Abstract

Provided in the present application are a rotor core, a rotor assembly and an electric motor. The rotor core (10) comprises a plurality of core units (100) arranged around the axis of rotation of the rotor core (10), wherein one of the core units (100) is a first core unit (100a) that is disconnected from all other core units in a circumferential direction along the axis of rotation; the first core unit (100a) comprises a plurality of laminations (110) stacked in a direction parallel to the axis of rotation; one of the laminations (110) is a first lamination (110a) that comprises a first side edge (111a) and a second side edge (112a) arranged opposite each other in the circumferential direction along the axis of rotation; a first protrusion (1111a) is provided at one end of the first side edge (111a) close to the axis of rotation; and the first protrusion (1111a) comprises an abutting portion (11111a) and a spacing portion (11112a), the spacing portion (11112a) being connected between the abutting portion (11111a) and the first side edge (111a), and the spacing portion (11112a) being configured to define a first gap (130) together with a permanent magnet (210).

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

Abstract

11111.

IPC Classes  ?

• H02K 1/276 - Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
• H02K 1/27 - Rotor cores with permanent magnets

Abstract

The present application provides a rotor core, a rotor assembly, and a motor. The rotor core (50) comprises multiple core units arranged around the rotation axis of the rotor core (10); an accommodating space (120) is defined between every two adjacent core units, and the accommodating space is used for accommodating a permanent magnet; one of the core units is a first core unit (100), and in the circumferential direction of the rotation axis, the first core unit (100) is disconnected from the remaining core units; the first core unit (100) comprises multiple laminations stacked in a direction parallel to the rotation axis, and one of the laminations is a first lamination (110); and a first recess (111) recessed in a direction away from the rotation axis is provided on the side of the first lamination (110) facing the rotation axis.

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

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

The present application relates to the technical field of motors, and provides a rotor assembly and a motor. The rotor assembly comprises: a first punching sheet, comprising M first iron core parts, the M first iron core parts being distributed at intervals around an axis of the first punching sheet on the same plane, and a first slot being enclosed between every two adjacent first iron core parts; inner convex parts, which are provided on the first iron core parts, the inner convex parts on two adjacent first iron core parts enclosing to define a first notch of a first slot; a second punching sheet, comprising M second iron core parts, the M second iron core parts being distributed at intervals around an axis of the second punching plate on the same plane, a second slot being enclosed between every two adjacent second iron core parts, and the first punching sheet and the second punching sheet being stacked into a rotor iron core; outer expanding parts, which are provided on the second iron core parts, the outer expanding parts on two adjacent second iron core parts enclosing to define a second notch of a second slot; and permanent magnets, which are arranged in the first slots and the second slots.

IPC Classes  ?

• H02K 1/278 - Surface mounted magnetsInset magnets
• H02K 1/28 - Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures

Abstract

A motor, a power assembly and a power-assisted bicycle are provided. The motor includes a housing, a stator assembly and a busbar assembly. The housing is internally formed with a cavity, and is provided with a wire passing hole. The stator assembly is disposed in the cavity and interference-connected to an inner wall of the housing. The busbar assembly is mounted at one end of the stator assembly in an axial direction, and is provided with a three-phase connection terminal penetrating through the wire passing hole. A resin material is filled between the stator assembly and the housing. The busbar assembly is further provided with a boss base mounted in the wire passing hole in a sealing manner. The three-phase connection terminal is mounted on the boss base.

IPC Classes  ?

• H02K 3/52 - Fastening salient pole windings or connections thereto
• B62M 6/40 - Rider propelled cycles with auxiliary electric motor

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 core assembly, a stator, and a motor. The stator core assembly comprises a core component (100) and an insulating frame chain (200). The core component (100) comprises a plurality of cores (110), and the insulating frame chain (100) comprises a plurality of insulating frames (210) connected in sequence. Each core (110) comprises a yoke part (120), a tooth part (130) and a pole piece part (140) which are connected. The pole piece part (140) is arranged at the end of the tooth part (130) facing away from the yoke part (120). The insulating frame (210) is provided with a penetrating cavity (211), and the tooth part (130) is arranged in the penetrating cavity (211).

