A controller controls a conversion circuit of an n-phase motor based on updated n-phase duty command values. When the controller predicts that voltage fluctuations of first-phase and second-phase terminals connected to the motor occur in the same direction and at the same timing based on a current update value of the n-phase duty command value, it shifts the occurrence timing of the voltage fluctuation of the first-phase terminal determined by the current update value in a first direction by a first time, shifts the occurrence timing of the voltage fluctuation of the remaining terminal determined by the current update value in the first direction by a third time, and shifts the occurrence timing of the voltage fluctuation of the second-phase terminal determined by the next update value or the previous update value of the n-phase duty command value in a direction opposite to the first direction by a second time.
H02P 27/08 - 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
2.
ESTIMATION DEVICE, ESTIMATION METHOD, AND ESTIMATION PROGRAM
An estimation device according to one aspect of the present disclosure comprises a substitution unit and a calculation unit. The substitution unit substitutes the respective values of position, time, and temperature into an equation representing the relationship among a dimensionless first variable, the value of which is determined by the temperature of a member having a pipe structure including a fluid therein, a dimensionless second variable, the value of which is determined by the position with respect to a reference point in the member, and a dimensionless third variable, the value of which is determined by the thermal diffusivity of the member and time. The calculation unit calculates the thermal diffusion value the basis of the equation into which the values have been substituted by the substitution unit.
G01N 25/18 - Investigating or analysing materials by the use of thermal means by investigating thermal conductivity
F28D 15/02 - Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls in which the medium condenses and evaporates, e.g. heat-pipes
3.
MOTOR CONTROL DEVICE, MOTOR MODULE, MOTOR CONTROL METHOD, AND MOTOR CONTROL PROGRAM
A motor control device according to one aspect of the present disclosure comprises a reception unit, a detection unit, and a control unit. The reception unit receives a switching of a travel mode from a first mode in which overmodulation control is performed to a second mode in which non-overmodulation control is performed. The detection unit detects the speed of the motor. The control unit decreases the modulation rate of the overmodulation control so as to decelerate the speed at a predetermined reduction rate when the switching is received by the reception unit in a state in which overmodulation control is performed while the speed exceeds an upper limit speed of the second mode in the first mode, and performs non-overmodulation control by setting the modulation factor to 1 or less and starts flux weakening control when the speed is equal to or less than the upper limit speed of the second mode.
H02P 21/22 - Current control, e.g. using a current control loop
H02P 27/08 - 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
4.
CONTROL DEVICE, MOTOR UNIT, DRIVE DEVICE, MOVING BODY, CONTROL METHOD, AND PROGRAM
One aspect of a control device according to the present invention controls, by pulse width modulation control, a motor having a magnet-embedded rotor, said control device comprising a model following control part which constrains the transfer function of an electric circuit part of a motor that includes a coil to a nominal model based on the electric circuit part. A motor voltage is input to the electric circuit part. The model following control part is configured to generate a correction voltage value for correcting a command value of the motor voltage on the basis of the nominal model and a motor current which flows in the electric circuit part and to constrain the transfer function of the electric circuit part to the transfer function of the nominal model in a frequency band in which gain in the gain characteristics of a complementary sensitivity function with respect to a modeling error between the electric circuit part and the nominal model is substantially 1.
This spindle motor comprises a shaft, a base part, a stator, a rotor, and a bearing part. The shaft extends along a central axis extending in the vertical direction. The base part has a shaft insertion hole into which a lower end part of the shaft is inserted. The stator is disposed on the upper surface of the base part and is annular, surrounding the shaft. The rotor rotates about the central axis. The bearing part rotatably supports the rotor with the shaft as the central axis. The bearing part has a sleeve. The sleeve has a sleeve insertion hole into which the shaft is inserted, and is cylindrical, extending in the axial direction so as to cover the outer circumferential surface of the shaft. The rotor has a rotor cylinder part and a magnet. The rotor cylinder part surrounds the sleeve and extends in the axial direction. The magnet faces the stator in the radial direction. The outermost diameter of the shaft is between 0.1700 times and 0.1922 times, inclusive, the outer diameter of the rotor cylinder part.
Nidec Taiwan Corporation (Taiwan, Province of China)
NIDEC CORPORATION (Japan)
Inventor
Ngo, Huu-Tich
Yan, Guo-Jhih
Abstract
One aspect of an electric actuator of the present disclosure includes: a motor portion having a rotor rotatable about a motor shaft extending in an axial direction and a stator facing the rotor with a gap interposed therebetween; a reduction gear that decelerates and outputs rotation of the rotor; a brake device that brakes rotation of the rotor; and a position detector that detects a position change of the rotor. The brake device includes: a first brake portion that is a magnetic material disposed on one side in an axial direction of a rotor and is movable in an axial direction between a braking position for braking rotation of the rotor and a non-braking position away from the braking position to one side in the axial direction; a second brake portion that rotates in synchronization with the rotor, is in contact with the first brake portion at the braking position, and is in non-contact with the first brake portion at the non-braking position; and a solenoid that switches the position of the first brake portion between the braking position and the non-braking position according to an energized state. The reduction gear, the brake device, the motor portion and the position detector are sequentially arranged in the axial direction from one side in the axial direction.
H02K 7/102 - Structural association with clutches, brakes, gears, pulleys or mechanical starters with friction brakes
H01F 7/08 - ElectromagnetsActuators including electromagnets with armatures
H02K 7/00 - Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
H02K 11/21 - Devices for sensing speed or position, or actuated thereby
Nidec Taiwan Corporation (Taiwan, Province of China)
NIDEC CORPORATION (Japan)
Inventor
Ngo, Huu-Tich
Yan, Guo-Jhih
Wu, Keng-Chang
Abstract
An electric actuator includes a motor portion including a rotor rotatable about a motor shaft and a stator opposing the rotor, a reduction gear to decelerate and output rotation of the rotor, a brake to brake rotation of the rotor, a position detector to detect a position change of the rotor, and a cover that accommodates the motor portion. The reduction gear, the brake, the motor portion, and the position detector are sequentially arranged in an axial direction from one side in the axial direction. The brake includes a first brake portion that includes a magnetic material; and a second brake portion that rotates in synchronization with the rotor, is in contact with the first brake portion at a braking position, and is in non-contact with the first brake portion at the non-braking position, and a solenoid.
An angle detection device includes a sensor magnet on a shaft of an N-phase motor having a rotor magnet, M magnetic sensors detecting a magnetic flux change due to rotation of the sensor magnet, a storage device storing an expression representing a relationship between an output value of the M magnetic sensors and a mechanical angle of the shaft corresponding to a rotational position of the rotor magnet as a level switching angle, and a processing device calculating the mechanical angle based on the output value and the expression, and outputting an N-phase pulse signal having a phase difference of 360 degrees divided by N in terms of electrical angle based on the calculated mechanical angle and the level switching angle. The processing device switches a level of a pulse signal of any one phase of the N-phase pulse signal when the calculated mechanical angle matches the level switching angle.
G01D 5/14 - Mechanical means for transferring the output of a sensing memberMeans 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 convertingTransducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
A motor includes a rotor, a stator, a housing, an acceleration sensor, and controller. The rotor is rotatable about a central axis extending in an axial direction. The stator is operable to drive the rotor. The housing accommodates the rotor and the stator. The acceleration sensor is operable to detect acceleration applied to the housing. The controller is configured or programmed to control energization to the stator. Based on a detection result of the acceleration sensor, the controller is configured or programmed to perform a rotation speed change of any of a rotation start of the rotor, at least one of an increase and a decrease of a rotation speed, and a rotation stop.
