389results 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).

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.

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.

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 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 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.

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.

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.

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).

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 coaxial double-rotor column type motor disclosed by the present invention comprises a motor shell and a rotating shaft, the rotating shaft is rotatably arranged in the motor shell, two coaxial motor stators are fixed in the motor shell side by side, and a coaxial motor rotor is configured in the middle of each motor stator. The two motor rotors are fixedly arranged on the rotating shaft in a sleeving mode, and the two motor rotors generate electromagnetic torque under the action of rotating magnetic fields generated by the two motor stators so as to jointly drive the rotating shaft to rotate. The double-motor structure composed of the double rotors and the double stators is adopted, the efficiency of the motor can be remarkably improved, under the same input power, the motor can output higher mechanical power, energy loss in the conversion process is effectively reduced, and then heat generated due to energy loss is greatly reduced.

There is provided a bearing comprising an inner race, an outer race and one or more roller elements positioned radially between the inner and outer races. The bearing further comprises a wireless power transfer system affixed to or integrally formed with the at least one of the races.

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).

A stage assembly for supporting and moving electronic components includes a guide rail. The stage assembly also includes a carrier for supporting an electronic component and moveable along a length of the guide rail. The stage assembly further includes a linear motor comprising a rotor and a stator assembly positioned along the length of the guide rail, the rotor operatively coupled to the carrier to actuate movement of the carrier along the length of the guide rail. The stage assembly yet further includes a flux shield formed of a ferromagnetic material and positioned between the stator assembly and the carrier. The stage assembly also includes one or more magnetic preload assemblies operatively coupled to the carrier.

A linear transport device (1) comprises a transport path including a stator, a plurality of transport bodies moving along the transport path, a magnetizer (MA) installed on each of the transport bodies and generating a magnetic field to be used in position detection, a magnetic detection element (30) installed on the transport path and detecting the magnetic field, a computing device (40) calculating the position of each of the transport bodies based on the magnetic field detected by the magnetic detection element, and a correction value memory storing a correction value set which is a combination of correction values for correcting the position of each of the transport bodies.The magnetizer comprises a magnet (10A) in which magnetic poles of different polarities are alternately arranged along a moving direction of the transport bodies, and a magnetic shield (20A) which is a magnetic body and formed of a resin containing a magnetic material powder. The magnetic shield (20A) blocks magnetic lines of force emanating from the magnet by being provided on two end surfaces of the magnet and on an upper surface of the magnet in the moving direction, the upper surface being a surface opposite a counter surface facing the transport path. The number of correction value sets is smaller than the number of transport bodies. The computing device corrects the position of one of the transport bodies using one of the correction value sets commonly applicable to another of the transport bodies.

The invention provides a metal shielding sleeve for a shield pump, and belongs to the technical field of pumps. The problems that an existing shielding sleeve welding structure is high in leakage risk, large in machining difficulty and the like are solved. The metal shielding sleeve for the shield pump comprises an inner support made of metal and an integrally formed rotor shielding case, wherein the inner support and the rotor shielding case are enclosed to form a rotor cavity. The rotor shielding cover comprises a first transverse circular ring part, a first vertical circular ring part and a second transverse circular ring part which are in smooth connection, the first transverse circular ring part abuts against the outer peripheral surface of the inner support, a first fixing part at the upper end of the inner support is fixed to the first transverse circular ring part through elastic sealing, and the second transverse circular ring part is fixed to the lower end of the inner support through welding. By means of the integrally-formed structure, welding seams are reduced, upper-end elastic sealing and lower-end welding are combined, multiple elastic sealing pieces are matched, welding deviation and uneven stress are effectively compensated, sealing reliability is remarkably improved, and meanwhile electromagnetic performance stability and the manufacturing yield are guaranteed.

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.

