of circuit simplification and cost reduction are achieved.

IPC Classes  ?

• H02P 5/74 - Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more ac dynamo-electric motors

Abstract

A control method for a clothes treatment device, a clothes treatment device, and a storage medium. The control method for a clothes treatment device comprises: detecting initial inertia of a clothes treatment device in a preset load state, and calculating the difference between the initial inertia and preset inertia; and detecting load inertia of the clothes treatment device, and calibrating the load inertia by means of the difference. On the one hand, accurate load inertia can be obtained, thereby preventing the difference in manufacturing of the clothes treatment device from affecting the load inertia detection accuracy; on the other hand, suitable washing parameters can be obtained on the basis of the accurate load inertia, thereby improving the clothes washing effect and avoiding the problem of waste of water and electricity.

IPC Classes  ?

• D06F 39/00 - LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES - Details of washing machines not specific to a single type of machines covered by groups
• D06F 33/00 - Control of operations performed in washing machines or washer-dryers

Abstract

A control method and control apparatus for a laundry treatment device, and a laundry treatment device. The control method for the laundry treatment device comprises: receiving an eccentricity detection signal (102); determining whether the memory of the laundry treatment device stores the load weight value of the laundry treatment device (104); determining that the memory stores the load weight value, and sensing the amount of eccentricity of the laundry treatment device according to the load weight value (106); and determining that the memory does not store the load weight value, measuring the load weight value of the laundry treatment device, storing the measured load weight value to the memory, and according to the measured load weight value, sensing the amount of eccentricity of the laundry treatment device (108). According to the technical solution, it is avoided to perform load weight identification when sensing the eccentricity each time, the time of sensing the eccentricity can be reduced, and the dewatering time of the laundry treatment device is reduced.

IPC Classes  ?

• D06F 33/48 - Preventing or reducing imbalance or noise
• D06F 33/40 - Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of centrifugal separation of water from the laundry

Abstract

A motor controller (1) of an electrical appliance (200), a motor apparatus (100) of the electrical appliance, and the electrical appliance. The motor controller comprises: a first control circuit (102), the first control circuit being electrically connected to a first drive motor (2) and a second drive motor (3) and used for controlling the first drive motor and the second drive motor to operate; and a second control circuit (104), the second control circuit being electrically connected to windings of the second drive motor and used for controlling the windings (32a, 32b, 32c) of the second drive motor to serve as a reactor. When a reactor is required, the windings of the second drive motor are used as the reactor, thereby simplifying the structure of the electrical appliance, saving the utilization space inside the whole machine, improving the integration level of the electrical appliance, reducing mounting steps, improving the production efficiency, and reducing system material costs of the electrical appliance.

IPC Classes  ?

• H02P 29/00 - Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors

Abstract

The present application provides a motor rotor position detection method, a device, and a motor controller. The method comprises: after a first interference signal having a frequency f is injected into a motor drive loop, acquiring, from a drive current, a positive-sequence current component having a frequency of f and a negative-sequence current component having a frequency of f1, wherein f1 is less than f; acquiring a current drive current feedback value; determining a current reference coefficient value according to the current drive current feedback value; determining a current offset angle according to the current reference coefficient value, an amplitude of the positive-sequence current component having a frequency of f, and an amplitude of the negative-sequence current component having a frequency of f1; and determining a current position of a motor rotor according to the current offset angle. The method determines an offset angle of a rotor of a motor rotor according to an injected interference signal and a drive current feedback value of the motor, and in turn determines a position of the rotor of the motor by means of the offset angle, thereby improving accuracy of rotor position detection.

IPC Classes  ?

• H02P 6/18 - Circuit arrangements for detecting position without separate position detecting elements
• H02P 25/026 - Synchronous motors controlled by supply frequency thereby detecting the rotor position

Abstract

A method and device for detecting the number of motor pole pairs, and a motor controller. The method comprises: acquiring the reference load-carrying capacity of a reference motor (S101); controlling a target motor to operate at a preset motor speed, and acquiring the current actual load-carrying capacity of the target motor (S102); and according to the actual load-carrying capacity, the reference load-carrying capacity, and parameters of the reference motor, calculating the number of pole pairs of the target motor (S103). In the method, the number of pole pairs of the target motor is calculated by means of using the parameters of the reference motor and the preset motor speed without increasing hardware costs, so that the target motor model is identified according to the number of pole pairs, and the cost of identification and the occupation of resources is reduced on the basis of ensuring the reliability and accuracy of the identification results.

IPC Classes  ?

• G01R 31/34 - Testing dynamo-electric machines
• H02P 21/14 - Estimation or adaptation of machine parameters, e.g. flux, current or voltage

Abstract

The present application provides a motor control method, a motor control apparatus, a motor system, and a storage medium. The motor control method comprises: obtaining a busbar voltage of a motor; and determining that the busbar voltage is greater than a first voltage threshold or the busbar voltage is less than a second voltage threshold, and controlling a switch tube of an intelligent power module of the motor according to the busbar voltage and a voltage instruction value so as to shut down the motor, wherein the first voltage threshold is greater than the second voltage threshold. According to the technical solution of the present application, the motor can be reliably shut down by means of the busbar voltage control in the case of an overvoltage, undervoltage or power-off busbar voltage fault, which avoids the damage to a controller or the motor in the case of the busbar voltage fault, and eliminates the motor stuck sound under the power-off fault, and the use effect is good.

IPC Classes  ?