F04D 25/06 - Units comprising pumps and their driving means the pump being electrically driven
A41D 13/002 - Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches with controlled internal environment
A motor according to an aspect of the present invention includes a rotor rotatable around a center axis and a stator located on one side of the rotor in an axial direction. The stator includes a plurality of magnetic poles facing an end surface of the rotor on the one side in the axial direction. The rotor includes a rotor body having an annular shape and including at least one magnet, a rotor frame including a plurality of arms extending in a radial direction, and a first cover fixed to the rotor frame. The at least one magnet has, at least in part or in whole, a magnetization direction in the axial direction. The plurality of arms are located on the other side of the rotor body in the axial direction. The first cover is configured to cover at least part of a surface of the at least one magnet, the surface facing the one side in the axial direction.
A motor according to an aspect of the present invention includes a rotor rotatable around a center axis and a stator located on one side of the rotor in an axial direction. The stator includes a plurality of magnetic poles facing an end surface of the rotor on the one side in the axial direction. The rotor includes a rotor body having an annular shape and including at least one magnet, a rotor frame including a plurality of arms extending in a radial direction, and a first cover fixed to the rotor frame. The at least one magnet has, at least in part or in whole, a magnetization direction in the axial direction. The plurality of arms are located on the other side of the rotor body in the axial direction. The first cover is configured to cover at least part of a surface of the at least one magnet, the surface facing the one side in the axial direction.
H02K 1/2798 - Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets where both axial sides of the stator face a rotor
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
H02K 5/18 - Casings or enclosures characterised by the shape, form or construction thereof with ribs or fins for improving heat transfer
H02K 21/24 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
One aspect of an information processing device according to the present invention comprises: a hard disk drive; a processing device that accesses the hard disk drive; a plurality of fan devices that cool the processing device; and a control device that controls the plurality of fan devices. The control device acquires an error rate of the hard disk drive while changing the number of rotations of the plurality of fan devices under a condition in which the average air volume of the plurality of fan devices is a first air volume, and controls the number of rotations of the plurality of fan devices on the basis of a first combination which, among combinations of the number of rotations of the plurality of fan devices, makes the error rate equal to or less than a threshold value.
A motor according to an aspect of the present invention includes a rotor rotatable around a center axis and a stator located on one side of the rotor in an axial direction. The stator includes a plurality of magnetic poles facing an end surface of the rotor on the one side in the axial direction. The rotor includes a rotor body having an annular shape and including at least one magnet, a rotor frame including a plurality of arms extending in a radial direction, and a first cover fixed to the rotor frame. The at least one magnet has, at least in part or in whole, a magnetization direction in the axial direction. The plurality of arms are located on the other side of the rotor body in the axial direction. The first cover is configured to cover at least part of a surface of the at least one magnet, the surface facing the one side in the axial direction.
H02K 1/2798 - Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets where both axial sides of the stator face a rotor
H02K 5/15 - Mounting arrangements for bearing-shields or end plates
A motor according to an aspect of the present invention includes a rotor rotatable around a center axis and a stator located on one side of the rotor in an axial direction. The stator includes a plurality of magnetic poles facing an end surface of the rotor on the one side in the axial direction. The rotor includes a rotor body having an annular shape and including at least one magnet, a rotor frame including a plurality of arms extending in a radial direction, and a first cover fixed to the rotor frame. The at least one magnet has, at least in part or in whole, a magnetization direction in the axial direction. The plurality of arms are located on the other side of the rotor body in the axial direction. The first cover is configured to cover at least part of a surface of the at least one magnet, the surface facing the one side in the axial direction.
H02K 1/18 - Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
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
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
A motor according to an aspect of the present invention includes a rotor rotatable around a center axis and a stator located on one side of the rotor in an axial direction. The stator includes a plurality of magnetic poles facing an end surface of the rotor on the one side in the axial direction. The rotor includes a rotor body having an annular shape and including at least one magnet, a rotor frame including a plurality of arms extending in a radial direction, and a first cover fixed to the rotor frame. The at least one magnet has, at least in part or in whole, a magnetization direction in the axial direction. The plurality of arms are located on the other side of the rotor body in the axial direction. The first cover is configured to cover at least part of a surface of the at least one magnet, the surface facing the one side in the axial direction.
H02K 16/02 - Machines with one stator and two rotors
H02K 1/18 - Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
H02K 1/2798 - Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets where both axial sides of the stator face a rotor
H02K 7/00 - Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
One embodiment of a pump according to the present disclosure comprises a rotor, a stator, a pump part, and a housing. The housing has a partition part that partitions an internal space. The partition part has a lid part that covers the rotor from the other side in the axial direction, a first cylindrical part that has a cylindrical shape centered on a central axis and that is positioned between the rotor and the stator in the radial direction, and a bottom part that spreads outward in the radial direction from the end on one side in the axial direction of the first cylindrical part and that is positioned between the pump part and the stator in the axial direction. The bottom part has a first surface facing the stator in the axial direction, and a second surface facing the pump part in the axial direction. The first surface is provided with a first rib extending in the radial direction between coils that are adjacent in the circumferential direction. The second surface is provided with a groove that overlaps the first rib and extends in the radial direction when viewed from the axial direction.
One aspect of an air blowing system according to the present invention comprises a plurality of fan devices that share a communication bus. Each of the plurality of fan devices includes a first fan device having first software and a second fan device having second software. The first fan device and the second fan device each execute: first processing for acquiring a random number; second processing for generating an address and a first waiting time of the device on the basis of the random number; third processing for starting measurement of time; and fourth processing for determining the device as a master when the time reaches the first waiting time without receiving access from another device that shares the communication bus. The first fan device, in the second processing, generates an address that satisfies a first condition as the address of the device. The second fan device, in the second processing, generates an address that satisfies a second condition as the address of the device.
G06F 13/14 - Handling requests for interconnection or transfer
G06F 13/36 - Handling requests for interconnection or transfer for access to common bus or bus system
H02P 5/46 - Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors for speed regulation of two or more dynamo-electric motors in relation to one another
19.
CONTROL DEVICE, PUMP UNIT, AND REFRIGERANT CIRCULATION DEVICE
A control device includes a first connector to which an external device including a power supply is attachable or detachable, a power supply path to connect a load device and the first connector and through which a DC voltage is supplied when the first connector is connected to the external device, a load switch to switch between connection and disconnection, a protection circuit to prevent inrush current, and a control circuit to detect that the first connector is connected to the external device, and then output a drive signal to switch the load switch from disconnection to connection. The protection circuit includes a capacitor and is configured to switch the load switch from disconnection to connection over a predetermined first time period during which the load switch is gradually transitioned from off to on by the drive signal based on the charging time of the capacitor.
H02H 3/093 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess current with timing means
H02H 7/085 - 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 normal working conditions for dynamo-electric motors against excessive load
H02H 9/00 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
A stator 200 includes a stator core 210. The stator core 210 includes a cylindrical core back 500 extending in an axial direction AD, and teeth 600 extending in a radial direction RD from the core back 500. The core back 500 includes recesses 510 recessed from a surface 501 on one side in the radial direction RD toward the other side in the radial direction RD. The teeth 600 each include: a body part 610; and a protrusion 620 protruding from the body part 610, from the one side in the radial direction RD toward the other side in the radial direction RD . The protrusion 620 is positioned inside the recess 510, and includes a plastic deformation part 621 that plastically deforms inside the recess 510 and contacts the core back 500.
