179results about "Suppressing electromagnetic interference" patented technology

The invention discloses a magnet vane for a magnetomotive generator set and a preparation method of the magnet vane, belongs to the technical field of magnet vanes, and aims to solve the problems that an existing magnet vane is prone to generating large eddy-current loss, and stress on the inner side and the outer side is unbalanced due to the fact that the layers of the novel magnet vane are arranged to be horizontal planes. Through the multi-layer composite structure of the supporting layer, the magnetic conductive layer and the diamagnetic layer, the total magnetic conductivity can be increased, an effective impedance matching interface can be formed, and through the arrangement of the inclined plane, the cooperation with the nanometer glue for bonding, the stress distribution and the laminating effect of the lamination are optimized, so that the lamination quality is improved. The wave-absorbing film is formed by compounding nanoscale magnetic particles and light organic polymers, the wave-absorbing performance is guaranteed, the weight of the magnetism isolating plate is greatly reduced, the requirement for light weight of electronic equipment is met, magnetic through holes are formed in the periphery of the magnetism isolating plate in a circular array mode, the forming area of the magnetic through holes is in a kidney shape and is increased from inside to outside, and the magnetic through holes are formed in the periphery of the magnetism isolating plate in a circular array mode. The magnetic through holes have ventilation and heat dissipation functions and directionally guide a magnetic field at the same time, and energy waste is reduced.

An electronic oil pump comprises a stator assembly and an electric control board assembly, the stator assembly is electrically connected with the electric control board assembly, the stator assembly comprises a stator core and a winding, the stator core can provide support for winding winding; the electronic oil pump comprises a shielding piece, the stator assembly, at least part of the shielding piece and the electric control board assembly are distributed along the axial direction of the electronic oil pump, at least part of the shielding piece is located between the stator assembly and the electric control board assembly; the material of the shielding piece is a conductive metal material, at least part of the shielding piece covers at least part of the winding; thus, it is beneficial to reduce the influence of the electromagnetic wave generated by the winding on the performance of the electric control board assembly.

A drive unit (1) comprising an electric machine (2) and an inverter (4) is described. The electric machine (2) includes a machine housing (3), a stator arranged therein, and a rotor rotatably mounted relative to the stator. The inverter (4) comprises an inverter housing part (5) with an inverter circuit (7) arranged thereon, and a busbar holder (8) for maintaining an electrical connection between the inverter (4) and the electric machine (2), the inverter housing part (5) being mounted on the machine housing (3).The busbar holder (8) is positioned via a first positioning pin (P1) and a second positioning pin (P2), wherein the first positioning pin (P1) is fitted in the inverter housing part (5), in the busbar holder (8), and in the machine housing (3), and the second positioning pin (P2) is fitted in the inverter housing part (5) and in the busbar holder (8) without being fitted in the machine housing (3). Furthermore, a vehicle (13) with such a drive unit (1) is specified, as well as a method for manufacturing such a drive unit (1).

The utility model provides a kind of plastic shell electronic oil pump, including plastic shell, motor stator, PCB board, metal back cover, ground terminal and ground copper bar;The lower end of ground terminal is connected with motor stator core, and upper end is welded with PCB board;Metal insert is injection molded outside plastic shell;One end of ground copper bar is welded with PCB board, and the other end is connected with metal insert.The electronic oil pump provided by the utility model has the advantages of lightweight, high power density, low cost, etc., and can meet the CLASS3 requirement of EMC parts.

The utility model discloses a shielding structure and a motor, and relates to the technical field of motors. The shielding structure comprises a shell assembly, a light guide part and a limiting part. The shell assembly comprises a first metal shell and a second metal shell; the light guide piece is arranged between the first metal shell and the second metal shell; the limiting piece is arranged in the light guide piece in a penetrating mode and connected between the first metal shell and the second metal shell in an abutting mode, and the size of the limiting piece in the axial direction of the shielding structure is larger than that of the light guide piece in the axial direction of the shielding structure. According to the shielding structure provided by the invention, the possibility that the light guide part is extruded and damaged by the shell assembly can be reduced, the electric continuous lap joint area can be increased, the grounding impedance is reduced, and the electromagnetic compatibility of the motor is improved.