The utility model discloses a shielding type underwater thruster stator, which belongs to the technical field of underwater thrusters and comprises a metal shell, metal flanges are respectively welded at two ends of the metal shell, connecting welding holes are formed in the middle parts of the two metal flanges, shielding sleeves are fixedly sleeved in the two connecting welding holes, and the shielding sleeves are connected with the metal flanges. And the middle part of the shielding sleeve penetrates through the inner cavity of the metal shell. According to the utility model, the metal shell, the metal flange and the shielding sleeve are connected through welding, and the stator winding and the stator coil are arranged in the space formed by welding and sealing the metal shell, the metal flange and the shielding sleeve, so that a pressure compensation device is omitted, a sealing ring is not needed for sealing, and pressure compensation liquid is not needed; the problem of pressure compensation liquid leakage does not exist, the underwater propeller is designed to be of a pressure bearing structure and can work underwater for a long time, and the operation safety of the underwater propeller is greatly improved.

The invention provides a power assembly and a vehicle with the power assembly, the power assembly comprises an integrated shell and a stator rotating mechanism, the integrated shell is internally provided with a containing cavity, the containing cavity is internally provided with a motor shaft, a first motor unit and a second motor unit, the first motor unit and the second motor unit are both arranged on the motor shaft, and the stator rotating mechanism is arranged in the containing cavity. The first motor unit and the second motor unit are arranged in the axial direction of the motor shaft in a spaced mode. The stator rotating mechanism is connected with a stator of the second motor unit, and the stator rotating mechanism is rotatably arranged relative to the side wall of the containing cavity so as to adjust the stator angle of the second motor unit. By designing the stator rotating mechanism, the circumferential angle of the stator of the second motor unit is adjusted, and noise and resonance of the motor are reduced.

An active magnetic bearing apparatus for supporting a rotor of a rotary machine comprises an axial magnetic bearing unit and a radial magnetic bearing unit mounted directly to one another. One of the axial magnetic bearing unit and the radial magnetic bearing unit is mounted to a support for attachment to a housing of the rotary machine.

An encoder according to an embodiment includes: a shaft; an annular magnet connected to the shaft; a housing accommodating at least a portion of the shaft and the annular magnet; and a shield member protruding from the housing in a first direction orthogonal to an axial direction of the shaft.

There is provided a bearing comprising an inner race, an outer race and one or more roller elements positioned radially between the inner and outer races. The bearing further comprises a wireless power transfer system affixed to or integrally formed with the at least one of the races.

The present invention relates to a dual-voltage power supply vehicle, comprising: a vehicle chassis, the vehicle chassis being provided with a carriage, the carriage being provided with a power output compartment; a heat dissipation mechanism being provided in the carriage for dissipating heat; a diesel generator set being provided in the carriage, the diesel generator set being used to provide a backup power supply, the diesel generator set comprising a diesel engine, a generator stator winding coil and a magnet rotor, the diesel engine driving the magnet rotor to rotate, the diesel generator set being able to output a first rated voltage, and after reducing the speed of change of the magnetic flux between the generator stator winding coil and the magnet rotor, the diesel generator set being able to output a second rated voltage, the second rated voltage being lower than the first rated voltage; a power switch cabinet being used to control the opening or closing of a gate between an output end of the diesel generator set and a load; and a cable winch being provided in the carriage for connecting an output cable of the power supply vehicle to a load.

The invention relates to the field of motors, and discloses a magnetic suspension doubly salient permanent magnet motor, which comprises a rotating assembly, and is characterized in that the rotating assembly comprises a rotor shaft and a stator part arranged at the outer side of the rotor shaft; the radial suspension assembly is arranged on the outer side of the rotor shaft; the axial suspension assembly is arranged on the outer side of the rotor shaft; the permanent magnet is located between the radial suspension assembly and the axial suspension assembly; the equipment combines the characteristics of a magnetic bearing and a doubly salient motor, due to the magnetic isolation effect of the permanent magnets, the armature magnetic field of the motor and the magnetic suspension bearing control magnetic field do not influence each other, independent control of torque and suspension force can be realized without adding a decoupling algorithm, the advantages of no mechanical wear, long service life and the like of the magnetic suspension bearing are exerted, and the magnetic suspension bearing is more stable in performance. And the purposes of low energy consumption and high efficiency of the doubly salient motor are achieved.