A system and method for closed-loop startup for a sensorless permanent magnet motor drive are disclosed. The drive provides an output current to a motor. A closed-loop startup subsystem includes a proportional integral closed-loop controller determining an optimal current command to maintain synchronization of the motor during a change in speed. The controller is configured to determine a power difference between an actual motor power output and an ideal motor power output, determines the optimal electric current command based on the power difference, and apply the optimal electric current command to adjust the output current to reduce the power difference. The controller may include an acceleration feedforward mechanism configured to determine and add an acceleration feedforward current component to the output electric current to compensate for the effects of inertia and friction. Additionally, for each torque current command applied, the controller may add a q-axis current offset.
One aspect of a control device of the present invention is a control device that includes a motor and controls the steering mechanism mounted on a vehicle. The control device includes an assist control unit that generates an instruction torque to be input to the motor. The assist control unit generates the instruction torque in consideration of a mechanical characteristic of an arm of a steering person.
A control device controls an N-phase inverter when N is an integer of three or more. The control device includes a low-pass filter, a current detection unit, and an averaging processing unit. The low-pass filter has a frequency characteristic corresponding to a time constant. The current detection unit detects current flowing through an electric resistance unit connected between a DC power supply unit and the N-phase inverter via the low-pass filter. The averaging processing unit executes averaging processing on a current value of the current detected by the current detection unit at a plurality of current detection times.
A plurality of stationary vanes (33) provided to a fan device (100) include a first stationary vane (331). At least a portion of the radial outer end part of the first stationary vane is connected to an enlarged diameter surface (322). The radial outer end part of the first stationary vane and the enlarged diameter surface of a cylindrical outer frame body (32) overlap with a space interposed therebetween. The outer frame body surrounds an impeller, a motor, and the like, and extends axially. The enlarged diameter surface is a portion of the inner circumferential surface of the outer frame body and expands radially outward toward one side in the axial direction. A pedestal part (35) extending toward one side in the axial direction from the enlarged diameter surface is disposed in said space. A recessed part (34) recessed from one end in the axial direction of the first stationary vane toward the other side in the axial direction is disposed at the radial outer end part which is at least a portion of the plurality of stationary vanes. The radial inner end part of the recess is disposed radially inward of a cylindrical surface.
A flow path assembly includes a main body including a flow path continuous with each of a first opening and a second opening, a first tubular body extending in a first direction intersecting the first opening in the flow path and including a plurality of holes, and a sensor to detect a pressure in the first tubular body. A first end of the first tubular body in the first direction is connected to the first opening. The sensor is closer to a second end of the first tubular body than the first end of the first tubular body.
A cold plate includes a bottom wall, a top wall, blades, and a side wall. The bottom wall includes a lower surface in thermal contact with a heat generating component. The top wall covers an upper surface of the bottom wall. The blades are arranged side by side on the upper surface of the bottom wall. The side wall is located between the bottom wall and the top wall, and includes a refrigerant flow path that surrounds the blades and through which the refrigerant flows. The bottom wall includes column portions that protrude from the upper surface of the bottom wall, and oppose each other in the extending direction of the blades over the blades inside the side wall. The upper end of the column portion is located at the same position as the upper end of the blade or above the upper end of the blade.
A rotating electrical machine includes a rotor and a stator. The rotor includes a shaft, a rotor core, magnets arranged on a radially outer surface of the rotor core, and magnetic portions provided on the radially outer surfaces of the magnets and each including an outer peripheral surface that is a curved surface. The stator core of the stator includes an annular core back portion and tooth portions arranged along the inner peripheral surface of the core back portion. The tooth portions each includes a tooth body portion extending radially inward from an inner peripheral surface of the core back portion, and an umbrella portion protruding to two sides in the circumferential direction at a distal end portion of the tooth body portion. A groove portion extending along the axial direction is provided on a surface facing radially inward of the tooth portion.
A cold plate includes a bottom wall, a top wall, blades, a side wall, and a mesh portion. The bottom wall includes a lower surface in thermal contact with a heat generating component. The top wall covers an upper surface of the bottom wall. The blades are arranged side by side on the upper surface of the bottom wall and extend linearly. The side wall is located between the bottom wall and the top wall, and defines a refrigerant flow path that surrounds the blades and through which the refrigerant flows. The mesh portion is sheet-shaped, located between the top wall and the blades, and includes a metal portion.
A cooling device includes a first and second cold plate, and first, second, third, and fourth pipes. The first cold plate includes first and second openings, and a first flow path continuous with each of the first and second openings. The first pipe is connected to the first opening. The second pipe is connected to the second opening. The second cold plate includes third and fourth openings, and a second flow path continuous with each of the third and fourth openings. The third pipe is connected to the third opening. The fourth pipe is connected to the fourth opening. The first and second openings are spaced apart from each other in the first direction. The fourth pipe extends between the first and second openings and in a second direction intersecting the first direction.
An information processing method according to an embodiment causes a computer, which executes software, to: when detecting an abnormality of the software during execution of the software, store information about the abnormality of the software in a storage area of a storage unit provided with the storage area in which information about an abnormality is stored; and then perform an internal reset without erasing the information stored in the storage area.
09 - Scientific and electric apparatus and instruments
Goods & Services
Apparecchi e strumenti per la conversione dell’energia elettrica; dispositivi di controllo dell’energia elettrica; apparecchi e strumenti per la commutazione dell’energia elettrica; trasformatori: apparecchi e strumenti di controllo dell’energia elettrica.
A cooling device comes into thermal contact with a first heat generating component, and includes a first component and a second component. The first component defines a liquid flow path. The second component is connected to one side in the first direction with respect to the first component to define the flow path. The first component includes a reservoir. The reservoir includes a wall surface opposing a side opposite to an edge of the first component and extending to the one side in the first direction. At least a portion of the reservoir is closer to an edge of the first component than the flow path.
A rotor provided in a rotary electric machine, opposed to a stator, and rotatable about a central axis, includes magnetic pole portions arranged circumferentially about the central axis, and a rotor core that supports the magnetic pole portions from radial one side. Each magnetic pole portion includes a first magnet with a magnetization direction that is the radial direction, and a second magnet with a magnetization direction that is inclined circumferentially with respect to the radial direction. The second magnets are arranged symmetrically on the circumferentially outer sides of the first magnet. A first gap is provided between the first magnet and the second magnet in the circumferential direction, and a second gap is provided between the second magnets in the circumferential direction between the adjacent magnetic pole portions. A maximum circumferential width of the second gap is larger than a maximum circumferential width of the first gap.
A motor according to the present invention comprises: a rotor that can rotate about the central axis; and a stator that faces the rotor in the axial direction. The rotor has a plurality of magnets arranged along the circumferential direction and an annular first ring member for supporting each of the plurality of magnets from the inside in the radial direction. The plurality of magnets have a plurality of first magnets, the magnetization direction of which is the axial direction and a plurality of second magnets, the magnetization direction of which intersects the axial direction. The plurality of first magnets and the plurality of second magnets are each arranged along the circumferential direction in a Halbach array. The first ring member has a plurality of protrusion portions protruding radially outward. Each of the plurality of protrusion portions is disposed spaced apart from each other along the circumferential direction. The one or more magnets have contact portions that contact the protrusions in the circumferential direction.
H02K 1/2796 - Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets where both axial sides of the rotor face a stator
A motor according to the present invention comprises: a rotor that can rotate about the central axis; and a stator that faces the rotor with an interval therebetween in the axial direction. The rotor has a plurality of magnets arranged along the circumferential direction, and holding parts for holding the plurality of magnets. The holding parts have a first metal holding part and a second resin holding part that holds the first holding part and the plurality of magnets.
H02K 1/2796 - Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets where both axial sides of the rotor face a stator
This stator comprises a stator core and coils. The stator core has: an annular core back surrounding the central axis; and teeth. A plurality of teeth extend radially inward from the core back and are circumferentially arranged. The coils are each composed of a conductor wound around the teeth. The core back has a plurality of through-holes penetrating in the radial direction and disposed in the circumferential direction. Each tooth has a projection that protrudes radially outward from a radially outer end and is disposed inside a through-hole.