A drive device according to the present disclosure includes: a motor including a motor main body having a rotor and two sets of windings, a frame configured to accommodate the motor main body, and a housing fitted to the frame; and a control unit attached to the motor and configured to control a current supplied to the two sets of windings, in which the control unit includes a wiring board having a first surface facing the housing and a second surface opposite to the first surface, a first inverter circuit and a second inverter circuit configured to independently supply a current to each of the two sets of windings, and a CPU configured to control the first inverter circuit and the second inverter circuit, a first switching element constituting the first inverter circuit is disposed on the first surface of the wiring board, and a second switching element constituting the second inverter circuit is disposed on the second surface of the wiring board.

The invention discloses an end effect suppression device, a design method and a cylindrical permanent magnet linear motor, and relates to the technical field of linear motors, the end effect suppression device comprises a magnetic circuit compensation structure installed at at least one end of a primary motor; the magnetic circuit compensation structure consists of at least two layers of sleeves which are concentrically nested and are made of a high-permeability material, and an axial guide mechanism is arranged between adjacent sleeve layers, so that the inner-layer sleeve can slide along the axial direction of the motor relative to the outer-layer sleeve; the outermost layer of sleeve is fixedly connected with the end part of the primary, and the innermost layer of sleeve is arranged to be capable of keeping coupling with the secondary in the operation process of the motor, so that continuous magnetic circuit connection is formed among the secondary, the magnetic circuit compensation structure and the primary, and an air gap magnetic field at the end part of the primary is guided and reconstructed. According to the invention, the end magnetic field distortion and magnetic resistance are directly suppressed from the physical level, and the output stability, control precision and environmental adaptability of the motor are improved.

The application discloses a solderless connection integrated motor and a blender, which comprises a circuit board and a motor body, the motor body comprises a motor shell and an end cover assembly; the end cover assembly comprises an end cover, an EMC element and a flexible connecting body, the end cover is installed on the motor shell, and the EMC element is arranged outside the end cover; the flexible connecting body is inserted into the end cover and fixes an A-end pin of the EMC element on the end cover; the circuit board is inserted on the end cover, and the A-end pin of the EMC element is in conductive connection with the circuit board through the flexible connecting body; a B-end pin of the EMC element penetrates through the end cover and extends downwards and is in conductive connection with the motor shell. The solderless connection integrated motor and the blender are simple in assembly, low in cost and suitable for automatic production.

Power electronic device (11) comprising a semiconductor switch (15) and a sensor module (1) which is in thermal contact with the semiconductor switch (15) and has at least one measuring transmitter (2), wherein the sensor module (1) has at least one interference suppression element (3) for reducing interference signals, wherein the sensor module (1) has an input contact (6) and an output contact (7), wherein the measuring transmitter (2) and the interference suppression element (3) are arranged in a parallel circuit (8), wherein the parallel circuit (8) is electrically connected on the one hand to the input contact (6) and on the other hand to the output contact (7), wherein the input contact (6) and the output contact (7) are each designed as an unshielded cable (9).

The utility model relates to the field of magnetic rings for motors, and discloses a magnetic ring for a high-strength transmission motor. The end, opposite to the buffering connector, of the connecting rod is provided with an inserting rod, a through groove is formed in the inserting rod, a reset spring is installed in the through groove, the two ends of the reset spring are connected with fixing clamping blocks, and the end, close to the first half magnetic ring body, of the second half magnetic ring body is provided with an adaptive clamping sleeve. An adjusting slot matched with the fixed clamping block is formed in the surface of the adaptive clamping sleeve; the distance between the first semi-magnetic ring body and the second semi-magnetic ring body is adjusted according to specific installation requirements, during adjustment, the distance between an insertion rod and an adaptive clamping sleeve can be adjusted by pressing a fixing clamping block inwards, then an anti-disengaging fixing screw is screwed into an anti-disengaging threaded hole, anti-disengaging fixing can be conducted on the fixing clamping block from the side edge, and the anti-disengaging effect is achieved. In the using process, even if large vibration occurs, falling is not prone to occurring, and the stability of the whole device in the using process is improved.

An EMI filter including a core forming a closed magnetic circuit, the core having first, second and third stems extending in parallel directions, the second stem being disposed between the first and third stems. The ends of the stem are connected by first and second bridge legs. A first coil, which is part of the first DC power line conductor, is disposed around the first stem and / or the first bridge leg. A second coil, which is part of a DC power line conductor, is disposed around the third stem and / or the second bridge leg. The compensation winding is arranged on the core and comprises a first compensation coil and a second compensation coil, the first compensation coil is arranged around the first core column and / or the first bridge leg, and the second compensation coil is arranged around the third core column and / or the second bridge leg for inducing a magnetic flux density in the second core column in the following direction. The direction is opposite to the direction of the magnetic flux density generated in the second stem by the direct current supplied through the first coil and through the second coil for reducing the resulting magnetic flux in the second stem.