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 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 control method for a fan, a fan, a household appliance, and a computer-readable storage medium are provided. The fan includes an electric motor. The control method includes: controlling the electric motor to start to operate through a d-axis current command in response to a start command; obtaining an actual speed of the electric motor, and starting timing when the actual speed reaches a first target speed; and decreasing, when the timed duration reaches a first preset duration, a d-axis current corresponding to the d-axis current command until the d-axis current is decreased to 0, and increasing a q-axis current corresponding to a q-axis current command until the q-axis current is increased to a first target current.

IPC Classes  ?

• H02P 21/34 - Arrangements for starting
• H02P 21/18 - Estimation of position or speed

Abstract

A control method for an electric motor, an electric motor, and a computer-readable storage medium are provided. According to the method, in a current control cycle, a first theoretical sector corresponding to a voltage vector of an electric motor is determined; in the previous control cycle of the current control cycle, a first sector corresponding to the voltage vector is obtained; a target control cycle in multiple historical control cycles which precede the current control cycle is determined, and an interval duration between the target control cycle and the current control cycle is determined; a target sector corresponding to the voltage vector in the current control cycle based on the first theoretical sector, the first sector, and the interval duration is determined; and a corresponding driving signal based on the target sector is generated, and the electric motor is driven to operate based on the driving signal.

IPC Classes  ?

• H02P 21/22 - Current control, e.g. using a current control loop
• H02P 21/18 - Estimation of position or speed
• H02P 27/12 - 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 with pulse width modulation pulsing by guiding the flux vector, current vector or voltage vector on a circle or a closed curve, e.g. for direct torque control

Abstract

Disclosed is a connector. The connector includes a body, a wiring terminal, and a wire fixing component. The body has a terminal hole. The terminal hole has a first end and a second end. A wiring terminal is fitted in the terminal hole. The wire fixing component is detachably connected to the body and is located at the first end of the terminal hole. The wire fixing component has at least one wire passing groove. The at least one wire passing groove is aligned with the terminal hole along an axial direction of the terminal hole, and the wiring terminal abuts against the wire fixing component to prevent the wiring terminal from entering the at least one wire passing groove.

IPC Classes  ?

• H01R 13/35 - Contact members for non-simultaneous co-operation with different types of contact member, e.g. socket co-operating with either round or flat pin
• H02K 5/22 - Auxiliary parts of casings not covered by groups , e.g. shaped to form connection boxes or terminal boxes
• H02K 11/33 - Drive circuits, e.g. power electronics

Abstract

Disclosed in the present application are an electric motor and an electrical device. The electric motor comprises a stator assembly (100), an end cover and a wire fixing clamp (600). The stator assembly (100) comprises a plastic package housing (110), wherein the end of the plastic package housing (110) in the axial direction of the stator assembly (100) is opened to form an opening, the end surface of the plastic package housing (110) located at the opening is a first end surface (131), and a side wall of the plastic package housing (110) is provided with a wire passing groove (140), which extends, from the first end surface, in the axial direction of the stator assembly (100); the end cover covers the opening; and the wire fixing clamp (600) is an elastic member and is arranged in the wire passing groove (140) for fixing a wire, the end surface of the wire fixing clamp (600) facing the end cover is a second end surface (610), and the second end surface (610) protrudes, in the axial direction of the stator assembly (100), relative to the first end surface (131), such that the wire fixing clamp (600) is deformed by means of being pressed by the end cover, so as to seal the wire passing groove (140).

IPC Classes  ?

