525results about "Shielding from electromagnetic fields" patented technology

The utility model provides a cantilever type magnetic drive pump, and belongs to the technical field of pumps. The technical problem that an existing cantilever type magnetic drive pump is not good enough in sealing effect is solved. A cantilever type magnetic drive pump comprises a pump shell and a motor shell, a stator assembly is fixedly installed between the pump shell and the motor shell, a rotor assembly rotating relatively is embedded in the stator assembly, an impeller is fixedly connected to the rotor assembly, the stator assembly comprises a stator shielding sleeve and a stator assembly wrapped by the stator shielding sleeve, and a concave cavity is formed in the middle of the stator shielding sleeve. The bottom of the concave cavity protrudes towards the impeller to form an installation column, a reinforcing piece is arranged in the installation column, the rotor assembly is embedded into the concave cavity and fixedly and rotatably arranged outside the installation column in a sleeving mode, the installation column penetrates through the middle of the rotor assembly, and the impeller is fixedly connected to the rotor assembly. The sealing device is good in sealing effect and stable in rotation.

The invention relates to a drive (30) with - at least one dynamoelectric rotary machine (1) arranged in a housing (2), with a winding system (5) arranged in a stator (4) and a rotor (6) separated therefrom by an air gap (23), which is rotatably mounted about an axis (12) via at least one bearing (10) of a B-side cup-shaped end shield (7), wherein the stator (4) and rotor (6) are located in a motor interior (18) - at least one inverter, wherein the inverter comprises at least some of the following components, such as power semiconductors, chokes, capacitors, control and regulation units and communication units, and is located in an inverter installation space (13) which is radially surrounded at least partially by the B-side end shield (7), wherein at least some components of the inverter are thermally connected to the end shield (7), in particular by thermally connecting heat-intensive components of the inverter,are arranged on an inner side wall (20) of the pot-shaped bearing shield (7), - wherein the converter is arranged axially between the dynamo-electric rotary machine (1) and the bearing of the B-side pot-shaped bearing shield (7), - wherein the motor interior (18) and the converter installation space (13) are separated by a shielding element (16).

An actuator includes a movable body including: a disk-shaped magnet, a pair of disk-shaped yokes fixed to front and back surfaces of the disk-shaped magnet, a pair of spring retaining parts connected at one ends to the disk-shaped yokes, respectively, and connected at other ends to central portions of circular leaf springs, respectively, and a protruding part protruding in an axial direction of the disk-shaped magnet from the other end of one spring retaining part of the pair of spring retaining parts; and a fixing body including: a coil disposed at an outer circumference of the movable body, and a case including an opening portion through which the protruding part is inserted, the case accommodating the coil and the movable body such that a protruding end side of the protruding part protrudes to an outside.

The invention relates to a direct current motor with an anti-electromagnetic interference structure in the field of motors, which is characterized in that the surfaces of a commutator and an electric brush are blown in real time through a magnetic shielding cylinder arranged on the outer side of the commutator and an air blowing blade arranged in the magnetic shielding cylinder, and carbon powder on the surfaces of the commutator and the electric brush is cleaned; the commutator and the electric brush are subjected to synchronous blowing heat dissipation, so that the commutator and the electric brush have relatively good contact stability, the condition of contact resistance increase caused by carbon powder accumulation is reduced, the probability of arc generation between the commutator and the electric brush is reduced, and the electromagnetic compatibility of the motor is further improved; the influence of a high-frequency magnetic field generated by the arc on a rotor winding coil is reduced, and electromagnetic interference is further reduced; in addition, the insulating groove formed in the commutator improves the collecting and cleaning effects of the carbon powder, and the insulating groove is matched with the diversion disc to realize ejection of the lower contact surface of the electric brush, so that the cleaning effect of the carbon powder is further improved.

An electric machine comprises a stator, a rotor, an air gap between the stator and rotor (spacing them apart), and a shielding structure to reduce capacitive coupling between the stator and rotor. The shielding structure is coupled to a reference potential. Located within the air gap, the shielding structure comprises multiple conductors. Each conductor has a first section, the longitudinal extents of which extend transversely to the magnetic flux direction of the electric machine. Each conductor also has a second section, the longitudinal extents of which extend in a comb-like or meandering pattern, interlocked transversely to the magnetic flux direction and in a direction different from the longitudinal extents of the first sections.