A pump system includes a housing, a plurality of pumps, and a controller. The housing includes an opening and a fluid flow path. The plurality of pumps are insertable into and removable from the housing via the opening, and are connected to the flow path by being attached to the housing. When the controller recognizes that a second pump, other than a first pump among the plurality of pumps, is connected to the flow path while the first pump of the plurality of pumps is in operation, the controller is configured or programmed to stop operation of the first pump only for a specific time. The controller is configured or programmed to control power supply to the second pump during the specific time.
A motor includes a rotor including a rotating shaft rotatable around a central axis, a stator radially opposed to the rotor, a housing that accommodates the rotor and the stator, and a connector that is inserted and fixed to the housing and is connected to a busbar in a radial direction. The connector includes at least two support portions. The at least two support portions are respectively located on two sides of the connector, and are respectively connected and fixed to a side wall and a bottom surface of the housing in an axial direction. The support portions support and fix the connector from the sides, and prevent the connector from being subjected to a force of the busbar towards the radially inner side to prevent the connector from tilting inward.
A motor includes a shaft, a stator, a rotor, a holding portion, and a heat dissipation portion. The shaft extends in a first direction along a central axis. The stator includes a coil and surrounds a radially outer periphery of the shaft. The rotor surrounds a radially outer periphery of the stator, and is rotatable with respect to the stator together with the shaft. The shaft is rotatably attached to the holding portion, and the holding portion holds the stator. The heat dissipation portion is in thermal contact with the coil. The holding portion further holds the heat dissipation portion.
H02K 3/24 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
H02K 1/18 - Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
H02K 7/00 - Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
A rotating electrical machine of the present disclosure includes a rotor rotatable about a central axis, a stator including a coil portion made from a first material and facing the rotor with a gap interposed therebetween, a substrate that supplies power to the coil portion, a bus bar electrically connected to the substrate and made from a second material different from the first material, and a connection member fixed to the bus bar and electrically connecting the coil portion and the bus bar. The coil portion includes a coil main body portion mounted on the stator and a coil lead wire drawn out from the coil main body portion. The connection member includes a housing portion that accommodates the coil lead wire in the inside, and a pressing portion that presses the coil lead wire against an inner surface of the housing portion.
According to the embodiments, a semiconductor module (2) comprises a plurality of semiconductor chips (3), a busbar (51), and a stress relaxation part (53). The plurality of semiconductor chips (3) are provided on a substrate (7). The busbar (51) is provided on the semiconductor chips and electrically connects the semiconductor chips. The busbar (51) is formed from a plurality of small busbar parts (52). The stress relaxation part (53) is provided between adjacent small busbar parts (52) at at least one location, electrically connects the small busbar parts (52), and alleviates thermal stress that occurs between the small busbar parts.
H01L 23/52 - Arrangements for conducting electric current within the device in operation from one component to another
H01L 25/07 - Assemblies consisting of a plurality of individual semiconductor or other solid-state devices all the devices being of a type provided for in a single subclass of subclasses , , , , or , e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in subclass
H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
H10D 80/20 - Assemblies of multiple devices comprising at least one device covered by this subclass the at least one device being covered by groups , e.g. assemblies comprising capacitors, power FETs or Schottky diodes
44.
POSITION DETECTION DEVICE AND POSITION DETECTION METHOD
This position detection device comprises a signal processing unit. A period corresponding to one cycle of the mechanical angle of a rotor is divided into a plurality of quadrants. A period corresponding to one cycle of the mechanical angle of the rotor is divided into a plurality of sections. The signal processing unit executes a first acquisition process for acquiring a quadrant number indicating a quadrant, a second acquisition process for acquiring a section number, a mechanical angle calculation process for calculating information relating to the mechanical angle of the rotor, and an abnormality detection process for detecting an abnormality of a first detection signal and abnormality of a second detection signal. The abnormality detection process includes a first abnormality determination process for determining that an abnormal location is present in the first detection signal if the chronological arrangement of quadrant numbers is different from a chronological arrangement of quadrant numbers when normal, and a second abnormality determination process for determining that an abnormal location is present in the second detection signal if the chronological arrangement of section numbers is different from a chronological arrangement of section numbers when normal.
G01D 5/244 - Mechanical means for transferring the output of a sensing memberMeans 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 convertingTransducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trainsMechanical means for transferring the output of a sensing memberMeans 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 convertingTransducers not specially adapted for a specific variable using electric or magnetic means generating pulses or pulse trains
This circuit board has a circuit component, a support that supports the circuit component, a trace pattern provided on the support, and a through hole that penetrates through the support from one surface to the surface on the opposite side and accepts a terminal of the circuit component. The circuit board has a solder joint portion, provided inside the through hole, where a solder joint is formed between the terminal and the trace pattern. The circuit board has a first suppressing portion which is provided on the trace pattern, discontinuously surrounds the through hole, and has a lower thermal conductivity than the trace pattern. The circuit board has an insulating portion provided at the outer periphery of the trace pattern and a second suppressing portion which is provided on the trace pattern, is located between the first suppressing portion and the insulating portion, and has a lower thermal conductivity than the trace pattern.
H05K 3/34 - Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
A coil attachable to a tooth includes a first winding body including a first wound flat wire, a second winding body including a second wound flat wire that is located on a radial side of the first winding body and that is connected to the first winding body, a pair of first axially extending portions extending in an axial direction of a central axis on two circumferential sides of the tooth to which the first winding body is attached, and a pair of second axially extending portions extending in the axial direction of the central axis on two circumferential sides of the tooth to which the second winding body is attached. The pair of second axially extending portions is respectively arranged adjacent to radially outer sides of the pair of first axially extending portions.
H02K 15/04 - Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of windings prior to their mounting into the machines
A motor (10) comprises a fixed part (300), a rotating part (100), and a rim part (400). The rotating part (100) rotates with respect to the fixed part (300). The rim part (400) supports a tire. The rotating part (100) is provided with: a yoke (110) that has a cylindrical yoke body part (113) and a yoke side contact part (114) which is provided outward of the yoke body part (113) in the radial direction (RD); and a magnet (120) that is attached to the yoke body part (113). The rim part (400) is provided with a rim side contact part (411) that contacts the outside of the yoke side contact part (114) in the radial direction (RD). The length of the yoke side contact part (114) in the axial direction (AD) and the length of the yoke body part (411) in the axial direction (AD) differ, or the position of the center of the yoke side contact part (114) in the axial direction (AD) and the position of the center of the yoke body part (113) in the axial direction (AD) differ. [Selected drawing] FIG. 4
The present invention comprises: a power converter in which each of three phases has an upper arm and a lower arm; and a signal generator which generates signals for driving the respective upper and lower arms of the three phases in the power converter by an energization method that has an energization period of 120-180° and in which PWM control is performed on one of the upper arms and the lower arms. The signal generator comprises a switching unit that, under predetermined conditions, switches the drive mode of the power converter between a first mode in which the upper arms are controlled by the PWM control and a second mode in which the lower arms are controlled by the PWM control.
H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
A capacitor module according to the present invention comprises a capacitor element having a capacitor body and a terminal that extends from the capacitor body toward one side in a first direction, a bus bar connected to the terminal, and a case for holding each of the capacitor element and the bus bar. The case has a cover part disposed between the capacitor body and the bus bar. The cover part is provided with a hole part through which the terminal passes in the first direction. The bus bar includes a bus bar body part that extends in a direction intersecting the first direction, and a connection that is connected to the bus bar body part and arranged at an edge part of the hole part when viewed from the first direction. The terminal is connected to the connection part. The cross-sectional area of the hole part decreases toward the one side in the first direction.