• H02H 7/09 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from norm for dynamo-electric motors against phase interruption

Abstract

Provided are an electric motor control method, an electric motor control apparatus, an electric motor system and a storage medium. The electric motor control method comprises: limiting an instruction value of a quadrature axis current of an electric motor according to a difference value between a bus bar voltage and a voltage threshold, determining a positive limitation or a negative limitation according to the rotational speed of the electric motor and/or calculating a compensation angle of a rotor position angle of the electric motor according to the difference value between the bus bar voltage and the voltage threshold, and determining a lead or a lag relationship of the compensation angle according to the rotational speed of the electric motor so as to compensate for the rotor position angle; and controlling the running of the electric motor according to the instruction value of the quadrature axis current and/or the compensated rotor position angle. By means of the technical solution of the present application, in the process of deceleration braking of an electric motor, a quadrature axis current is limited and/or a rotor position angle is compensated for, and then, the compensated rotor position angle is fed back to the next closed-loop running operation, thereby realizing complete self-calibration control over the electric motor.

IPC Classes  ?

• H02P 21/36 - Arrangements for braking or slowing; Four quadrant control

Abstract

The present application provides a stator sheet, a stator core, a stator, and a motor. The stator sheet comprises yoke parts and tooth parts, and the tooth parts have one ends connected to the yoke parts and the other ends extending away from the yoke parts, wherein at least part of the stator sheet has a rectangular structure or a sector structure, and each tooth part comprises a first tooth body, a second tooth body, and a third tooth body, the second tooth body being provided on one side of the first tooth body, and the third tooth body being provided on the other side of the first tooth body away from the second tooth body. The present application can improve the winding efficiency and winding convenience of winding coils.

IPC Classes  ?

• H02K 1/14 - Stator cores with salient poles
• H02K 3/34 - Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation

Abstract

A stator iron core (20), comprising: a stator yoke (111) and a stator tooth (112), the stator yoke (111) having a notch and at least one stator yoke section (1115); the stator tooth (112) comprises at least one stator tooth shoe (1122) and at least two stator tooth bodies (1121), the at least two stator tooth bodies (1121) being arranged along the circumferential direction of the stator iron core (20), the two ends of any one stator tooth body (1121) respectively being connected to the stator yoke section (1115) and the stator tooth shoe (1122); any two adjacent stator tooth bodies (1121) are connected by means of the stator tooth shoe (1122) or the stator yoke section (1115), and the stator tooth shoe (1122) of the stator tooth part (112) and the stator yoke section (1115) of the stator yoke (111) are arranged in a staggered manner along the circumferential direction of the stator iron core (20). The stator yoke (111) of the present stator iron core (20) is a non-annular structure and, compared to annular structures, reduces the circumferential size of the stator yoke (111), thereby reducing the weight of the stator iron core (20), and also facilitating a reduction in the size of an insulating member (12) connected to the stator iron core (20), lightening the motor, and also reducing production costs of the product. Also relating to a stator assembly (10), a motor (1), and an electromechanical device (2).

IPC Classes  ?

• H02K 1/14 - Stator cores with salient poles
• H02K 1/20 - Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
• H02K 3/18 - Windings for salient poles

Abstract

Disclosed are a switch circuit, a motor control system, and a vacuum cleaner. The switch circuit comprises a power supply unit, an enable unit, a controller, and a switch unit, wherein the controller is used for, when a receiving end receives an on signal, continuously outputting an enable signal by means of a sending end till the receiving end receives an off signal and maintaining the enable signal till a shutdown control program is completely executed, and the controller is further used for starting to execute a motor operation control program when the receiving end receives the on signal and starting to execute a motor shutdown control program when the receiving end receives the off signal. The switch circuit can avoid a motor entering a free shutdown state due to the switch circuit being in an uncontrollable state while implementing zero-current standby power consumption, thereby avoiding long time of shutdown ending sound and low-frequency vibration, and improving use experience of users; moreover, a delay processing circuit does not need to be added, and the present application has the advantages of low cost and strong reliability.

IPC Classes  ?

• H02P 3/06 - Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
• A47L 9/28 - Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means

Abstract

Provided in the present application are an air conditioner outdoor unit and an air conditioning apparatus. The air conditioner outdoor unit comprises: a housing, wherein the housing is provided with a first air exchange port and a second air exchange port; and a draught fan, which is arranged in the housing and located between the first air exchange port and the second air exchange port. The draught fan comprises an electric motor, a first fan and a second fan, wherein the electric motor comprises two rotors which rotate independently of each other, and a first output shaft and a second output shaft connected to the two rotors separately; and the first output shaft and the second output shaft protrude, separately, towards the same side of an axial direction of the electric motor in the axial direction of the electric motor, are separately fixedly connected to the first fan and the second fan, and are used for driving the first fan and the second fan to rotate independently of each other. According to the present application, one electric motor is used for driving the first fan and the second fan to rotate at the same speed or different speeds, or in the same direction or different directions, such that the air conditioner outdoor unit has the functions of heat exchange, self-cleaning, self-drying, headwind starting, etc., and has the advantages of being easy to install, small in size specification, large in air volume, high in energy efficiency, low in manufacturing cost, etc.

IPC Classes  ?

• F24F 1/38 - Fan details of outdoor units, e.g. bell-mouth shaped inlets or fan mountings

Abstract

The present application provides a motor and a fan. The motor comprises: a stator assembly, comprising a stator core and two sets of mutually independent windings, a hollow channel being provided in a radial middle part of the stator core, stator teeth protruding towards two axial sides of the stator core being provided at the two axial ends of the stator core, and the two sets of windings being respectively wound around the two sets of stator teeth; two mutually independent rotor assemblies, which are arranged oppositely and coaxially on both sides of the axial direction of the stator assembly, and form an axial air gap with the stator assembly, and the two rotor assemblies being configured to rotate independently of each other; and two mutually independent rotation shaft assemblies, which are coaxially connected to the two rotor assemblies respectively, and project in a direction of the same side away from the stator core along the axial direction of the motor, a part of the two rotation shaft assemblies being both provided in the hollow channel. The present application realizes dual power independent output of a motor, and has significant advantages such as a compact structure, a powerful practical function, convenient mounting, a small axial size, and a low manufacturing cost.

IPC Classes  ?