• H02K 5/10 - Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. of water or fingers

Abstract

A motor control method and a motor control apparatus, a motor controller, and a storage medium. The method comprises: during a process of controlling a motor to run at a constant power, acquiring a feedback rotation speed of the motor (S1); when it is determined that the feedback rotation speed is higher than a first rotation speed threshold, acquiring a rotation speed loop control amount according to a second rotation speed threshold and the feedback rotation speed, wherein the second rotation speed threshold is greater than the first rotation speed threshold (S2); and when it is determined that the feedback rotation speed is higher than the second rotation speed threshold, by using the second rotation speed threshold as a given amount of the rotation speed loop and using the rotation speed loop control amount as an initial control amount of the rotation speed loop, controlling the motor to run at a constant rotation speed (S3).

IPC Classes  ?

• H02P 23/00 - Arrangements or methods for the control of AC motors characterised by a control method other than vector control
• H02P 23/14 - Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage
• 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

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

An impeller, a drainage pump, and an indoor unit of an air conditioner are provided. The impeller has an impeller shaft and a circular disc. Long blades are fixedly connected to the impeller shaft and extend outward along a radial direction of the impeller shaft. The circular disc has a plate-shaped structure sleeved on an outer circumference of the impeller shaft. The plate-shaped structure is provided with at least one balance through hole communicating front and rear sides of the plate-shaped structure.

IPC Classes  ?

• F04D 29/22 - Rotors specially for centrifugal pumps
• F04D 13/06 - Units comprising pumps and their driving means the pump being electrically driven
• F04D 29/42 - CasingsConnections for working fluid for radial or helico-centrifugal pumps

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

A transmission assembly, an electric motor, and an electric bicycle. The transmission assembly (1000) comprises a crankshaft (100), wherein a one-way clutch (200) and a cadence sensor (300) are arranged on the crankshaft (100), a magnetic ring (310) is arranged on a first outer ring (210) of the one-way clutch (200), and the first outer ring (210) is connected to the crankshaft (100), so that the magnetic ring (310) can rotate synchronously with the crankshaft (100); and a magnetic induction device (320) is fixedly mounted and is arranged spaced apart from the magnetic ring (310).

IPC Classes  ?

• H02K 11/215 - Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
• B62M 6/50 - Control or actuating devices therefor characterised by detectors or sensors, or arrangement thereof

Abstract

A motor, a power assembly, and a power-assisted bicycle. The motor comprises a housing (300), a stator assembly (200), and a busbar assembly (100). A cavity is formed inside the housing (300). The housing (300) is provided with a wire passing hole (320). The stator assembly (200) is provided in the cavity and is connected to the inner wall of the housing (300) in an interference fitting manner. The busbar assembly (100) is mounted at one end of the stator assembly (200) in an axial direction and is provided with a three-phase connecting terminal (150) penetrating through the wire passing hole (320). A position between the stator assembly (200) and the housing (300) is filled with a resin material (310). Moreover, the busbar assembly (100) is further provided with a boss base (170) sealedly provided in the wire passing hole (320), and the three-phase connecting terminal (150) is mounted on the boss base (170).

IPC Classes  ?

• H02K 3/50 - Fastening of winding heads, equalising connectors, or connections thereto
• H02K 1/12 - Stationary parts of the magnetic circuit
• H02K 5/24 - CasingsEnclosuresSupports specially adapted for suppression or reduction of noise or vibrations
• H02K 9/22 - Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges

Abstract

A hub motor and an electric vehicle; the hub motor comprises a central shaft (100) and, connected to the central shaft, a housing assembly (200), a stator assembly (300), a rotor assembly (400), and a gear assembly (500); the housing assembly (200) and the rotor assembly (400) are both supported on the central shaft (100) by means of bearings (110); the stator assembly (300) comprises a stator core (320) and a winding (310); the stator core (320) has a closed yoke (322), the outer periphery of the yoke (322) is provided with a plurality of teeth (321), the winding (310) is wound on the teeth (321), and aluminum wire is used for the winding (310); the rotor assembly (400) is provided with a permanent magnet (440), and the material of the permanent magnet (440) is ferrite; and the rotor assembly (400) is in transmission connection with the housing assembly (200) by means of the gear assembly (500).

IPC Classes  ?

