3739results about "Magnetic circuit" patented technology

To provide a technique for suppressing influences caused by the presence of a space communicating in a radial direction in a protruding portion, which protrudes from a stator core, in a stator coil.SOLUTION: A compressor 100 comprises a compression mechanism part 120 and a motor 200 which are stored in a sealed container 110. A stator 300 of the motor 200 includes a stator coil 340 wound around a plurality of teeth of a stator core 310. The stator coil 340 includes a first protruding portion 340A and a second protruding portion 340B protruding from the stator core 310 to a first side and a second side in an axial direction. At least outside of the first protruding portion 340A, a first enclosure wall 350 is provided which extends without a gap in the axial direction and a circumferential direction.SELECTED DRAWING: Figure 1

To provide a rotary electric machine which can improve the density of magnetic fluxes in a torque generation place while suppressing the induction voltage when the rotor is making rapid rotations.SOLUTION: The rotary electric machine includes: a stator having a plurality of stator teeth provided at predetermined intervals in a circumferential direction and projecting radially inward; and a rotor provided radially inside the stator. A plurality of grooves are formed on the outer peripheral surface of the rotor. The number of the grooves corresponds to the number of the stator teeth that generate magnetic force for attracting the rotor.SELECTED DRAWING: Figure 1

The invention provides an axial magnetic field modulation type magnetic gear applying a T-shaped modulation ring structure, which belongs to the field of motors and comprises a high-speed permanent magnet rotor, a low-speed permanent magnet rotor and a T-shaped modulation ring. The modulation ring comprises a plurality of T-shaped magnetic modulation pole pieces and T-shaped non-magnetic composite material pole pieces which are alternately arranged and bonded in the circumferential direction. The high-speed permanent magnet rotor and the low-speed permanent magnet rotor each comprise a rotor iron core composed of a plurality of rotor yokes, and N-pole permanent magnets and S-pole permanent magnets embedded between the adjacent rotor yokes in the circumferential direction. The high-speed permanent magnet rotor and the low-speed permanent magnet rotor coaxially sleeve the modulation ring on the two sides of the modulation ring respectively, and form radial and axial air gaps with the modulation ring. Leakage flux at the inner peripheral ends of the rotor yokes of the high-speed and low-speed permanent magnet rotors can enter the T-shaped modulation rings to be linked with magnetic flux generated by the corresponding rotor permanent magnets, the leakage flux at the inner peripheral ends of the rotor yokes on the two sides is reduced, the high-speed and low-speed rotors coaxially rotate, the air gap flux density can be increased, and therefore the gear output torque and the torque density are improved; meanwhile, the modulation ring is easy to process and compact in structure.

The present invention discloses a rotor, a motor and a vehicle, comprising: a rotor core, the rotor core surrounds a center hole, the rotor core is provided with a first mounting slot group and a first connecting structure, the first mounting slot group includes a first mounting slot and a second mounting slot; a first permanent magnet group, the first permanent magnet group includes a first permanent magnet and a second permanent magnet, the first permanent magnet is installed in the first mounting slot, and the second permanent magnet is installed in the second mounting slot; a center block, the center block is assembled in the center hole, the center block is provided with a second connecting structure and a rotating shaft hole, the second connecting structure is a non-magnetic conductive part and cooperates with the first connecting structure, and the second connecting structure extends between the first permanent magnet and the second permanent magnet to separate the first permanent magnet and the second permanent magnet; a rotating shaft, the rotating shaft cooperates with the rotating shaft hole and rotates synchronously with the center block and the rotor core. The rotor according to the present invention can avoid rotor magnetic leakage, and has the advantages of good magnetic isolation effect and high structural strength.