H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
A first joint has a central axis and extends in an axial direction along the central axis. The first joint includes a first joint body, an axially facing portion, an actuation portion, and a mounting portion. The first joint body is coupled to the second joint along the central axis. The axially facing portion axially opposes a protruding portion protruding from an outer peripheral surface of the second joint, from a front end side in an axial direction of the first joint body. The actuation portion is connected to the axially facing portion and is actuatable along an axis intersecting direction intersecting the central axis. The mounting portion includes an actuation portion restricting portion restricting movement of the actuation portion in a state where the axially facing portion and the protruding portion oppose each other.
F16L 37/084 - Couplings of the quick-acting type in which the connection between abutting or axially-overlapping ends is maintained by locking members combined with automatic locking
F16L 37/46 - Couplings of the quick-acting type with fluid cut-off means with fluid cut-off means in only one of two pipe-end fittings with a gate valve or sliding valve
A motor control method includes driving a motor in a forward rotational direction at a rotational speed corresponding to a duty cycle range of a first control signal that is a pulse width modulation signal, and when the rotational direction and the rotational speed of the motor correspond to that when the motor is not rotating and a second control signal that is a pulse width modulation signal having a frequency different from a frequency of the first control signal is received, driving the motor in a reverse rotational direction. Thus, the method controls the motor by switching the rotational direction of the motor between the forward rotational direction and the reverse rotational direction with a high degree of freedom to reduce or prevent malfunctioning.
H02P 27/08 - 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
52.
TEMPERATURE DETECTION DEVICE, COIL, TRANSFORMER, AND TEMPERATURE DETECTION METHOD
A temperature detection device according to one aspect of the present disclosure comprises a twisted wire and a detector. The twisted wire is formed of one conductor. The twisted wire is provided so as to be in contact with the conductive wire of the coil. The detector detects the temperature of the conductive wire on the basis of the resistance value of the twisted wire.
An inverter unit electrically connected to a stator and a bus bar unit electrically connecting the stator and the inverter unit are included. The bus bar unit includes a temperature detection unit that detects a temperature of a bus bar, and a holding portion that holds the bus bar and the temperature detection unit. A connection portion protruding from the holding portion of the temperature detection unit and electrically connected to the inverter unit radially overlaps the bus bar connection portion protruding from the holding portion of the bus bar and electrically connected to the inverter unit.
An exemplary refrigerant circulation device according to the present disclosure comprises a housing, a radiator, a pump, and an airflow generation unit. The housing has an opening. The radiator is positioned so as to be spaced apart from the opening. The pump is connected to a refrigerant flow-path of the radiator, and pumps the refrigerant. The airflow generation unit generates an airflow that passes through the opening and contacts the flow-path. The pump is located between the opening and the radiator. The distance between the opening and the pump is shorter than the distance between the pump and the radiator.
F28D 1/02 - Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with the heat-exchange conduits immersed in the body of fluid
F04B 41/00 - Pumping installations or systems specially adapted for elastic fluids
H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
A spindle motor includes a shaft, a base part, a stator core, a rotor, and a bearing part. The shaft extends along a center axis extending in the vertical direction. The bearing part includes an upper annular member, a lower annular member, and a sleeve. The upper annular member and the lower annular member protrude radially outward from an outer peripheral surface of the shaft and are disposed to be spaced apart from each other in the axial direction. The sleeve covers the outer peripheral surface of the shaft, extends in the axial direction, and is defined in a cylindrical shape. The base part has an annular protruding portion that protrudes axially upward from the upper surface of the base part and surrounds the shaft. The stator core is held on an outer peripheral surface of the annular protruding portion.
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 5/24 - CasingsEnclosuresSupports specially adapted for suppression or reduction of noise or vibrations
A rotary electric machine according to one embodiment of the present invention comprises: a stator core having a teeth section; an insulator that surrounds the teeth section around an axial line extending in a first direction and passing through the teeth section, and that is elongated in a second direction orthogonal to the first direction as viewed in the first direction; and a coil part that is formed of an elastic coil wire and is wound around the insulator. The insulator has a first insulator part, a second insulator part opposite the first insulator part in the second direction, and protrusion parts protruding in the second direction. The protrusion parts include a first protrusion part that protrudes from one of the first and second insulator parts toward the other of the first and second insulator parts. The first protrusion part is deformable.
A stator includes a core back, teeth, and a coil. The core back has an annular shape surrounding the central axis in a circumferential direction. The teeth extend radially outward from the core back, and are arranged in the circumferential direction. The coil is wound around each of the teeth. In the coil, a current of any phase of three-phase alternating current flows. At least a portion of an extending line connecting a first coil wound around a first tooth among the teeth and a second coil through which a current having the same phase as that of the first coil flows is located in a slot between any two of the teeth except the first tooth and a second tooth located adjacent to the first tooth. The extending line is at a root of any of the two teeth in the slot.
A motor includes a coupling portion in which common wires of a plurality of coil groups are electrically connected and coupled, the coupling portion extends from a radial inside to a radial outside or vice versa in a slot that is a portion between teeth adjacent to each other in a circumferential direction, and the motor includes a sealing portion that seals at least the coupling portion.
H02K 3/44 - Protection against moisture or chemical attackWindings specially adapted for operation in liquid or gas
H02K 3/52 - Fastening salient pole windings or connections thereto
H02K 11/33 - Drive circuits, e.g. power electronics
H02K 15/122 - Impregnating, moulding insulation, heating or drying of windings, stators, rotors or machines of windings
H02K 15/32 - Manufacture of terminal arrangementsConnecting the terminals to external circuits
H02K 21/22 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
A refrigerant circulation device includes a common flow path, first and second flow paths branching from the common flow path, a third flow path, a heat exchanger through which the first and third flow paths extend and in which heat is exchanged, a first valve to adjust the flow rate of the first flow path, a second valve to adjust the flow rate of the second flow path, a sensor to detect a temperature of a refrigerant, a device temperature that is a temperature in the device, and a relative humidity in the device, and a changing assembly to change first and second opening degrees of the first and second valve such that a sum of the first and second opening degrees becomes a predetermined value, based on the temperature, the device temperature, and the relative humidity.
A lead wire of a coil group of a motor penetrates a through hole of a circuit board, an exposed portion of the lead wire is electrically connected to a wiring pattern, and a cover seals the exposed portion of the lead wire.
H02K 3/52 - Fastening salient pole windings or connections thereto
H02K 11/33 - Drive circuits, e.g. power electronics
H02K 15/32 - Manufacture of terminal arrangementsConnecting the terminals to external circuits
H02K 21/22 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
65.
SUPPORT ROLLER BEARING REGREASING ARRANGEMENT FOR HIGH LOAD CRANK ASSEMBLY
A crank assembly for displacing a load includes a motor and a displacement arm assembly. The motor includes a rotatable output shaft that defines a rotation axis. The displacement arm assembly includes a swingable crank arm and a support roller bearing. The swingable crank arm is coupled to the output shaft to swing about the rotation axis when the output shaft rotates. The swingable crank arm defines a pivot end adjacent the rotation axis and an opposite displacement end. The support roller bearing is rotatably supported on the swingable crank arm proximate the displacement end. The support roller bearing is configured to engage the load. The support roller bearing defines a bearing axis, which is substantially parallel to and offset from the rotation axis.
An electric motor includes a stator, a rotor rotatable relative to the stator, a housing, and an encoder assembly. The housing defines a motor chamber in which the stator and rotor are at least partly housed. The housing includes an endshield that defines in part the motor chamber. The encoder assembly is configured to sense an operational parameter of the motor and includes an encoder and an encoder cover. The encoder is adjustably positioned within an axially recessed channel of the endshield. The encoder cover is secured relative to the endshield to at least partially overlie the encoder.