• H02K 1/2786 - Outer rotors
• H02K 3/00 - Details of windings
• B62M 11/16 - Transmissions characterised by use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio with planetary gears built in, or adjacent to, the ground-wheel hub
• B60K 7/00 - Disposition of motor in, or adjacent to, traction wheel
• 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 3/52 - Fastening salient pole windings or connections thereto

Abstract

An in-wheel motor and an electric bicycle. The in-wheel motor (104) comprises a central shaft (203), a housing (202), a motor (201) and a speed reduction mechanism, wherein the motor (201) comprises a rotor (207) and a stator (206); the stator (206) is fixedly connected to the central shaft (203); the rotor (207) is rotationally connected to the central shaft (203) by means of a third bearing; the speed reduction mechanism comprises a primary planetary speed reduction system and a secondary planetary speed reduction system; the primary planetary speed reduction system comprises a first sun gear (301), a first gear ring (302), first planetary gears (303) and a first planetary carrier (304); the first sun gear (302) is connected to the rotor (207); the first gear ring (302) is fixed to the housing (202); the second planetary speed reduction system comprises a second sun gear (305), a second gear ring (306), second planetary gears (307) and a second planetary carrier (308); the second sun gear (305) is fixedly connected to the first planetary carrier (304); the second gear ring (306) is fixed to the housing (202); and the second planetary carrier (308) is fixedly connected to the central shaft (203).

IPC Classes  ?

• H02K 3/04 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
• H02K 5/16 - Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
• H02K 3/28 - Layout of windings or of connections between windings
• H02K 7/116 - Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
• H02K 7/10 - Structural association with clutches, brakes, gears, pulleys or mechanical starters
• B62M 7/12 - Motorcycles characterised by position of motor or engine with the engine beside or within the driven wheel

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 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

A stator assembly, a hub motor and an electric vehicle; the stator assembly (300) comprises a stator core (320), a stator frame (330), a support bracket (340) and a Hall plate (350); the stator core (320) has a closed yoke, the outer periphery of the yoke is provided with a plurality of teeth, a winding (310) is connected to the teeth, the stator frame (330) is fixedly connected to the stator core (320), and the stator frame (330) is disposed in the yoke; the support bracket (340) is connected to the stator frame (330), the support bracket (340) is provided with at least one Hall plate mount (341), the Hall plate (350) is connected to the Hall plate mount (341), the Hall plate (350) is connected to at least one Hall sensor (351), and the Hall sensor (351) is located on the outer side of the winding (310) along the radial direction of the stator core (320).

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

Abstract

The present application provides a connecting assembly and a motor. The connecting assembly comprises a first shell; a contact pin provided on the first shell; a second shell detachably connected to the first shell, the contact pin being inserted into the second shell; and a connecting line provided on the second shell and connected to the contact pin. According to the present application, the contact pin and the first shell which can be connected to an internal electrical structure of the motor are arranged, the second shell detachably connected to the first shell is provided in a matched mode, and the connecting line synchronously connecting the contact pin is provided in the second shell. The process steps of welding the connecting line and a winding are omitted. Compared with the welding process, the plug-in connection structure can omit a large amount of labor cost, and can remarkably shorten the production time, such that the technical problems of high welding labor cost and low efficiency are solved.

IPC Classes  ?

• H02K 5/22 - Auxiliary parts of casings not covered by groups , e.g. shaped to form connection boxes or terminal boxes
• H02K 11/00 - Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
• H01R 13/40 - Securing contact members in or to a base or caseInsulating of contact members

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 closed-loop switching method and apparatus for an electric motor, and an electronic device and a storage medium, wherein the method comprises: testing a zero-crossing signal of a back-electromotive force signal of an electric motor (S101); determining whether an interference signal exists in the zero-crossing signal (S102); if it is identified that the interference signal exists, performing closed-loop switching according to a target switching policy (S103); and if it is identified that the interference signal does not exist, directly using a first preset rotation speed as an initial speed of the electric motor after same is switched to a closed-loop operation stage (S104). By means of the method, anti-interference processing can be performed after an interference signal is detected, thereby avoiding the influence of the interference signal on a testing result of a zero-crossing signal, and thus also weakening the influence of the interference signal on a closed-loop switching operation, so that an electric motor can switch to a closed-loop stage more reliably, and in particular, the starting reliability of the electric motor in a strong magnetic field environment is enhanced.