An electric propulsion system for a vertical take-off and landing (VTOL) aircraft having a heat exchanger to cool fluids used in an electrical engine, the electric propulsion system comprising at least one electrical engine mechanically connected directly or indirectly to a fuselage of the VTOL aircraft and electrically connected to an electrical power source. The electrical engine may comprise an electrical motor having a stator and a rotor; a gearbox assembly comprising a sun gear; at least one planetary gear; a ring gear; and a planetary carrier. The electric engine may include an inverter assembly comprising a thermal plate and an inverter assembly housing; an end bell assembly that is connected to the thermal plate of the inverter assembly; and a heat exchanger comprising an array of cooling fins and tubes.

The invention relates to a double-layer permanent magnet radial field modulation type magnetic gear and a new energy automobile hub motor, the magnetic gear comprises a high-speed rotor, a magnetic regulation stator and a low-speed rotor, the high-speed rotor is composed of a high-speed rotor iron yoke and high-speed rotor permanent magnets, and the low-speed rotor is composed of a low-speed rotor inner layer permanent magnet, a low-speed rotor outer layer permanent magnet and a low-speed rotor iron yoke; the high-speed rotor iron yoke, the high-speed rotor permanent magnet, the flux-adjustable stator, the low-speed rotor inner-layer permanent magnet, the low-speed rotor outer-layer permanent magnet and the low-speed rotor iron yoke are coaxially nested in sequence from inside to outside; the high-speed rotor permanent magnet is composed of a plurality of permanent magnet modules of umbrella-shaped tooth structures, the low-speed rotor inner-layer permanent magnet is magnetized in a Halbach arrangement mode, the low-speed rotor outer-layer permanent magnet is magnetized in the radial direction, and the high-speed rotor permanent magnet is magnetized in a Halbach arrangement mode of umbrella-shaped teeth. The torque transmission capacity of the magnetic gear can be improved, the magnetic saturation phenomenon is restrained, the magnetic field modulation effect is enhanced, and the torque density of the magnetic gear is improved.

The invention relates to the technical field of permanent magnet motors, in particular to a salient pole rate reversible degree enhanced permanent magnet motor and a design method thereof. The salient pole rate reversible degree enhanced permanent magnet motor comprises a rotating shaft, a rotor sleeving the rotating shaft, and a stator coaxially sleeving the rotor; eight trapezoidal magnetic barriers with centers on a q axis and eight bread-type permanent magnets with centers on a d axis are embedded in the rotor along the circumferential direction in a staggered manner; the bread-type permanent magnets are magnetized along the inner and outer thickness directions, and the magnetizing directions are opposite; and two sides of each bread-shaped permanent magnet are respectively provided with a bulb-shaped magnetic barrier contacted with the bread-shaped permanent magnet. According to the invention, a plurality of variable magnetic resistances instead of a single magnetic resistance can be innovatively introduced into the rotor by ingeniously changing the armature current under different working conditions, so that the leakage magnetic flux and the effective magnetic flux of the motor are changed, meanwhile, the target of enhancing the reversible degree of the salient pole rate under all working conditions is achieved, and the diversified performance requirements under different working conditions can be met.

The invention relates to an axial modular combined magnetic flux switching type linear rotating motor, which comprises a rotor assembly and a stator assembly, the stator assembly comprises a plurality of groups of stator units arranged circumferentially, and each stator unit comprises a plurality of stator modules, tooth-shaped permanent magnets connected among the stator modules and armature windings wound on the stator modules. The rotor assembly comprises a plurality of rotor modules, a plurality of rows of rotor teeth are arranged on the outer circumference of each rotor module, and the rotor teeth in the adjacent rows are distributed in a staggered mode. According to the invention, the mechanical dynamic performance is optimized while the energy conversion efficiency is maintained, the innovative stator system adopts a distributed module architecture, the fault-tolerant capability of the system is effectively improved through redundancy design, the modular construction not only simplifies the production process, but also is more beneficial to large-scale manufacturing, the mover part adopts a full-magnetic-conductive material topology, and the energy conversion efficiency is improved. The mechanical strength is ensured, meanwhile, light weight of moving parts is achieved, and the stability requirement under the high-speed operation working condition is met.