H02K 11/215 - Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
G01D 18/00 - Testing or calibrating apparatus or arrangements provided for in groups
H02K 11/01 - Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for shielding from electromagnetic fields
H02K 29/08 - Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using magnetic effect devices, e.g. Hall-plates or magneto-resistors
A flow path structure includes a flow path tube, a connection portion, and a clamp portion. The flow path tube includes a flow path tube space. The connection portion internally includes a connection portion space, and at least a portion of the connection portion is located in the flow path tube space. The clamp portion is located on an outer peripheral surface of the flow path tube. The thermal expansion coefficient of the flow path tube is different from that of the connection portion. The clamp portion includes a band portion surrounding the outer peripheral surface of the flow path tube at a position where the flow path tube and the connection portion overlap each other, and an acting portion that changes the size of an inner diameter of the band portion.
F16L 33/207 - Undivided rings, sleeves, or like members contracted on the hose or expanded inside the hose by means of toolsArrangements using such members only a sleeve being contracted on the hose
H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
This impeller for a fan device comprises a hub, a plurality of blades, and a connection part. The hub has a lidded tube shape that extends in the axial direction. One end of the hub in the axial direction is open. The plurality of blades extend radially outward from a radially outward side surface of the hub and are arranged along the circumferential direction. The connection part is disposed between radially outward ends of at least some blades which are adjacent in the circumferential direction, extends in the circumferential direction, and connects the radially outer radially outward ends of said blades. As seen from the axial direction, the connection part spreads out radially. This impeller suppresses the occurrence of noise when the blades rotate.
A motor includes a stator, a rotor, a stator holder with electrical conductivity that holds the stator, a circuit board, and a fastening screw. The fastening screw with electrical conductivity includes a head portion and a screw body, and holds the circuit board clamped between the head portion and the stator holder in a state where the screw body is screwed to the stator holder while being in contact with both a frame ground portion of the circuit board and the stator holder.
H02K 11/01 - Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for shielding from electromagnetic fields
H02K 1/18 - Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
70.
STATOR, MOTOR, AND METHOD FOR MANUFACTURING STATOR
One embodiment of a stator according to the present invention is a stator that faces a rotor that can rotate around a central axis line in the axial direction, the stator being provided with: a plurality of teeth arranged in the circumferential direction; coils respectively attached to the plurality of teeth; and a first resin part for holding the plurality of teeth. The first resin part has an insulator part positioned between the teeth and the coils.
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
A rotor according to an aspect of the present invention includes a shaft including: a first shaft hole extending in an axial direction; and a second shaft hole extending radially outward from the first shaft hole and opening to an outer peripheral surface of the shaft. A rotor core includes a plurality of core holes extending in the axial direction and disposed at intervals in a circumferential direction. A plate includes a through-hole overlapping the core hole when viewed in the axial direction, and a flow path connecting the second shaft hole and the through-hole. The plate has an outer edge away from a central axis by a second distance that is shorter than a first distance from the central axis to an outer edge of the rotor core.
A coupling device includes a first portion and a coupling portion. The first portion includes a first flow path and an attachment portion. The coupling portion includes a first tubular portion including one end portion to be connected to a second tubular portion of a second portion including a second flow path, and an arrangement portion provided at the other end portion of the first tubular portion and to be attached to the attachment portion. The movement of the arrangement portion with respect to the first portion is suppressed in the axial direction of the first tubular portion. The arrangement portion is movable with respect to the first portion in the radial direction of the first tubular portion. A maximum outer diameter of the arrangement portion is smaller than a maximum outer diameter of the first tubular portion.
F16L 27/08 - Adjustable jointsJoints allowing movement allowing adjustment or movement only about the axis of one pipe
F16L 29/04 - Joints with fluid cut-off means with a cut-off device in each of the two pipe ends, the cut-off devices being automatically opened when the coupling is applied
73.
HEAT DISSIPATION MEMBER, COOLING DEVICE, AND SEMICONDUCTOR MODULE
A heat dissipation member to be installed in a liquid cooling jacket includes a base extending in a first direction of a refrigerant flow and a second direction, and having a thickness in a third direction, one or more fin groups arranged side by side in the first direction, the fin group including fins projecting from the base to one side in the third direction and arranged in the second direction, and a top plate at an end on one side in the third direction of the fin. A gap in the third direction is between the top plate and a top surface of the liquid cooling jacket. The top plate has first recessed portions recessed from a surface on one side in the third direction of the top plate to another side in the third direction and arranged side by side in the first direction.
H01L 23/473 - Arrangements for cooling, heating, ventilating or temperature compensation involving the transfer of heat by flowing fluids by flowing liquids
A motor includes a rotor rotatable about a central axis extending in an axial direction, a bearing to rotatably support the rotor radially inside, a bearing accommodating portion to accommodate the bearing radially inside, and an annular portion located over at least a portion of the entire region in a circumferential direction. The bearing includes a first groove that is recessed radially inward on an outer peripheral surface and is located over at least a portion of the entire region in the circumferential direction. The bearing accommodating portion includes a second groove that is recessed radially outward on the inner peripheral surface and located over at least a portion of the entire region in the circumferential direction. A portion of the annular portion is accommodated in the first groove. Another portion of the annular portion is accommodated in the second groove.
This motor comprises a rotor, a stator located on the radially outer side of the rotor, and a bus bar assembly positioned on one side of the stator in the axial direction. The insulator of the stator has an inner side insulator portion positioned radially inward of a coil. The bus bar assembly has a bus bar and a bus bar holder that holds the bus bar. The bus bar holder has an annular holder body portion surrounding the central axis. The bus bar has a coil connection portion connected to a coil lead-out line led out from the coil. The coil connection portion protrudes radially outward from the holder body portion. One of the inner side insulator portion and the bus bar holder has a first recess. The other of the inner side insulator portion and the bus bar holder has a first protrusion. At least a part of the first protrusion is inserted into the first recess. The bus bar holder is supported by the inner side insulator portion in the axial direction.
In the present invention, taking the downstream side of this liquid cooling jacket as one side in a first direction and the upstream side as the other side in the first direction, when the number of protrusions l is even, the numbers n = 1 to m (where m = l/2) are assigned to the protrusions in order, respectively, from the furthest other side in the first direction toward the one side in the first direction, and from the furthest one side in the first direction toward the other side in the first direction, and when the number of protrusions l is odd, the numbers n = 1 to m (where m = (l+1)/2) are assigned to the protrusions in order, respectively, from the furthest other side in the first direction toward the one side in the first direction, and from the furthest one side in the first direction toward the other side in the first direction, and the gap in a third direction between the protrusions and a heat dissipation member decreases progressively for protrusions assigned with greater numbers.
H01L 23/473 - Arrangements for cooling, heating, ventilating or temperature compensation involving the transfer of heat by flowing fluids by flowing liquids
F28F 1/40 - Tubular elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
This connection member has: a first component in which a first flow path for a fluid is formed; a second component which is connected to the first component and in which a second flow path connected to the first flow path is formed; and a first sealing member and a second sealing member that create a seal between the first component and the second component. The connection member also has a cylinder part extending along a first direction in which the first flow path extends. The cylindrical part has a first surface positioned on the outer side of the cylindrical part in the radial direction, and a second surface extending in a second direction intersecting the first direction. The second component has a third surface facing the first surface and a fourth surface facing the second surface. The first sealing member and the second sealing member are annular members and are disposed on the outer periphery of the first flow path or the second flow path. The first sealing member is disposed between the first surface and the third surface. The second sealing member is disposed between the second surface and the fourth surface.