A drive device includes a magnetic circuit unit including a first yoke, a second yoke, and a first magnet, a magnetic circuit unit including the first yoke, the second yoke, a second magnet, a first coil that is bonded to a focus lens, in which the magnetic circuit units drive the first coil and the focus lens by an electromagnetic force generated in the first coil, the first magnet corresponds to a first movement amount of movement of the focus lens, and the second magnet corresponds to a second movement amount of movement of the focus lens.

The shaft of the motor is provided with: a cylindrical first shaft extending in the axial direction; a cover portion disposed at one axial end portion of the first shaft; a second shaft extending in one axial direction from the cover part; the first shaft through hole penetrates through the first shaft in the radial direction; and a second shaft through hole communicating with the inside of the first shaft and the outside space of the shaft. The cover portion and the second shaft are electrically conductive. The second shaft through hole is disposed closer to one side in the axial direction than the first shaft through hole. The second shaft is in contact with a de-energizing device electrically connecting the shaft with the housing of the motor.

The present disclosure relates to a choke system for reducing common mode current in an AC drive system. The present disclosure addresses common mode current and bearing current in an alternating current (AC) drive system by using an AC choke assembly integrated with a shielded coaxial electrical cable. This design weakens common mode current and ensures electromagnetic compatibility. The AC choke assembly includes a magnetic core with an axial bore that receives a coaxial electrical cable. The cable is surrounded by a metal housing and insulated by a dielectric separator. An optional dielectric outer cover may further insulate the metal housing. Thermal interface pastes may be used to maximize heat transfer between layers of an AC choke. One side of the metal housing is connected to the first set of coaxial cable shield ends, or the other side may be connected to a traction drive unit (TDU) or a traction power inverter module (TPIM). Alternatively, the AC choke may be located in a middle section of the coaxial cable.

To provide an EMC filter with reduced noise level on an output side.SOLUTION: An EMC filter component with improved noise levels is provided. The component includes a first interface, a second interface, a filter circuit, and / or a mechanical connection. The filter circuit is electrically connected between the first interface and the second interface. The mechanical connection is provided and configured to mechanically connect the component to an external mounting location. The mechanical connection is also provided and configured to electrically connect the filter circuit to a ground potential of the external mounting location.SELECTED DRAWING: Figure 1

The utility model provides a driving device which comprises a tubular shell, and the two ends of the tubular shell are fixedly connected with a first end cover and a second end cover respectively. A driving assembly is arranged in the tubular shell, and one end of the driving assembly is fixedly connected to the first end cover; a second limiting piece and a first circuit board are further arranged in the tubular shell, and the second limiting piece is used for limiting the first circuit board; the driving assembly and the first circuit board are installed from the two ends of the tubular shell respectively. A detection circuit board is arranged between the driving assembly and the first end cover, the detection circuit board is electrically connected to the first circuit board through a flexible connecting piece, the flexible connecting piece deforms to be matched with the driving assembly during assembly, and the conductivity between the detection circuit board and the first circuit board is kept in any form of deformation. The driving device provided by the utility model is low in assembly difficulty and more stable in connection.

A vehicle is provided that includes a traction motor. The traction motor includes a direct current capacitor (DC capacitor) and a printed power circuit board (power PCB) that converts the direct current power (DC power) received by the DC capacitor into alternating current power (AC power). The traction motor also includes a stator with windings. The traction motor further includes a first phase connection, a second phase connection, and a third phase connection arranged between the power PCB or power module and the stator windings. The first, second, and third phase connections provide an electrical connection between the power PCB or power module and the stator windings and are arranged in a triangular configuration to supply AC power to the stator windings.The traction motor also includes a triangular AC choke that encloses the first phase connection, the second phase connection and the third phase connection in the triangular configuration.

Electrical machine arrangement comprising an electric machine for driving an electrically powered motor vehicle, comprising a stator and a rotor, wherein the rotor is rotatably mounted within the electrical machine arrangement via at least one bearing point, wherein the rotor has a rotor shaft (2), one end (3) of which has a shaft grounding element (8) and a rotor position sensor within the axial longitudinal extent (6) of the rotor shaft (2).