• H02K 16/02 - Machines with one stator and two rotors

Abstract

The present application provides a motor and a blower. The motor comprises: a stator assembly comprising a stator core and two independent windings. Two axial-direction terminal portions of the stator core are provided with stator teeth protruding and extending toward two axial-direction sides thereof, and the two windings are wound on the two sets of stator teeth, respectively; two independent rotor assemblies oppositely and coaxially disposed at two axial-direction sides of the stator assembly, and forming axial-direction air gaps with the stator assembly, wherein the two rotor assemblies are configured to rotate independently; and two independent rotating shaft assemblies coaxially connected to the two rotor assemblies, respectively, and protruding and extending away from the stator core in an axial direction of the motor. The present application achieves two independent power outputs of one motor, and enables driving two fans to independently rotate at respective rotating speeds and in respective rotating directions without mutual interference, thereby reducing the axial dimension of blowers and lowering costs thereof. The invention provides high practicability, expands functions of blowers, and eliminates gear mechanisms, thereby reducing product manufacturing and installation difficulties.

IPC Classes  ?

• H02K 16/02 - Machines with one stator and two rotors

Abstract

An operation control method and system for a clothing treatment device having a drum and a motor is provided. Load inertia of the drum and a fluctuation parameter of the motor are obtained. Load eccentric mass of the clothing treatment device is obtained based on the load inertia, the fluctuation parameter, and predetermined relationship data that is obtained based on pre-stored load inertia, torque fluctuation and load eccentric mass. The fluctuation parameter can be a torque fluctuation parameter or a rotation speed fluctuation parameter. The clothing treatment device can be controlled according to the load eccentric mass to optimize washing operations. For example, clothing and/or inlet water amount can be timely adjusted according to the calculated load eccentric mass. Thus, the clothing treatment device is prevented from producing significant noise during operations, and the service life of the clothing treatment device can be prolonged.

IPC Classes  ?

• D06F 33/48 - Preventing or reducing imbalance or noise
• G05B 19/416 - Numerical control (NC), i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control of velocity, acceleration or deceleration

Abstract

A fan and an electric appliance. The fan comprises: a driving structure (4); an impeller (1) comprising a cover plate (10) installed at the driving structure (4); a shroud (3) covering the impeller (1); a diffuser (2) positioned at one end of the impeller (1) facing an air outlet (32) and comprising a first protrusion portion (20) connected to the driving structure (4), the first protrusion portion (20) protruding toward the shroud (3), the diffuser (2) further comprising an inner annular member (22), and an outer annular member (24) having a smooth transition connection with the shroud (3), wherein the shroud (3), the cover plate (10) and the diffuser (2) define an air channel comprising a varying cross-section portion close to an air inlet and a constant cross-section portion close to the air outlet. In the fan of the present invention, an air flow can flow through the entire air channel smoothly, and thus the fan has improved efficiency.

IPC Classes  ?

• F04D 25/08 - Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation

Abstract

A driving system having a hollow shaft, a solid shaft arranged in the hollow shaft, a stator, a rotor connected to the hollow shaft, a clutch mechanism selectively engaged to one of the stator and the rotor, and a speed reduction mechanism having a planetary carrier assembly engaged to the clutch mechanism, and a planetary gear train connected between the solid shaft and the rotor, wherein where the clutch mechanism is engaged to the stator in a transmission manner, the planetary carrier assembly is connected with the stator, and the rotor drives the solid shaft and the hollow shaft to operate at a differential speed, and where the clutch mechanism is engaged to the rotor in the transmission manner, the planetary carrier assembly is connected with the rotor, and the rotor drives the solid shaft and the hollow shaft to operate at a same speed by the planetary gear train.

IPC Classes  ?

• D06F 37/30 - Driving arrangements
• D06F 23/02 - Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry and rotating or oscillating about a horizontal axis
• D06F 33/56 - Control of the operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of washing
• F16D 11/14 - Clutches in which the members have interengaging parts with clutching members movable only axially
• F16D 27/108 - Magnetically-actuated clutches; Control or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with axially movable clutching members
• F16D 27/118 - Magnetically-actuated clutches; Control or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with interengaging jaws or gear teeth
• F16D 27/14 - Magnetically-actuated clutches; Control or electric circuits therefor - Details
• F16H 3/46 - Gearings having only two central gears, connected by orbital gears
• F16H 57/021 - Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
• F16H 57/029 - Gearboxes; Mounting gearing therein characterised by means for sealing gearboxes, e.g. to improve airtightness
• F16H 57/08 - General details of gearing of gearings with members having orbital motion
• F16H 63/30 - Constructional features of the final output mechanisms

Abstract

The present disclosure provides a bearing assembly, a rotor assembly and a draught fan. The bearing assembly has a shaft sleeve and a shaft extending through the shaft sleeve. An inner wall of the shaft sleeve is provided with two grooves in a circumferential direction. The shaft is provided with two channels corresponding to the two grooves respectively. The channels and the grooves form two raceways. Multiple rolling bodies are disposed between the shaft and the shaft sleeve and movable in the raceways. The shaft sleeve has an outer diameter of 13 mm, and a portion of the shaft extending within the shaft sleeve has a diameter of 5 mm.

IPC Classes  ?

• F04D 29/049 - Roller bearings
• F16C 19/06 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row of balls

Abstract

A bearing assembly, a rotor assembly and a fan, wherein the bearing assembly (1) comprises: a bushing (14), the inner wall thereof being provided thereon with two grooves along the peripheral direction; a shaft (12), the bushing (14) being sleeved on the shaft (12), the shaft (12) being provided thereon with channels that correspond to each groove among the two grooves, and the channels and the corresponding grooves forming a roller track; and a plurality of rolling bodies (16) which are provided between the shaft (12) and the bushing (14) and which move inside of the roller track, wherein the outer diameter of the bushing is 13 mm, and the diameter of the part at which the shaft and the bushing are provided relative to each other is 5 mm. A fan having the bearing assembly (1) may operate reliably under a rotation speed of at least 150000 rpm.