The objective of the present disclosure is to realize downsizing of the bus-bar holder, and then to downsize an electric rotating machine apparatus and an electric power steering apparatus. In a first protruding portion of the bus-bar holder, there are provided a columnar portion, two or more first ribs that are provided on an outer circumferential surface of the columnar portion in such a way as to be parallel with a center axis of the columnar portion and in such a way as to be spaced apart from one another, and two or more second ribs; the first rib makes contact with an inner circumference surface of a first through hole of the control circuit board; the second rib makes contact with an inner circumference surface of a second through hole of the bus bar.

A position detector includes a position detection magnet unit installed at each of a plurality of carriers, and a position detection unit. The position detection magnet unit includes a plurality of magnets disposed such that different magnetic poles are arranged alternately in a transport direction of the carriers, and side magnetic shielding portions installed at the ends of the position detection magnet unit. The position detection unit includes: a processing substrate disposed in parallel to the transport direction of the carriers; a plurality of magnetic detection elements disposed side by side in the transport direction of the carriers on a front side of the processing substrate; and a substrate-side magnetic shielding portion opposite the magnetic detection elements, the substrate-side magnetic shielding portion being installed on a back side of the processing substrate.

The invention discloses a brushless direct current motor and a control method thereof, and relates to the technical field of motor equipment.The brushless direct current motor comprises a motor shell and further comprises a driving circuit, and the driving circuit is located in the motor shell. A protective cover is arranged on the outer side of the rotor mounting cover, and a positioning clamping seat is arranged on one side of a heat dissipation fan blade to reinforce and mount the motor shell and the rotor mounting cover, so that the connection stability of equipment in use is improved; the auxiliary mounting mechanism is arranged, the motor shell and the mounting side plate are subjected to reinforced connection treatment through the first connecting shaft, and daily maintenance treatment can be conveniently carried out on the whole; according to the invention, the MCU unit is used for receiving the position feedback from the Hall sensor, and the MCU unit can control the current switching of the stator winding, so that a rotating magnetic field is generated to drive the rotor to rotate, and the error is the difference between a target value and an actual value.

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.

The utility model discloses a miniature motor with strong anti-electromagnetic interference performance, comprising a motor casing, the inner wall of the motor casing is fixedly connected with a first shielding arc plate and a second shielding arc plate in sequence from front to back, and the outer surface of the motor casing is fixedly connected with an upper flux sleeve and a lower flux sleeve in sequence from top to bottom. The upper surface of the motor shell is fixedly connected with an upper shielding cover, and the lower surface of the motor shell is fixedly connected with a lower shielding cover. The first shielding arc plate, the second shielding arc plate, the upper magnetic conductive sleeve and the lower magnetic conductive sleeve are used for inner layer protection and outer layer protection of the micro motor respectively; the upper shielding cover and the lower shielding cover are used for protecting the ends at the two ends of the micro motor respectively, the first shielding arc plate and the second shielding arc plate provide main double-layer strong anti-electromagnetic interference with the upper magnetic conductive sleeve and the lower magnetic conductive sleeve, and the upper shielding cover and the lower shielding cover are used for assisting in providing anti-electromagnetic interference for the ends. Therefore, anti-electromagnetic interference at the inner layer, the outer layer and the end of the micro motor is provided.

The invention discloses a permanent magnet direct-drive top drive motor and an installation method thereof, belongs to the technical field of direct-drive permanent magnet motors, and aims to solve the technical problem of poor heat dissipation performance of a permanent magnet direct-drive top drive motor in the prior art. The motor comprises a main shaft, a stator assembly, a rotor assembly, a cooling assembly and a shell. The rotor assembly comprises a rotor core and a rotor support. The main shaft is connected with the rotor core through the rotor support. The cooling assembly comprises a draught fan, an air guide barrel connected with the output end of the draught fan and an air guide piece arranged in the shell. The air guide sheets and the inner wall of the shell form a first cooling flow channel; the shell comprises an upper end cover and a lower end cover, and a plurality of first ventilation holes are formed in the lower end cover. Cooling air is input by the draught fan, passes through the air guide barrel and the first cooling flow channel and then is output through the first ventilation hole. The permanent-magnet direct-drive top-drive motor provided by the invention is convenient to assemble, high in reliability, good in overall heat dissipation efficiency and long in service life.