IPC Classes  ?

• H02P 6/182 - Circuit arrangements for detecting position without separate position detecting elements using back-emf in windings

Abstract

A rotor, a motor, and a household appliance. The rotor comprises a rotating shaft (100), an iron core (200), an end ring (300), a magnet (400), and a shielding member (500). The iron core (200) is arranged around an outer peripheral wall of the rotating shaft (100), the end ring (300) is located at one end of the iron core (200) along an axial direction of the rotating shaft (100), and an end portion of the end ring (300) distant from the iron core (200) is provided with a groove (310). The magnet (400) is mounted at the groove (310). The shielding member (500) is made of a magnetically conductive material, and the shielding member (500) is mounted at the groove (310) and is located at a side of the magnet (400) facing the iron core (200).

IPC Classes  ?

• H02K 11/215 - Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
• H02K 13/00 - Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windingsDisposition of current collectors in motors or generatorsArrangements for improving commutation
• H02K 17/16 - Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors

Abstract

A rotor, a motor, and a household appliance. The rotor comprises a rotating shaft (100), an iron core (201), an end ring (300), a magnet (400), and a shielding component (500); the iron core (201) is wound on the outer peripheral wall of the rotating shaft (100), the end ring (300) is located at one end of the iron core (201) in the axial direction of the rotating shaft (100), and a groove (310) is formed in the end portion of the end ring (300) away from the iron core (201); the magnet (400) is mounted in the groove (310); the shielding component (500) is made of a magnetically conductive material, and the shielding component (500) is mounted in the groove (310) and located on the side of the magnet (400) facing the iron core (201).

IPC Classes  ?

• H02K 11/215 - Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
• H02K 13/00 - Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windingsDisposition of current collectors in motors or generatorsArrangements for improving commutation
• H02K 17/16 - Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors

Abstract

The present application provides a fan control method, a fan, a household appliance, and a readable storage medium. The fan comprises a motor. The control method comprises: in response to a start instruction, controlling, by means of a d-axis current instruction, the motor to start running; obtaining an actual rotational speed of the motor, and starting timing when the actual rotational speed reaches a first target rotational speed; and when a timing duration reaches a first preset duration, reducing a d-axis current corresponding to the d-axis current instruction, until the d-axis current is reduced to 0, and increasing a q-axis current corresponding to a q-axis current instruction, until the q-axis current is increased to a first target current. According to embodiments of the present application, the stable starting and operation of the motor can be ensured, the vibration and noise during the operation of the fan can be reduced, and air volume noise generated when the fan is started at a small air volume can be reduced, thereby effectively improving use comfort of a user.

IPC Classes  ?

• H02P 21/34 - Arrangements for starting

Abstract

An electric motor and an electrical appliance. The electric motor (1000) comprises a housing, a rotor assembly (200), a stator assembly (100) disposed in the housing, and an end cover (300). The end cover (300) is connected to the housing to form a cavity used for accommodating the rotor assembly (200). The rotor assembly (200) is rotatably arranged in the cavity. A plurality of mounting bases (310) protruding outwards are arranged along the outer periphery of the end cover (300). The mounting bases (310) are connected to the end cover (300) and have mounting holes. The space between each mounting base (310) and the end cover (300) is hollowed out to form through holes (321). A plurality of heat dissipation ribs (121) are arranged at intervals at the outer side of the housing along the circumferential direction of the housing.

IPC Classes  ?