IPC Classes  ?

• F16C 19/18 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
• F04D 29/059 - Roller bearings

Abstract

A fan (3), comprising a motor. The motor comprises at least one stator assembly and at least one rotor corresponding to the stator assembly, wherein the stator assembly comprises a detachable connected stator yoke (11) and at least one stator tooth (12), a winding (21) is wound on the stator tooth (12), the stator yoke (11) is provided with stator yoke slots (111) and/or stator protrusions that are adapted to the shape of the stator teeth (12), and the stator teeth (12) pass through the stator yoke slots (111) and/or the stator protrusions in the axial direction to form a stator core (1). The fan also comprises a first rotating shaft (33) that is connected to at least one rotor, and a first fan blade (31) is provided at one end of the first rotating shaft (33) to drive the first fan blade (31) to rotate when the first rotating shaft (33) rotates. The fan (3) has a simple and compact structure; the winding process is convenient and easy to operate; and the motor power expansion capability is good. The connection between the rotor and the first fan blade (31) by means of the first rotating shaft (33) enables the first rotating shaft (33) to drive the first fan blade (31) to rotate during the rotation of the rotor, so that the wind power generated by the first fan blade (31) can also be expanded with the expansion of the motor power.

IPC Classes  ?

• H02K 16/00 - Machines with more than one rotor or stator
• H02K 1/14 - Stator cores with salient poles

Abstract

Provided in the present application are a stator assembly and a motor. The stator assembly comprises a stator core which comprises: a stator yoke portion; and at least one stator tooth, each stator tooth being disposed along the axial direction of the stator yoke portion, and the stator teeth being detachably connected to the stator yoke portion; at least one winding wound on the at least one stator tooth, the stator yoke portion being provided with a stator yoke groove and/or a stator boss adapted to the shape of the stator tooth, and the stator tooth passing through the stator yoke groove and/or the stator boss to form the stator core. According to the present application, each stator tooth is detachably connected to the stator yoke portion such that the winding is not limited by the shape of the stator core when wound, the winding mode is flexible, and winding efficiency of the winding is improved. In addition, by reasonably arranging the size of the stator teeth or the spacing between the stator teeth so as to adjust the size of the winding grooves, the number of windings can be flexibly configured such that the power level of the stator core is reasonably adjusted.

IPC Classes  ?

• H02K 1/14 - Stator cores with salient poles

Abstract

An operation control method and system for a washing machine motor, a washing machine, and a computer-readable storage medium. The method comprises: controlling a rotor of a motor to perform accelerating rotation in a first rotation direction, acquiring a current rotation speed of the motor, and on determining that the rotation speed of the motor has reached a first target rotation speed (N1) and the operation has lasted for a first preset period of time (T1), controlling the rotation speed of the motor to continuously change from the first target rotation speed (N1) to a second target rotation speed (N2) without any stopping time; and on determining that the rotation speed of the motor has reached the second target rotation speed (N2) and the operation has lasted for a second preset period of time (T2), controlling the rotation speed of the motor to continuously change from the second target rotation speed (N2) to the first target rotation speed (N1) without any stopping time, wherein the direction of the first target rotation speed (N1) is opposite to the direction of the second target rotation speed (N2). In the process of switching between the first target speed (N1) and the second target speed (N2) of the washing machine in a washing process, a zero-speed stopping time is eliminated, thereby reducing clothes washing time.

IPC Classes  ?

• D06F 33/02 - Controlling a series of operations in washing machines, e.g. programme-control arrangements for washing and drying cycles electrically

Abstract

The present invention relates to the field of electrical equipment, and provides a permanent magnet motor. The permanent magnet motor comprises: a stator core comprising a stator yoke and a plurality of stator teeth, the plurality of stator teeth being circumferentially provided along the annular stator yoke at intervals; and a rotor comprising a permanent magnet holder and a plurality of permanent magnets mounted on the permanent magnet holder. The permanent magnet holder comprises a body extending in the axial direction of the rotor. The plurality of permanent magnets is circumferentially provided along the body at intervals. Each permanent magnet has a side facing the stator teeth. The side of at least one permanent magnet at least partially corresponds to axial end portions of the stator teeth at intervals to provide a magnetic flux having a component in the axial direction of the permanent magnet motor. The present invention can provide the magnetic flux having a component in the axial direction of the permanent magnet motor to the stator teeth by means of the sides of the permanent magnets, so as to increase the total magnetic flux entering the stator teeth.

IPC Classes  ?

• H02K 1/27 - Rotor cores with permanent magnets
• H02K 1/14 - Stator cores with salient poles
• H02K 16/00 - Machines with more than one rotor or stator

Abstract

An electric motor (100) includes an excitation stator (10), a salient-pole rotor (20) and an excitation rotor (30), any two of the excitation stator (10), the salient-pole rotor (20) and the excitation rotor (30) being rotatable relative to each other; and a switching actuator (50) configured to select at least one of the salient-pole rotor (20) and the excitation rotor (30) to serve as a rotor rotatable relative to the excitation stator (10) by selectively fixing relative positions of two of the excitation stator (10), the salient-pole rotor (20) and the excitation rotor (30).

IPC Classes  ?

• H02K 16/02 - Machines with one stator and two rotors
• H02K 7/08 - Structural association with bearings
• H02K 13/00 - Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation

Abstract

Disclosed are a drive system (10) of a washing machine (100), and a drum washing machine (100) having same. The drive system (10) comprises: an impeller shaft (1), with a first end of the impeller shaft (1) being suitable for being connected to an impeller (40); a drum shaft sleeve (2), with a first end of the drum shaft collar (2) being adapted to be connected to a drum (30); a bracket assembly (3), with the drum shaft sleeve (2) being arranged on the bracket assembly (3); an electric motor (4); and a belt transmission mechanism (5), wherein the belt transmission mechanism (5) comprises a belt pulley (51) and a belt (52); one end of the belt (52) is sleeved on an outer circumference side of an output shaft (41) of the electric motor (4), and the other end of the belt (52) is sleeved on an outer circumference side of the belt pulley (51); and the belt pulley (51) is connected to a second end of the drum shaft sleeve (2).