A motor device (31) includes: a motor (40); a first circuit board (51) provided at an axial end of the motor (40); a second circuit board (52) that is disposed at a position farther from the motor (40) than the first circuit board (51) in an axial direction of the motor (40) and that faces the first circuit board (51); an inter-board connector (62A, 62B, 85A, 85B) that connects the first circuit board (51) and the second circuit board (52); and a plurality of terminals (53E, 53F, 53G) configured to supply electric power or a signal to the first circuit board (51) and the second circuit board (52). The plurality of terminals (53E, 53F, 53G) is connected to the second circuit board alone.

This invention provides improved or alternative EMI filter circuits and methods for filtering electromagnetic interference (EMI) within the circuits. [Solution] The EMI filter has a first core pillar 1, a second core pillar 2, and a third core pillar 3 extending in parallel directions to form a closed magnetic circuit, the ends of each core pillar being connected by first and second bridging legs 6, 7. A first coil 9, which is part of a DC power line conductor, is arranged around the first core pillar and / or the first bridging leg, and a second coil is arranged around the third core pillar and / or the second bridging leg. The EMI filter further comprises first and second compensation coils 25, 26, the first compensation coil being arranged around the first core pillar and / or the first bridging leg, and the second compensation coil being arranged around the third core pillar and / or the second bridging leg, in order to reduce the magnetic flux generated in the second core pillar by the first and second coils.

To provide a motor capable of reducing common mode current.SOLUTION: The motor comprises: an electric motor; an inverter that drives the electric motor; a noise reduction unit that reduces common mode noise; a control unit; and a metal housing. The electric motor has a three-phase coil. The inverter has a switching element. The noise reduction unit is provided closer to an input side than the inverter. The control unit controls the switching element by using a PWM signal generated on the basis of a voltage command value and a carrier frequency. The housing stores the electric motor, the inverter, the noise reduction unit, and the control unit. The housing is grounded to a body of a vehicle. The control unit includes a calculation unit that calculates a modulation factor of the voltage command value, and a setting unit that sets the carrier frequency in accordance with the modulation factor calculated by the calculation part. The setting part sets, if the modulation factor is lower than a prescribed modulation factor, a carrier frequency higher than that when the modulation factor is equal to or higher than the prescribed modulation factor.SELECTED DRAWING: Figure 5

A magnetic shielding plate for a magnetic power generator set and its preparation method belong to the field of magnetic shielding plate technology. To address the problems of existing magnetic shielding plates easily generating large eddy current losses, and the uneven force distribution caused by the horizontal plane layering of this novel magnetic shielding plate, this invention utilizes a multi-layer composite structure of a support layer, a magnetically conductive layer, and an antimagnetic layer. This not only increases the total permeability but also forms an effective impedance matching interface. The inclined surface, combined with nano-adhesive bonding, optimizes the force distribution and the bonding effect of the stacked plates. The absorbing film is made of nano-scale magnetic particles and lightweight organic polymer composites, ensuring absorption performance and significantly reducing the weight of the magnetic shielding plate to meet the lightweight requirements of electronic devices. Through the opening of magnetic flux holes, the magnetic shielding plate has a circular array of magnetic flux holes around its perimeter, with the hole area being waist-shaped and increasing from the inside out. The magnetic flux holes provide ventilation and heat dissipation while directionally guiding the magnetic field, reducing energy waste.

A rotary electric device of the present disclosure includes: a rotary electric machine including a rotating shaft; a control unit disposed side by side with the rotary electric machine in an axial direction along an axis of the rotating shaft and configured to control the rotary electric machine; and an electromagnetic shield covering the control unit. The control unit includes a control board extending in the axial direction, an external connection terminal being connected to the control board, and a filter configured to attenuate a noise component to be propagated to the external connection terminal. The electromagnetic shield is formed in a tubular shape covering the entire control board and including a first top portion provided with a through-hole into which the external connection terminal is inserted, and a second top portion disposed closer to the rotary electric machine than the first top portion. At least a part of the filter is mounted on the control board and is disposed between the first top portion and the second top portion in the axial direction.

The invention relates to the technical field of motors, in particular to a two-pole magnetic suspension permanent magnet high-speed winding structure which comprises a stator core and three-phase windings, a plurality of stator grooves are annularly formed in the inner surface of the stator core at equal intervals with the axis of the stator core as the center, the stator grooves are equally distributed in two poles, the number of the three-phase windings is multiple, and the number of the three-phase windings is multiple. Each phase winding is wound in a stator slot, 12 layers of windings are arranged in each stator slot, two branches of each phase winding are canceled, the other four branches are connected in parallel, and the current directions of the four branches connected in parallel are the same. According to the technical scheme, uniform magnetic field distribution can be kept while the motor operates efficiently, and good mechanical stability and thermal management performance are provided.