A communication method according to one aspect of the present invention is executed by each of a plurality of communication devices sharing a communication bus, the method comprising: a first step for acquiring a random number; a second step for generating a first standby time and the address of the own device on the basis of the random number; a third step for starting measurement of time; a fourth step for determining the own device as a master when the time has reached the first standby time without receiving access from another communication device; a fifth step for accessing the other communication device immediately after determining the own device as the master; and a sixth step for determining the own device as a slave when access from the other communication device has been received before the time reaches the first standby time.
A refrigerant circulation device includes a primary flow path, a secondary flow path, a valve, and a controller. The primary flow path allows circulation of a primary refrigerant. The secondary flow path allows circulation of a secondary refrigerant. The valve is provided in the primary flow path or the secondary flow path, and includes an opening degree that is adjustable. The controller is configured or programmed to control operation of the valve and cause the valve to perform a predetermined operation when a period during which the valve is not operated exceeds a threshold value.
This inverter device comprises: a housing; a switching element that is attached to an inner surface of the housing; a capacitor that is attached to the inner surface alongside the switching element in a first direction, and that is connected to the switching element; a first bus bar that extends along the first direction to connect the switching element and the capacitor; a second bus bar that is positioned on a side opposite the inner surface with the first bus bar therebetween, and that extends along the first direction to connect the switching element and the capacitor; a first welding trace that extends on the first bus bar in a second direction intersecting the first direction; and a plurality of second welding traces that extend on the second bus bar in the second direction, and that are positioned on both sides sandwiching the first welding trace when viewed in a normal direction of the inner surface.
H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
H01G 13/00 - Apparatus specially adapted for manufacturing capacitorsProcesses specially adapted for manufacturing capacitors not provided for in groups
A heat dissipation member includes a plate-shaped base portion that extends in a first direction along a direction in which a refrigerant flows and in a second direction orthogonal to the first direction and has thickness in a third direction orthogonal to the first direction and the second direction, and a fin projecting from the base portion toward one side in the third direction. The fin includes a flat plate-shaped side wall portion that extends in the first direction and the third direction, and has a thickness direction in the second direction. The side wall portion has a slit penetrating in the second direction. The number of the slits for each of regions defined by the same length in the first direction increases toward one side in the first direction which is the downstream side.
A power conversion device includes a first three-phase full-bridge circuit connected to one end of a three-phase coil of an open-winding three-phase motor, a second three-phase full-bridge circuit connected to another end of the three-phase coil, and a control unit that individually controls voltage application time of the three-phase coil. The control unit minimizes a width of a first time region in which voltage application time of an X-phase coil and voltage application time of a Y-phase coil overlap within one control period of the pulse width modulation, and changes a position of a second time region occupied by voltage application time of the Z-phase coil within the one control period, based on target voltage application time length of each of the X-phase coil, the Y-phase coil, and the Z-phase coil with a smallest current value among the three-phase coils and a current direction of the Z-phase coil.
H02M 7/5395 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency by pulse-width modulation
H02M 1/14 - Arrangements for reducing ripples from DC input or output
H02M 7/5387 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
A rotor is provided in a rotary electric machine, is opposed to a stator, and rotatable about a central axis. The rotor includes magnetic pole portions arranged along a circumferential direction about the central axis, and a rotor core that supports the magnetic pole portions from a radial side. The magnetic pole portions include a main magnet in which a radial direction is a magnetization direction, and sub magnets arranged symmetrically with each other on a circumferential outside of the main magnet, sub magnets in which a direction inclined circumferentially with respect to a radial direction being a magnetization direction. The rotor core includes a recess portion that accommodates a main magnet supported portion facing radially inward of the main magnet and is recessed radially inward.
A cooling device includes a liquid cooling jacket and a heat dissipation member. The heat dissipation member includes a base extending in a first direction of a refrigerant flow and in a second direction, with a thickness in a third direction, a fin projecting from the base to one side in the third direction, and a top plate at an end of the fin. The jacket includes a first flow path extending in the first direction, and a second flow path connected to and extending from the downstream side of the first path to one side in the third direction. In the third direction, a surface connecting the first and second paths overlaps the top plate. A heating element is on the most downstream side on another side in the third direction of the base from where the second path starts to extend to one side in the third direction.
H01L 23/367 - Cooling facilitated by shape of device
H01L 23/473 - Arrangements for cooling, heating, ventilating or temperature compensation involving the transfer of heat by flowing fluids by flowing liquids
85.
SYSTEM AND METHOD FOR STATIC AUTO-TUNING ELECTRIC MOTOR
A static auto-tuning system and method for controlling operation of a motor in a system. A speed reference signal is generated resulting in a speed response of the motor. Closed-loop feedback magnifies the rotating friction effect to an observable level. Inertia and rotating friction coefficient values of the system are estimated based on the speed frequency response and a virtual damping coefficient. A fixed low frequency speed signal may result in a first frequency response function for determining virtual damping, and a variable frequency excitation signal may result in a second frequency response function for determining the inertia and rotating friction characteristics. Closed-loop gains are determined based on these characteristics. The excitation signal may be sampled and a peak value in each interval may be identified and stored to produce an envelope of peak values for determining the gain response. Operation of the motor is controlled using the determined gains.
G05B 13/04 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
This impeller in a fan device includes a hub and a plurality of rotor blades. The hub assumes the shape of a bottomed cylinder extending in the axial direction. One end of the hub in the axial direction is open. The plurality of rotor blades are disposed further radially outward than the hub and are arranged along the circumferential direction. Each of the rotor blades has a blade part and a holding part. The blade part expands in the axial direction and the radial direction and inclines in one circumferential direction toward the other side in the axial direction. The holding part extends radially inward from one end of the blade part in the axial direction and is connected to the hub.
A vibrating motor includes a stationary portion, a movable element having a magnet member and capable of vibrating in a first direction, and an elastic member. The stationary portion has a coil that applies a driving force to the magnet member when the coil is energized, and a case that accommodates the movable element and the coil therein. The movable element has a holder member that holds one end portion in the first direction of the magnet member. The elastic member is connected to the holder member. The case has a case notch. The case notch is notched toward the other side in the first direction from one end in the first direction of the case. The holder member has a holder notch that is notched toward one side in a second direction perpendicular to the first direction. The case notch and the holder notch overlap as viewed in the second direction.
H02K 33/18 - Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with coil systems moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnets
B06B 1/04 - Processes or apparatus for generating mechanical vibrations of infrasonic, sonic or ultrasonic frequency making use of electrical energy operating with electromagnetism
H02K 33/02 - Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs
88.
ROTOR, ROTOR MANUFACTURING APPARATUS, AND ROTOR MANUFACTURING METHOD
A rotor includes a columnar rotor core extending in the axial direction, and a rotor cover covering a radially outer side of the rotor core. The rotor cover includes a protruding portion protruding to one side in the axial direction with respect to a one-side end surface in the axial direction of the rotor core, and a flange portion extending radially outward at a one-side end portion in the axial direction of the protruding portion.
H02K 15/035 - Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets on the rotor
H02K 15/121 - Impregnating, moulding insulation, heating or drying of windings, stators, rotors or machines of cores
The present invention comprises: a capacitor module having a capacitor element and a case part for accommodating the capacitor element; a power module having a power semiconductor element for performing power conversion; a control board for driving the power module; and a bus bar module having a bus bar. The capacitor element has a capacitor body part and a first connection terminal extending from the capacitor body part to one side in a first direction. The power module has a second connection terminal. The bus bar electrically connects the first connection terminal and the second connection terminal. The case part has: a first housing part which is recessed from one side in the first direction to the other side in the first direction and accommodates the capacitor body part; and a first flow path through which a refrigerant flows.