IPC Classes  ?

• D06F 37/30 - Driving arrangements
• D06F 37/40 - Driving arrangements for driving the receptacle and an agitator or impeller, e.g. alternatively

Abstract

Provided is a food processor, comprising: a container (10), a base (20), an electric motor (21), a first rotating shaft (13), a second rotating shaft (14), first cutting tools (11, 15) and a second cutting tool (12), the electric motor (21) mounted inside the base (20) comprising a stator (211), first rotors (212, 214) and second rotors (213, 215), wherein the stator (211), the first rotors (212, 214) and the second rotors (213, 215) are nested with each other; each adjacent pair of the stator (211), the first rotors (212, 214) and the second rotors (213, 215) are separated by an air gap; the first rotors (212, 214) and the second rotors (213, 215) rotate independent from each other; and the first rotors (212, 214) and the second rotors (213, 215) are respectively used for driving the first rotating shaft (13) provided with the first cutting tools (11, 15) and the second rotating shaft (14) provided with the second cutting tool (12) to rotate independently, thereby completely grinding food and improving the grinding efficiency and the grinding effect. The food processor operates in a way of no mechanical differential and no clutch to achieve dual-power food grinding, and has a high integration level, high power density, low energy consumption and high reliability.

IPC Classes  ?

• A47J 43/046 - Machines for domestic use not covered elsewhere, e.g. for grinding, mixing, stirring, kneading, emulsifying, whipping or beating foodstuffs, e.g. power-driven with tools driven from the bottom side
• A47J 43/07 - Parts or details, e.g. mixing tools, whipping tools
• A47J 43/08 - Driving mechanisms

Abstract

A fan (1), comprising a motor (10). The motor (10) comprises a stator (101), a first rotor (102), and a second rotor (103); the stator (101), the first rotor (102), and the second rotor (103) are nested with each other; the stator (101), the first rotor (102), and the second rotor (103) are separated from each other by air gaps; the first rotor (102) and the second rotor (103) rotate independently; the first rotor (102) and the second rotor (103) respectively drive a first rotating shaft (13) provided with a first fan blade (11) and a second rotating shaft (14) provided with a second fan blade (12) to rotate concentrically. The fan realizes double-shaft double-power rotation, and is high in system integration level, high in reliability and low in noise.

IPC Classes  ?

• F04D 29/00 - NON-POSITIVE-DISPLACEMENT PUMPS - Details, component parts, or accessories

Abstract

An operation control method for a clothing treatment device, comprising: obtaining the load inertia of a drum and the torque fluctuation or speed fluctuation of a motor; obtaining the load eccentricity of the clothing treatment device according to the load inertia, the torque fluctuation, and pre-stored relationship data among storage load inertia, torque fluctuation, and load eccentricity; or obtaining the load eccentricity of the clothing treatment device according to the load inertia, the speed fluctuation, and pre-stored relationship data among storage load inertia, speed fluctuation, and load eccentricity; and controlling the clothing treatment device according to the load eccentricity to adjust the clothing. According to the application, clothing and/or inlet water amount are timely adjusted according to calculated load eccentricity; thus, the clothing treatment device is prevented from producing great noise during operation, and the service life of the clothing treatment device is prolonged.

IPC Classes  ?

• D06F 33/02 - Controlling a series of operations in washing machines, e.g. programme-control arrangements for washing and drying cycles electrically

Abstract

A non-mechanical differential coaxial counter-rotating power device (100) includes an inner shaft (51), an outer shaft (52), a reluctance rotor (30), a permanent magnet rotor (40), a stator (10) and a driving device (20). The outer shaft (52) is fitted over the inner shaft (51), an end of the inner shaft (51) protruding from the outer shaft (52). The reluctance rotor (30) is connected to one of the end of the inner shaft (51) and an end of the outer shaft (52), and the permanent magnet rotor (40) is connected to the other one of the end of the inner shaft (51) and the end of the outer shaft (52). The stator (10) is coaxially disposed with the reluctance rotor (30) and disposed at an inner side or an outer side of the reluctance rotor (30) opposite to the permanent magnet rotor (40). The stator (10) includes a stator core (11) and a main winding (12) and an auxiliary winding (13), and the main winding and the auxiliary winding are wound around the stator core (11). The driving device (20) is connected to the main winding (12) and the auxiliary winding (13) to drive the main winding (12) and the auxiliary winding (13), respectively.

IPC Classes  ?

• H02K 16/02 - Machines with one stator and two rotors
• H02K 3/20 - Windings for salient poles for auxiliary purposes, e.g. damping or commutating
• H02K 11/33 - Drive circuits, e.g. power electronics
• H02K 1/14 - Stator cores with salient poles
• H02K 1/24 - Rotor cores with salient poles
• H02K 1/27 - Rotor cores with permanent magnets

Abstract

The present invention provides a power failure protection control method for a permanent magnet synchronous motor control system, a power failure protection control device, and a permanent magnet synchronous motor control system. The power failure protection control method comprises: measuring a voltage value of a direct current bus module in real time; determining whether the duration, for which the voltage value reduces from a first preset voltage value to a second preset voltage value, is less than or equal to a first preset duration; and when the duration is less than or equal to the first preset duration, setting all switch tubes of an intelligent power module into a high-resistance state. All switch tubes of the intelligent power module are set to the high-resistance state, such that the voltage generated, at the direct current bus module, by the back electromotive force transiently produced by a permanent magnet synchronous motor is less than a safety voltage, avoiding the component damage caused by relatively high voltage generated, at the direct current bus module, by the back electromotive force produced by the permanent magnet synchronous motor due to power failure.