• H02K 5/04 - Casings or enclosures characterised by the shape, form or construction thereof
• H02K 5/20 - Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
• H02K 5/18 - Casings or enclosures characterised by the shape, form or construction thereof with ribs or fins for improving heat transfer
• H02K 1/27 - Rotor cores with permanent magnets

Abstract

Provided in the present application are an electric motor control method, an electric motor, and a readable storage medium. The electric motor control method comprises: determining, in the current control cycle, a first theoretical sector corresponding to a voltage vector of an electric motor; acquiring, in the previous control cycle of the current control cycle, a first sector corresponding to the voltage vector; determining a target control cycle in a plurality of historical control cycles which precede the current control cycle, and determining an interval duration between the target control cycle and the current control cycle; determining a target sector corresponding to the voltage vector in the current control cycle according to the first theoretical sector, the first sector, and the interval duration; and generating a corresponding driving signal according to the target sector, and by means of the driving signal, driving the electric motor to operate. By means of the embodiments of the present application, the phase current distortion of single resistance sampling during switching between sectors of voltage vectors can be suppressed, current harmonics are reduced, and the operation noise of an electric motor is effectively reduced, thereby improving the user experience.

IPC Classes  ?

• H02P 27/12 - 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 with pulse width modulation pulsing by guiding the flux vector, current vector or voltage vector on a circle or a closed curve, e.g. for direct torque control

Abstract

Disclosed is a connector. The connector comprises a body, a wiring terminal and a wire fixing component, wherein the body is provided with a terminal hole; the terminal hole is provided with a first end and a second end; the wiring terminal is fitted in the terminal hole; the wire fixing component is detachably connected to the body and located at the first end of the terminal hole; the wire fixing component is provided with a wire passing groove; the wire passing groove is aligned with the terminal hole in the axial direction of the terminal hole; and the wiring terminal abuts against the wire fixing component to prevent the wiring terminal from entering the wire passing groove. The connector of the present disclosure has the characteristics of a simple structure, a strong reliability and an effective anti-dropping performance.

IPC Classes  ?

• H01R 13/426 - Securing in a demountable manner by separate resilient retaining piece supported by base or case, e.g. collar
• H01R 13/432 - Securing in a demountable manner by resilient locking means on the contact membersSecuring in a demountable manner by locking means on resilient contact members by stamped-out resilient tongue snapping behind shoulder in base or case
• H01R 13/436 - Securing a plurality of contact members by one locking piece

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 impeller, a drainage pump, and an air-conditioning indoor unit. The impeller (10) comprises: an impeller shaft (11); long blades (12) that are fixedly connected to the impeller shaft (11) and extend outward in the radial direction of the impeller shaft (11); and a disk (13) comprising a plate-shaped structure (131), the plate-shaped structure (131) being sleeved on the periphery of the impeller shaft (11), and at least one balancing through hole (16) that communicates the front side with the rear side of the plate-shaped structure (131) being formed in the plate-shaped structure (131). By forming at least one balancing through hole (16) in the plate-shaped structure (131), when water and air are suctioned into a cavity of the impeller together, the air can be discharged out of the cavity through the balancing through hole (16), vibration of the impeller (10) caused by a pressure difference during operation can be reduced, and therefore, noise generated of the impeller (10) during operation can be reduced.

IPC Classes  ?

• F04D 29/20 - Mounting rotors on shafts
• F04D 29/22 - Rotors specially for centrifugal pumps
• F04D 29/24 - Vanes
• F04D 29/66 - Combating cavitation, whirls, noise, vibration, or the likeBalancing
• F24F 13/22 - Means for preventing condensation or evacuating condensate

Abstract

The present application provides a motor brush, a motor, and a washing machine. The motor brush comprises: a brush bracket capable of defining an accommodating cavity and provided with a first securing portion; a brush, a part of the brush being located within the accommodating cavity, the brush being provided with a second securing portion, and the first securing portion and the second securing portion being assembled in a fitted manner, so that the brush is secured onto the brush bracket. By means of the technical solution of the present application, on the premise of ensuring the reliability of the motor brush, the structural arrangement can be simplified, and the mounting procedures can be reduced, thereby optimizing the manufacturing process of the motor brush.

IPC Classes  ?

• H02K 5/00 - CasingsEnclosuresSupports