The invention discloses a punching sheet, a stator core, a stator, an actuator, a suspension system and a vehicle, relates to the technical field of vehicles, and aims to solve the problem that the magnetic leakage phenomenon is relatively serious when the actuator works. And the punching sheet is used for the end part of the stator iron core. The outer end face of the punching sheet is provided with a magnetic isolation part, and the magnetic isolation part and the first outer edge of the punching sheet are arranged at an interval.

The utility model provides a brushless motor with an improved bearing seat structure, and relates to the technical field of brushless motors, the brushless motor comprises a motor body, a stabilizing mechanism and a grounding mechanism, the stabilizing mechanism comprises a hollow pipe and wiping cotton, the wiping cotton is embedded in the hollow pipe, the hollow pipe and the wiping cotton are used for lubricating the output end of the motor body, and the grounding mechanism is connected with the motor body. Friction force is reduced, and stability of the motor body during rotation is improved; the grounding mechanism comprises a wire winding plate and a grounding plate, the grounding plate is located behind the wire winding plate, and the wire winding plate and the grounding plate are used for effectively preventing electromagnetic interference on the motor body. And meanwhile, redundant electromagnetism in the motor body can be conducted to the ground by utilizing the grounding plate, so that the normal operation of the motor body can be prevented from being influenced by external electromagnetic interference.

The utility model discloses a motor end cover which comprises an end cover body and a conductive assembly, the end cover body is provided with a cavity, and the conductive assembly is arranged in the cavity. The conductive assembly comprises a circuit board arranged at one end of the cavity, two first conductive sheets symmetrically arranged at one end of the circuit board, inductors arranged at the two sides of the cavity and second conductive sheets arranged at one ends of the inductors, conductive blocks are arranged at the ends, close to the first conductive sheets, of the circuit board, and the first conductive sheets comprise conductive parts vertically arranged corresponding to the conductive blocks; the conductive part abuts against the conductive block, so that one end of the inductor is electrically connected with the conductive block through the conductive part, and the other end of the inductor is electrically connected with the second conductive sheet. The conductive part abuts against the conductive block so that one end of the inductor can be electrically connected with the conductive block through the conductive part, the conductive block directly abuts against the conductive part, and it can be ensured that current can be transmitted among the circuit board, the first conductive piece and the inductor more directly and efficiently.

A motor assembly includes a brushless electric motor including a motor stator and a motor rotor configured for rotating within the motor stator. The motor stator includes a plurality of windings. The brushless electric motor also includes a rotor shaft non-rotatably connected to the motor rotor for rotating with the motor rotor and a resolver position sensor including a resolver stator and a resolver rotor configured for rotating within the resolver stator. The resolver rotor is non-rotatably connected to the rotor shaft for rotating with the rotor shaft. The resolver stator generates a signal based on a rotational position of the resolver rotor. The brushless electric motor also includes a rotor shaft bearing coupled to the rotor shaft and a bearing support supporting the rotor shaft bearing to allow the rotor shaft to rotate with respect to the bearing support. The bearing support is or includes an electromagnetic interference shield to reduce or block electromagnetic waves emitted by the windings of the motor stator from interfering with the signal generated by the resolver stator.

The invention relates to a stator (1) for an electric machine (2), said stator comprising an energizable stator winding (3), wherein a three-phase common-mode choke (4) is integrated in and / or on the stator (1).

Electromotive unit (EMU) comprising an electric machine including a rotor (9) and a rotor shaft (1) having a tubular body, the electromotive unit comprising a differential mechanism (DF) housed inside the rotor shaft, with a planet carrier element driven in rotation by the rotor shaft, a differential cover (7) inserted externally on the first axial end of the rotor shaft, the differential cover comprising an axial opening (72) allowing passage of a first drive shaft, a rotation sensor (92) mounted on the housing element, a rotating sensor target (8) arranged on the differential cover, with target patterns positioned opposite the rotation sensor (92), an electrical friction track (70) on the differential cover or on the sensor target (8), receiving friction from eyelashes or brushes connected to a stationary element in electrical coupling with the electrical ground of the electromotive unit.Figure from the summary: Fig.7.