IPC Classes  ?

• H02H 7/09 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from norm for dynamo-electric motors against phase interruption
• H02H 9/04 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
• H02P 6/00 - Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor

Abstract

fqdd of the permanent magnet synchronous motor. The identification method for the permanent magnet flux linkage used in the present invention can perform online identification on the permanent magnet flux linkage without affecting the normal operation of the motor, improving the identification precision, reducing the change in parameters such as speed loop control related to the permanent magnet flux linkage, and improving the control effect for the permanent magnet synchronous motor.

IPC Classes  ?

• H02P 21/14 - Estimation or adaptation of machine parameters, e.g. flux, current or voltage
• H02P 25/022 - Synchronous motors

Abstract

Provided are a driving system of a drum washing machine and a drum washing machine. The driving system includes: a drum shaft sleeve, a pulsator shaft, a driving source, a clutch mechanism and a speed reducing mechanism, wherein the pulsator shaft is rotatably provided inside the drum shaft sleeve, the driving source comprises a stator and a rotor, and the rotor is fixedly connected to the drum shaft sleeve; the clutch mechanism is controlled such that same is optionally engaged, in a transmission manner, to one of the stator and the rotor; and the speed reducing mechanism comprises a planet carrier assembly engaged with the clutch mechanism, and a planetary gear train connected, in a transmission manner, between the pulsator shaft and the rotor. With regard to the clutch mechanism, the clutch mechanism is engaged, in a transmission manner, with the stator, the planet carrier assembly is fixedly connected to the stator, and the rotor drives the pulsator shaft and the drum shaft sleeve to operate at different speeds by the planetary gear train; alternatively, the clutch mechanism is engaged, in a transmission manner, with the rotor, the planet carrier assembly is fixedly connected to the rotor, and the rotor drives the pulsator shaft and the drum shaft sleeve to operate at the same speed by the planetary gear train; and the rotor is directly connected to the drum shaft sleeve, so that the mounting span of the rotor is reduced and the integral rigidity is improved.

IPC Classes  ?

• D06F 37/30 - Driving arrangements

Abstract

A diffuser (10) and a fan; the diffuser (10) comprises: an annular base (102); an upper surface of the annular base (102) is configured as an annular face (1022); and a plurality of diffusing blades (104) circumferentially spaced on the upper surface; the adjacent two diffusing blades (104) form a fluid inlet at the outer edge of the annular face (1022) and form a fluid outlet at the inner edge of the annular face (1022); the diffusing blades (104) have a blade leading edge (1042) disposed at the fluid inlet and a blade trailing edge (1044) disposed at the fluid outlet, respectively; and the blade leading edge (1042) and/or the blade trailing edge (1044) are (is) spatially inclined relative to the axis of the annular base (102)。 By using the diffuser (10), the diffusing capability and the fluid diverting function can be improved, the impact loss at the fluid inlet and/or fluid outlet can be reduced, and meanwhile the technical effect of improving the diffusing capability can be realized.

IPC Classes  ?

• F04D 29/44 - Fluid-guiding means, e.g. diffusers

Abstract

Provided are an electric motor stator (100) and an electric motor (200) having same. The electric motor stator (100) comprises a stator iron core (1) and a stator winding (2), wherein the stator iron core (1) comprises a plurality of sub-stator iron cores (11), each of the sub-stator iron cores (11) comprises a stator yoke (111), two sub-stator tooth parts (114) and two spliced outer end parts (115); the two sub-stator tooth parts (114) are respectively located at two ends in a circumferential direction of the stator yoke (111), the two spliced outer end parts (115) are both arranged outside the stator yoke (111) and are respectively opposite the two sub-stator tooth parts (114), each of spliced outer end parts (115) is provided with a connection protrusion (115a) or a connection groove (115b), and two adjacent sub-stator iron cores (11) are spliced by means of cooperation of the connection protrusion (115a) and the connection groove (115b).

IPC Classes  ?

• H02K 1/14 - Stator cores with salient poles

Abstract

A motor stator (100) and a motor (200) comprising same. The motor stator (100) comprises a stator core (1) and a stator winding (2); the stator core (1) comprises multiple sub-stator cores (11); each of the sub-stator cores (11) comprises a stator yoke (111), at least one stator tooth (112), and two connection outer ends (113); the two connection outer ends (113) are respectively located at the two circumferential ends of the stator yoke (111); the stator tooth (112) is located between the two connection outer ends (113) in the circumferential direction of the stator yoke (111); two grooves (113a) of two connection outer ends (113) where two adjacent sub-stator cores (11) contacting each other constitute a mounting hole (113b); a connection piece is provided in the mounting hole (113b) to implement connection and mounting positioning of the two adjacent sub-stator cores (11).

IPC Classes  ?

• H02K 1/14 - Stator cores with salient poles
• H02K 5/04 - Casings or enclosures characterised by the shape, form or construction thereof

Abstract

A motor stator (100) and a motor (200) comprising same. The motor stator (100) comprises a stator core (1) and a stator winding (2); the stator core (1) comprises multiple sub-stator cores (11); each of the sub-stator cores (11) comprises a stator yoke (111), two sub-stator teeth (114), and two connection outer ends (115); the two sub-stator teeth (114) are respectively located at the two circumferential ends of the stator yoke (111); the two connection outer ends (115) respectively face the two sub-stator teeth (114); two grooves (115a) of two connection outer ends (115) where two adjacent sub-stator cores (11) contacting each other constitute a mounting hole (115b); a connection piece is fitted in the mounting hole (115b) to implement connection and mounting positioning of the two adjacent sub-stator cores (11).

IPC Classes  ?