The invention discloses a flexible motor. The flexible motor comprises a housing; the stator assembly is arranged in the shell; the outer rotating sleeve is rotationally connected into the shell, and a rotor assembly is arranged on the outer side of the outer rotating sleeve; the inner rotating shaft is rotationally connected into the outer rotating sleeve, a first clutch assembly is arranged between the bottom of the inner rotating shaft and the bottom side of the shell, a second clutch assembly is arranged between the inner rotating shaft and the outer rotating sleeve, the top end of the inner rotating shaft upwards extends out of the outer rotating sleeve and the shell, and the top end of the inner rotating shaft is rotationally connected with an output rod along the axis in the horizontal direction; a transmission assembly is arranged between the output rod and the outer rotating sleeve, and when the outer rotating sleeve rotates, the inner rotating shaft can be driven to rotate through the transmission assembly, and through control over the first clutch assembly and the second clutch assembly, the output rod can rotate along the axis of the output rod so as to output power; or the inclination angle can be adjusted according to use requirements so as to achieve the purposes of autorotation, reciprocating swinging or supporting and the like.

The utility model provides a heat dissipation structure of a magnetic drive pump, and belongs to the technical field of pumps. The technical problem that heat of a frequency conversion device and heat of a motor in an existing magnetic drive pump are prone to mutual influence in the same space is solved. A heat dissipation structure of a magnetic drive pump comprises a stator assembly and a rotor assembly which are integrally formed, the stator assembly is fixed between a pump shell and a motor shell, the stator assembly and the pump shell define a pump cavity, the stator assembly and the motor shell define a frequency conversion cavity, the pump cavity and the frequency conversion cavity are not communicated, and a frequency conversion device is arranged in the frequency conversion cavity. The frequency conversion device is fixedly connected with a frequency conversion partition plate, the frequency conversion partition plate is fixedly connected with the stator assembly, a heat dissipation channel is formed between the frequency conversion partition plate and the stator assembly, and heat dissipation through holes are formed in the motor shell relative to the heat dissipation channel. According to the utility model, the heat transfer between the frequency conversion device and the motor in the magnetic drive pump is reduced, so that the heat dissipation of the whole machine is better.

The invention relates to a high-efficiency amorphous motor, and the motor comprises a motor housing which is provided with an accommodation cavity; the shaft core is rotatably arranged on the motor shell in a penetrating manner; the wiring board is fixedly connected to the inner wall of the containing cavity, and the wiring board is perpendicular to the shaft core; the winding frame is connected to the axial end face of the wiring board, the winding frame is in a hollow ring shape, and a coil is spirally wound around the winding frame in the ring-shaped surrounding direction of the winding frame; the stator core is arranged in the inner cavity of the reel; and the rotor is sleeved on the shaft core. The motor has the effects of reducing copper loss and improving the efficiency of the motor.

The invention relates to a modular suspension axial magnetic flux shielding pump which comprises a pump shell and a machine shell installed on the pump shell, a pump cavity is formed in the pump shell, a water inlet and a water outlet are formed in the pump shell, a pump shaft is fixedly arranged in the center of the machine shell and extends into the pump cavity, an impeller rotationally installed on the pump shaft is arranged in the pump cavity, and a motor is arranged in the pump cavity. A rotor mounting groove is formed in the surface, facing the machine shell, of the impeller, a rotor module is arranged in the rotor mounting groove, and a rotor shielding sleeve for sealing the rotor mounting groove is arranged on the impeller; a stator installation groove is formed in the machine shell around the pump shaft, a stator module is arranged in the stator installation groove, the stator module and the rotor module are oppositely arranged, and a stator shielding plate for sealing the stator installation groove is arranged on the machine shell. The planar circular ring stator shielding plate is adopted, the manufacturing cost is reduced, the assembly process effect is simplified, the machine shell adopts bilateral water cooling, the motor power density is improved, the motor cost effect is reduced, the stator and rotor modular design is achieved, the rotor module rotates, the pump shaft is fixed, and assembly is simple.

A motor includes a motor control circuit having a ground terminal, and a current limiting part disposed on a path electrically connecting the ground terminal and an external ground terminal included in an external circuit disposed outside the motor.

An electric pump comprises a stator assembly, the stator assembly comprises a stator core and a winding, the winding comprises a main body section, a first section and a second section, the main body section connects the first section and the second section; the stator core comprises a core tooth part, a core yoke part and a core neck part, the core yoke part is located at the outer periphery of the winding; a first reference plane is defined, the first reference plane coincides with the axial center axis of the core tooth part and the axial center axis of the core neck part, a section of the stator assembly is made along the first reference plane, the upper end of the section of the main body section is flush with the upper end of the section of the core yoke part body part, the lower end of the section of the main body section is flush with the lower end of the section of the core yoke part body part; the electric pump further comprises a shielding piece, the material of the shielding piece is a conductive metal material, at least part of the shielding piece is located at the outer periphery of at least one of the first section and the second section; thus it is beneficial to reduce the electromagnetic waves radiated to the outside, thereby it is beneficial to reduce the interference of the electric pump to the outside.