H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
A rotor of one embodiment of the present invention is able to rotate about the central axis, and comprises: a rotor core; and an end plate that has a first plate surface facing the rotor core in the axial direction, and a second plate surface facing the inverse side from the first plate surface. The first plate surface comprises a contact surface that makes contact with the rotor core in the axial direction in a state where at least a portion of the end plate is elastically deformed in the axial direction. The contact surface comprises a first surface. In a state where the end plate is not elastically deformed, the first surface is, toward the radially outward side, located increasingly close to a first side of the axial direction where the rotor core is arranged with respect to the end plate. In the state where the end plate is not elastically deformed, a radially outward end of the first surface is a portion of the contact surface that is located closest to the first side. The end plate has a first recess provided to an outer surface of the end plate. At least a portion of the first recess overlaps the first surface in the axial direction.
According to one embodiment of this rotor, the rotor is for a rotating electric machine rotating around a central axis, and the rotor comprises: a rotor core in which are provided a plurality of slots that are arranged side by side in a circumferential direction and penetrate in an axial direction; a plurality of conductor sections disposed in the slots; a pair of end rings that are located respectively on one axial-direction side and the other axial-direction side of the rotor core and link the plurality of conductor sections; and a pair of plate members that are located between the end rings and an end surface on the one axial-direction side of the rotor core and an end surface on the other axial-direction side of the rotor core, respectively. Either the plate members or the end rings have protruding sections that project in the axial direction. The other of the plate members and the end rings have accommodation sections that accommodate the protruding sections. The protruding sections and the accommodation sections extend in the circumferential direction.
[PROBLEM] To provide a technology capable of improving a cooling effect. [SOLUTION] A rotating electric machine according to one aspect of the present disclosure includes: an annular stator yoke; a plurality of teeth; a coil; and a cooler. The plurality of teeth protrude radially inward or radially outward from the stator yoke. The coil is wound around the teeth. The cooler extends along the axial direction of the stator yoke between adjacent coils and contacts the coils.
H02K 3/24 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
H02K 9/19 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
A rotor is a rotor rotatable about a central axis, and includes a rotor core and a plurality of flux barrier groups provided in the rotor core and arranged at intervals in a circumferential direction. Each of a plurality of the flux barrier groups includes a plurality of flux barriers arranged side by side at intervals in a radial direction, the rotor core has a projecting portion projecting from an edge portion of the flux barrier toward the inside of the flux barrier, and in each of a plurality of the flux barrier groups, an edge portion of at least one of the flux barriers is provided with two or more of the projecting portions.
An adaptive speed control system and method for adapting control of an electric motor under a changing load condition. A load torque observer determines a load torque value when the motor is operating at a constant speed, and the load torque value is used to adapt a torque. An inertia observer determines an inertia load value when the motor is operating at a changing speed, and the inertia load value is used to adapt a controller gain. An active disturbance input decoupler provides disturbance rejection when the motor is operating at a constant speed. An adaptive control switch switches the load torque observer between driving the inertia observer and driving the active disturbance input decoupler. The system may be configured for a multi-axis system in which multiple motors are each associated with a different axis of motion, and multiple adaptive speed control systems are each associated with a different motor.
B60L 15/24 - Methods, circuits or devices for controlling the propulsion of electrically-propelled vehicles, e.g. their traction-motor speed, to achieve a desired performanceAdaptation of control equipment on electrically-propelled vehicles for remote actuation from a stationary place, from alternative parts of the vehicle or from alternative vehicles of the same vehicle train for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed with main controller driven by a servomotor
95.
SIGNAL GENERATION DEVICE AND SIGNAL GENERATION METHOD
One aspect of a signal generation device of the present invention includes N sensors that output N phase signals (N is a multiple of three) according to a rotation angle of a rotating body, and a signal processing unit that processes the N phase signal. The signal processing unit executes first processing of calculating a first N phase complex vector based on the N phase signals, second processing of transforming the first N phase complex vector into a first positive phase vector, third processing of calculating a second positive phase vector by normalizing, with a norm of the first positive phase vector, a real axis component and an imaginary axis component of the first positive phase vector obtained in the second processing, and fourth processing of inversely transforming the second positive phase vector obtained in the third processing into a second N phase complex vector.
G01D 5/14 - Mechanical means for transferring the output of a sensing memberMeans 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 convertingTransducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
In a cooling device, a main body is capable of being in thermal contact with a heat source and includes a flow path for refrigerant. A protruding portion protrudes from one surface of the main body to one side in a predetermined direction, and includes a hole extending from an end portion on the one side in the predetermined direction to the flow path. A joint is inserted into the hole, and includes a flow path connected to the flow path of the main body. A restricting portion restricts movement of the joint. A leak sensor is mounted on a substrate, and is capable of detecting liquid leakage. The substrate includes a first portion that is positioned on the one surface and around the protruding portion. The restricting portion includes a second portion protruding from the end portion of the protruding portion in an intersecting direction.
One aspect of a power conversion device of the present invention includes a power conversion circuit that performs mutual conversion between DC power and N-phase AC power (N is an integer of three or more), and a control unit having a first deformation mode for controlling the power conversion circuit by pulse width modulation based on an N-phase modulated waveform and a carrier waveform. In the first deformation mode, the control unit outputs the N-phase modulated waveform obtained by adding a first offset waveform W1(θ) expressed by Formula having, as variables, a sign Sgn (Sgn is 1 or −1), a first change rate K1, and a maximum value fmax(θ) and a minimum value fmin(θ) of an N-phase AC waveform at an electrical angle θ and the N-phase AC waveform, and the first change rate K1 of the first deformation mode is larger than 0 and smaller than 1.
H02P 27/08 - 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
98.
REFRIGERANT CIRCULATION DEVICE, COOLING DEVICE, AND PUMP UNIT
A refrigerant circulation device includes a primary flow path, a secondary flow path, a heat exchanger, a housing, a power connector, two inflow ports, and two outflow ports. The primary refrigerant flows through the primary flow path. The secondary refrigerant flows through the secondary flow path. The heat exchanger is connected to the primary and secondary flow paths. The housing includes two first outer side surfaces extending along a first direction in a plan view and two second outer side surfaces extending along a second direction intersecting the first direction, the housing accommodating the primary flow path, the secondary flow path, and the heat exchanger. The power connector is provided on and protrudes from the first outer side surface. The two inflow ports are positioned on the first outer side surface provided with the power connector and communicate with the primary flow path and the secondary flow path, respectively.
A motor according to an aspect of the present invention is a motor capable of switching the number of poles, and comprises: a rotor that can rotate about a central axis; and a stator that is positioned on the outer side of the rotor in the radial direction. The stator has a stator core facing the rotor with a gap therebetween in the radial direction, and a plurality of coil parts. The stator core has an annular core back part, and a plurality of tooth parts that protrude radially inward from the inner circumferential surface of the core back part, and are arranged along the inner circumferential surface of the core back part. The plurality of coil parts are attached to the plurality of tooth parts. The ratio of a radial dimension of the core back part to the minimum dimension of each of the tooth parts in a direction orthogonal to the radial direction is 142-352%.
A rotor includes a columnar rotor core extending in the axial direction, a rotor cover covering a radially outer side of the rotor core, and a resin portion covering a one-side end surface in the axial direction of the rotor core. The rotor cover includes a protruding portion protruding to one side in the axial direction with respect to the one-side end surface in the axial direction of the rotor core. The resin portion includes, on the radially outer side, an edge portion that protrudes to one side in the axial direction and is in contact with the radially inner side of the protruding portion.