• H02K 1/14 - Stator cores with salient poles

Abstract

Provided are a fluid pumping device and a household electric appliance comprising the same. The fluid pumping device comprises a pump shell (2) and a pump cover (1) which surround a pump cavity. The pump cover (1) is connected with an inlet pipe (101) which is downwards inserted into the pump cavity, and an outlet pipe (102) is arranged on the peripheral wall of the pump shell (2), wherein an annular heating portion (11) protruding downwards into the pump cavity is formed at the bottom of the pump shell (2), a top-openable impeller (3) located on the radial inner side of the annular heating portion (11) is arranged in the pump cavity, the bottom end of the inlet pipe (101) is connected with a drainage cover (5) with an opening expanded downwards, the drainage cover (5) is arranged above the top surface of the impeller (3) in a covering and spaced manner, and an axial gap between the bottom surface of the drainage cover (5) and the top surface of the impeller (3) is gradually reduced radially outwards.

IPC Classes  ?

• F04D 29/42 - Casings; Connections for working fluid for radial or helico-centrifugal pumps
• F04D 29/44 - Fluid-guiding means, e.g. diffusers
• F04D 29/58 - Cooling; Heating; Diminishing heat transfer
• F04D 29/22 - Rotors specially for centrifugal pumps

Abstract

Disclosed are a stator assembly, an electric motor and a compressor, wherein the stator assembly comprises two stator parts. Each of the stator parts comprises yokes (1) and teeth (2). Each of the yokes (1) is provided with clamping grooves (11). Each of the teeth (2) comprises a first tooth section (21) and a second tooth section (22). At an radially outer end of the second tooth section (22) is provided a catch (23) corresponding to a clamping groove (11). The two yokes (1) are axially aligned and connected to each other. The catch (23) is correspondingly inserted into a clamping groove (11) of the other one of the stator parts. By means of the above-mentioned technical solution, the stator assembly is formed by the combination of the two stator parts, wherein the teeth (2) of the two stator parts are circumferentially and alternatively arranged, and there is an enough space between adjacent teeth (2) of each stator part, which facilitates the winding of a coil and improves the efficiency, and the yokes (1) of the stator parts are integrally formed, which improves the overall strength of the stator parts.

IPC Classes  ?

• H02K 1/14 - Stator cores with salient poles

Abstract

The present invention discloses a rotor (10), and a motor and a compressor having the same. The rotor (10) comprises a plurality of rotor laminations (110), and each rotor lamination (110) is provided with a shaft hole (111) and a plurality of accommodation grooves (112). The outer edge of the cross section of each rotor lamination (110) consists of a plurality of first circular arc segments (113) and a plurality of second circular arc segments (114) alternately disposed thereon. The center of a circle formed by each first circular arc segment (113) is offset from the central axis of the shaft hole (111), and the center of a circle formed by each second circular arc segment (114) is located on the central axis of the shaft hole (111). A plurality of rotor laminations (110) constitutes a plurality of rotor lamination sets (130). The first circular arc segments (113) of each rotor lamination (110) in one of two adjacent rotor lamination sets (130) are opposite the second circular arc segments (114) of each rotor lamination (110) in the other of the two adjacent rotor lamination sets (130) with respect to the axial direction of the rotor (10). The rotor (10) further comprises a plurality of magnets disposed in one-to-one correspondence on the plurality of accommodation grooves (112). The rotor features easy and accurate positioning, high concentricity with a stator, high air gap precision, and operates with few overtones, minimal vibration, and low noise etc.

IPC Classes  ?

• H02K 1/27 - Rotor cores with permanent magnets

Abstract

A core lamination of a motor stator, core of a motor stator, and compressor. The core lamination of a motor stator comprises a yoke portion (10), a reference axis (20), and multiple teeth (30) provided at the yoke portion (10) and protruding toward the reference axis (20). The multiple teeth (30) at least comprise one arc-top tooth (31) and one backward-shifted tooth. An end surface of the arc-top tooth (31) facing the reference axis (20) is an arced surface forming a central opening (50) having the reference axis (20) as a center axis. An end surface of the backward-shifted tooth facing the reference axis (20) does not coincide with the end surface of the arc-top tooth (31), and at least one portion thereof is offset towards an outer side. In this way, the present invention enables superior concentric alignment while reducing magnetic field harmonics in an air gap, thus controlling air gap precision.

IPC Classes  ?

• H02K 1/12 - Stationary parts of the magnetic circuit

Abstract

An impeller (100), fan and motor, the impeller (100) comprising an approximately conical hub (11) and a plurality of blades (12), provided at intervals along a circumferential direction on a peripheral surface of the hub (11). The blades comprise a front edge surface at an inlet end and a rear edge surface at an outlet end. The blades (12) are flat plates that have been twisted. Front edge sections and rear edge sections of the blades (12) are respectively twisted in opposite circumferential directions and form slopes. By adopting an impeller having this structure, fluid loss at the inlet and outlet ends can be effectively reduced, expanding the effective working area of the impeller, markedly improving the operating performance of the impeller, thereby improving the overall performance of a fan and motor employing the impeller having this structure.

IPC Classes  ?

• F04D 29/30 - Vanes
• F04D 29/24 - Vanes

Abstract

An impeller (100), fan and motor, the impeller (100) comprising an approximately conical hub (11) and a plurality of blades (12), provided at intervals along a circumferential direction on a peripheral surface of the hub (11). The blades comprise a front edge surface (121) at an inlet end and a rear edge surface (122) at an outlet end. The blades are flat plates that have been twisted. Rear edge sections of the blades are twisted relative to a circumferential direction and form slopes.

IPC Classes  ?

• F04D 29/28 - Rotors specially adapted for elastic fluids for centrifugal or helico-centrifugal pumps

Abstract

A motor stator (100) and a motor. The motor stator (100) comprises: a stator iron core (1), the stator iron core (1) comprising a stator yoke part (11) and stator tooth parts (12); and winding coils (2) wrapped on the stator yoke part (11), the winding coils (2) being wrapped between every two adjacent stator tooth parts (12), spatially opposite two winding coils (2) being connected in parallel with each other and joined as a phase, and three phases of winding coils (2) being connected head-to-tail to form double triangle wirings.