The utility model discloses a stepping motor with drive control, which comprises a motor body and an integrated wire protection box, the motor body comprises a shell and a top cover, the shell is also provided with an open slot, the integrated wire protection box is fixed on the motor body, a drive control unit is arranged in the integrated wire protection box, and the drive control unit is fixed on the motor body. The open slot is communicated with the integrated wire protection box, a plurality of phase wire needles are fixed on the motor body, and the phase wire needles are led out from the open slot to be connected with a driving control unit in the integrated wire protection box. By arranging the driving control unit in the integrated wire protection box, on one hand, the integrated wire protection box plays a role in connecting an external power supply and a bridge of the motor body, and the working requirement of the motor body can be met without finding a matched driving control unit; and on the other hand, the integrated wire protection box is fixed on the open slot of the motor body through the connecting part, and the extension position is further arranged to completely wrap the open slot, so that better protection and anti-interference effects on the motor body are achieved.

A motor control unit, an electric drive assembly and a vehicle. The motor control unit includes a cooling assembly, a power assembly and a filtration assembly, where the cooling assembly includes a box, the box including a cooling portion, a first mounting portion and a second mounting portion, the first mounting portion being on a side of the cooling portion in a first direction, and the second mounting portion being on the other side of the cooling portion opposite the first mounting portion in the first direction. The power assembly is mounted at the first mounting portion, and the filtration assembly is mounted at the second mounting portion, such that the cooling portion simultaneously cools the power assembly and the filtration assembly.

An electric assembly includes a box body, an N-line connecting assembly, a motor, an electric control module, and a direct-current connector. The box body comprises an electric control cavity. One end of the N-line connecting assembly is suitable for being connected between two battery packs connected in series. The motor comprises a three-phase winding, one end of the three-phase winding is a junction end, which is connected to the other end of the N-line connecting assembly. The electric control module comprises an IGBT module having a three-phase bridge arm, and the other end of the three-phase winding is connected to a middle point of the three-phase bridge arm. A positive electrode of the direct-current connector is connected to the junction end, and a negative electrode of the direct-current connector is connected to the IGBT module and is suitable for being connected to negative electrodes of the battery packs.

To simplify assembly and to reduce the susceptibility to faults of a linear drive comprising a transmission housing, an interference-suppressed electric motor which is connected thereto and is accommodated in a motor housing and which by way of a rotor accommodated in the motor housing drives a shaft which is mounted on a rear shaft end in a rear shaft bearing and is mounted on a front shaft end, a commutator for the transmission of current to the rotor, electrical and / or electronic components for interference suppression of the electric motor, it is proposed that the rear shaft bearing is mounted in the motor housing, the front shaft bearing is mounted in the transmission housing and the electrical and / or electronic components required for interference suppression of the electric motor are arranged on an interference suppression circuit board arranged between the front shaft bearing and the commutator.

The present invention discloses a horizontal rotary test bench for logging while drilling instruments, which improves the technical problem of electromagnetic interference to logging instruments. The device comprises a front support seat, a middle support seat and a rear support seat which are arranged in sequence, and a limiting part is respectively arranged on the middle support seat and the rear support seat, and the two limiting parts are used to jointly support and limit the logging instrument and keep the logging instrument horizontal; a shielding box is arranged on the front support seat; a power shaft, one end of which is located inside the shielding box and the other end extends to the outside of the shielding box; a motor power source is arranged in the shielding box and is used to control the rotation of the power shaft; a transmission part, one end of which is connected to the power shaft and the other end is used to connect to the logging instrument, and the transmission part is used to transmit the torque of the power shaft to the logging instrument, so that the logging instrument rotates along its own axis. The present invention can reduce electromagnetic interference, ensure the debugging accuracy of the logging instrument, and thus ensure the smooth progress of the drilling operation.

According to the non-magnetic stator tooth high-temperature superconducting synchronous phase modifier and the determination method, a plurality of superconducting excitation windings are arranged between a rotor magnet yoke and a superconducting shielding layer along the circumferential array of the rotor magnet yoke, and each superconducting excitation winding is connected with a superconducting excitation winding cooling structure and an excitation winding structure wound by a high-temperature superconducting strip; the superconducting excitation winding cooling structure is arranged on the excitation winding to maintain the excitation winding to operate stably at the set temperature, so that active power loss and temperature rise of the excitation winding are avoided, the superconducting excitation winding has high excitation capacity, the air gap magnetic flux density of the high-temperature superconducting synchronous phase modifier is as high as 1.6 T, and the high-temperature superconducting synchronous phase modifier can be applied to the high-temperature superconducting synchronous phase modifier. Therefore, when the radial sizes are roughly the same, the axial size of the high-temperature superconducting synchronous phase modifier can be greatly reduced, and under the condition of the same power, the axial size of the high-temperature superconducting synchronous phase modifier is about one half of that of an existing synchronous phase modifier, and miniaturization of the synchronous phase modifier is facilitated.

Electric machine (10), in particular for adjusting movable parts in a motor vehicle, having a stator housing (22) which accommodates a stator (12) and a rotor (14), wherein the rotor (14) has a rotor shaft (16), and the stator housing (22) has an axial opening (24) through which the rotor shaft (16) projects out of the stator housing (22), wherein an electrically conductive shielding plate (29) is arranged transverse to the rotor shaft (16) and substantially covers the entire opening (24), and an electrically conductive sliding contact (77), which is electrically conductively connected to the shielding plate (29), is formed on the rotor shaft (16).

The utility model provides a coil assembly and an electronic expansion valve with the same, the coil assembly comprises a stator assembly, the stator assembly comprises a stator housing and a winding, the winding is arranged in the stator housing, and the stator housing is made of conductive material and magnetic conductive material; the wiring terminal is partially located on the outer side of the stator shell, and the wiring terminal is electrically connected with the winding; the wire harness comprises a shielding layer and a wire, one end of the wire is electrically connected with the wiring terminal, the other end of the wire is used for being electrically connected with wiring equipment, the shielding layer wraps the outer side of the wire and is provided with a conductive material, the end, close to the wiring terminal, of the shielding layer is a connecting end, the connecting end is electrically connected with the stator shell, and the shielding layer can be grounded. According to the technical scheme of the utility model, the problem of poor anti-electromagnetic interference capability of the coil assembly in the prior art can be solved.

Disclosed are a non-contact rotary transformer and a motor comprising same. A non-contact rotary transformer according to the present invention is a device for connecting a rotor of a motor with an external power source in a non-contact manner, and is characterized by comprising: a core part disposed inside a hollow motor shaft in a coaxial structure with the motor shaft; a primary coil part installed on the outer circumferential surface of the core part; a secondary coil part which is installed on an inner main surface of the motor shaft and surrounds the primary coil part at a predetermined interval (air gap) therefrom; and a rectifier circuit part which is coupled to the motor shaft and rotates in synchronization therewith, and which is electrically connected to the secondary coil part.

A linear motor conveyor system including: a moving element comprising at least one magnetic element and at least one bearing; a first track comprising a first linear motor, the first track configured to have a first rail on which the at least one bearing of the moving element runs and the first linear motor is configured to generate a dynamic magnetic field which acts on the magnetic element; a second track having at least a transfer region positioned adjacent the first track, the second track configured to have a second rail on which the same at least one bearing runs while in the transfer region.

The invention belongs to the technical field of flat wire motors, and provides a winding structure based on a flat wire conductor, which comprises a stator core and a three-phase coil, a plurality of stator grooves are formed in the inner surface of the stator core, three-phase coils are installed in the stator grooves, the three-phase coils are divided into n layers from the groove bottoms of the stator grooves to groove openings, and n is larger than 1. The three-phase leading-out ends of the other three-phase coils are located on the ith layer, n > = i > = 1, and the neutral ends are located on any adjacent layer of the three-phase leading-out ends; the three-phase leading-out end is connected with a leading-out assembly, and the neutral end is connected with a neutral bar. The three-phase leading-out ends and the neutral ends are adjacently arranged in a staggered mode, current flowing-in and flowing-out paths are spatially separated, meanwhile, the neutral ends and the three-phase leading-out ends of adjacent layers form natural shielding layers, electromagnetic radiation generated by high-frequency harmonic waves is reduced, the three-phase leading-out ends are intensively arranged in the middle layer, excessive concentration of a high-current-density area is avoided, and the electromagnetic radiation is reduced. And the local temperature rise condition is reduced.

A linear motor conveyor system having a moving element comprising a first and a second magnetic element on opposite sides; a first track comprising a first linear motor configured to generate a dynamic magnetic field which acts on the first magnetic element to provide a first dynamic lateral force and a first dynamic longitudinal force; a second track with a transfer region positioned adjacent to the first track, the second track configured to generate a magnetic field that acts on the second magnetic element to provide a second lateral force; and a controller to control the first linear motor such that the first dynamic lateral force is configured to bias the moving element toward the first linear motor until the moving element reaches a switch point in the transfer region, after which the dynamic lateral forces are selectively adjusted to bias the moving element toward the first or second track.