IPC Classes  ?

• H02K 3/28 - Layout of windings or of connections between windings

Abstract

Disclosed is a coaxial counter-rotating power device without mechanical differential speed (100), comprising an inner shaft (51), an outer shaft (52), a magnetic reluctance rotor (30), a permanent magnet rotor (40), a stator (10) and a driving device (20), wherein the outer shaft (52) is sheathed on the inner shaft (51); one end of the inner shaft (51) protrudes out from the outer shaft (52); the magnetic reluctance rotor (30) is connected to one of the end of the inner shaft (51) and an end of the outer shaft (52); the permanent magnet rotor (40) is connected to the other of the end of the inner shaft (51) and the end of the outer shaft (52); the stator (10) is coaxially arranged with the magnetic reluctance rotor (30), and arranged, opposite the permanent magnet rotor (40), at an inner side or an outer side of the magnetic reluctance rotor (30), with the stator (10) comprising a stator iron core (11), and a main winding set (12) and an auxiliary winding set (13) wound on the stator iron core (11); and the driving device (20) is connected to the main winding set (12) and the auxiliary winding set (13) so as to respectively drive the main winding set (12) and the auxiliary winding set (13).

IPC Classes  ?

• H02K 16/02 - Machines with one stator and two rotors
• H02K 11/33 - Drive circuits, e.g. power electronics

Abstract

Disclosed are a washing machine and a control method therefor, wherein the washing machine comprises an inner drum (2); a pulsator (3); and a driving device (4), wherein the driving device (4) comprises a stator (41), a magnetic reluctance rotor (42) and a permanent magnet rotor (43), wherein the stator (41) comprises a first winding set (412) and a second winding set (413) which independently drive the magnetic reluctance rotor (42) and the permanent magnet rotor (43) to rotate respectively; and the magnetic reluctance rotor (42) and the permanent magnet rotor (43) independently drive the inner drum (2) and the pulsator (3) to rotate respectively.

IPC Classes  ?

• D06F 17/06 - Washing machines having receptacles, stationary for washing purposes, wherein the washing action is effected solely by circulation or agitation of the washing liquid by rotary impellers
• D06F 37/36 - Driving arrangements for rotating the receptacle at more than one speed
• H02K 16/02 - Machines with one stator and two rotors

Abstract

An air suction device (100) capable of generating an air flow, and a vacuum cleaner or range hood having same. The air suction device (100) capable of generating an air flow comprises: an air inlet module (1), comprising an air guide cavity (11) and a filter member; an air outlet module (2), which is connected to the air inlet module (1), an air outlet cavity (21) being formed within the air outlet module (2); and a drive means (3), provided within the air outlet module (2) and suitable for driving an air flow to flow from the air inlet module (1) to the air outlet module (2).

IPC Classes  ?

• F24C 15/20 - Removing cooking fumes
• F04D 29/70 - Suction grids; Strainers; Dust separation; Cleaning
• F04D 25/08 - Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
• F04D 29/30 - Vanes

Abstract

An exhaust fume collecting hood (10) for a range hood, and a range hood (100) having same, the exhaust fume collecting hood (10) comprising a shell (11) and a cleaning device (15). An air inlet and air outlet (1101) communicated with an air inlet cavity (1102) are formed on the shell (11), and a preset angle is formed between the air guide direction of the air inlet and the air guide direction of the air outlet (1101). The cleaning device (15) is provided on the shell (11) and opposite to the air inlet, and is suitable for spraying water or a cleaning solution into the shell (11).

IPC Classes  ?

• F24C 15/20 - Removing cooking fumes

Abstract

A range hood (100), comprising: a machine body (1), a fan system (2), an exhaust fume collecting hood (3), an oil storage box (4), an auxiliary fan, and a cleaning device (5). The exhaust fume collecting hood (3) comprises an inner hood (31) and an outer hood (32); an auxiliary air passage (33) is defined between the inner hood (31) and the outer hood (32); the oil storage box (4) is provided within the auxiliary air passage (33) and divides the auxiliary air passage (33) into an upper cavity (332) and a lower cavity (333); the auxiliary fan is provided within the lower cavity (333) to generate an air flow; the cleaning device (5) is used for cleaning the exhaust fume collecting hood (3).

IPC Classes  ?

• F24C 15/20 - Removing cooking fumes

Abstract

A range hood (100), comprising: a body (1), a fan system (2), a fume collecting hood (3), and an auxiliary fan. The fan system (2) is connected to the body (1) and is suitable for generating airflows. The fume collecting hood (3) defines an air duct (34) communicated with the fan system (2). The fume collecting hood (3) comprises an inner hood (31) and an outer hood (32) that are arranged at an interval. An auxiliary air duct (33) is defined between the inner hood (31) and the outer hood (32). The auxiliary fan is provided in the auxiliary air duct (33) to generate airflows.

IPC Classes  ?

• F24C 15/20 - Removing cooking fumes

Abstract

A centrifugal pump and an impeller (30) for a centrifugal pump (100). The impeller (30) comprises: an impeller base (31), provided with a drive connection portion which is configured to be connected to a drive device (40) of the centrifugal pump (100); and a plurality of blades (32), provided on the upper surface of the impeller base (31) and spaced apart from one another along the circumference of the impeller base (31); each blade (32) extends from a position adjacent to the center of the impeller base (31) to the edge of the impeller base (31); the upper end surface of at least one blade (32) has an outer end portion which is higher than an inner end portion thereof and comprises at least three mesas (320) which are sequentially connected to one another in the direction from inside to outside, any two connected mesas (320) not extending in the same plane.

IPC Classes  ?

• F04D 29/22 - Rotors specially for centrifugal pumps
• F04D 29/24 - Vanes
• F04D 29/42 - Casings; Connections for working fluid for radial or helico-centrifugal pumps