The invention belongs to the technical field of speed reducers, and particularly relates to a multi-point meshing compound planetary gear speed reducer, a driving wheel set and a robot driving module. Wherein the multi-point meshing compound planetary gear reducer is provided with a sun gear serving as power input; the duplex planet gears are uniformly distributed around the sun gear, the duplex planet gears are composed of first planet gears and second planet gears, and the sun gear is meshed with the first planet gears; an intermediate planet gear exists between any two adjacent second planet gears in the circumferential direction, and each intermediate planet gear is meshed with the two adjacent second planet gears at the same time; an inner gear ring is arranged on a machine shell of the speed reducer, and the inner gear ring is meshed with the intermediate planet wheel. An existing planetary reducer has defects in the torque transmission capacity and the bearing capacity, a combined structure of a duplex planet wheel and an intermediate planet wheel is adopted, the intermediate planet wheel forms a multi-point meshing relation in the transmission process, loads are evenly dispersed, and the torque transmission capacity and the bearing capacity of the reducer are improved.

The invention provides a multi-magnetic-circuit single-magnetic-ring dual-modulation three-rotor coaxial magnetic gear and an automobile hub motor, the magnetic gear comprises an inner rotor, a T-shaped dual-modulation magnetic ring, an intermediate rotor and an outer rotor, the inner rotor, the T-shaped dual-modulation magnetic ring and the intermediate rotor are nested in sequence and are coaxially configured to form a radial and modulation coaxial magnetic gear structure; the middle rotor, the T-shaped dual-modulation magnetic modulation ring and the outer rotor are sequentially nested and coaxially arranged to form an axial and modulation coaxial magnetic gear structure; and sum modulation is adopted between the inner rotor and the intermediate rotor, sum modulation is adopted between the intermediate rotor and the outer rotor, and the two sum modulation and sum modulation share one T-shaped dual-modulation magnetic modulation ring, so that the monotonic magnetic ring dual-modulation effect is realized. The size of the magnetic gear can be reduced, the torque transmission capacity of the magnetic gear is improved, the magnetic saturation phenomenon is restrained, the magnetic field modulation effect is enhanced, and the torque density of the magnetic gear is improved.

An electric motor system, such as for an electrified vehicle, includes a permanent magnet motor (PMM) including a hollow cylindrical stator defining a circular inner portion with a plurality of slots, defined between a respective plurality of ferromagnetic teeth, and having a plurality of electromagnetic coils arranged in the plurality of slots, respectively, and a cylindrical rotor disposed within the stator and defining a circular outer portion having N pairs of permanent magnets arranged thereabout to define N rotor poles, respectively, wherein at least one pair of the N pairs of permanent magnets is asymmetrically staggered or offset relative a symmetric N pole positioning, and wherein N is an even integer greater than or equal to four, and a controller configured to control the PMM to mitigate or eliminate magnetic cogging.

A dynamo-electric rotary machine includes a rotor defining an axis, a stator, and a can designed for arrangement in an air gap between the rotor and the stator in order to seal the stator and the rotor in relation to each other. The can has at least one section of average electrical conductivity in a range from 1 S / m to 10000 S / m in an axial and / or a tangential direction. The can is electrically conductively incorporated in an earthing system of the dynamo-electric machine.

An electric motor having a stator and a rotor in which the electric motor is an axial flux motor. The stator has a multiplicity of cores which, along a circumferential direction, are disposed beside on another on a common first diameter and are in each case surrounded by one coil. The rotor has a multiplicity of magnets which, along the circumferential direction, are disposed beside one another on a common second diameter on a support. Each magnet in the circumferential direction extends across a first angular range and the magnets are disposed so as to be mutually spaced apart by a second angular range formed by the support, which support is also heatable by the stator by induction. The second angular range is at least 30% of the first angular range.

The present disclosure provides a sealing device and an in-wheel motor including the sealing device. The in-wheel motor includes a stator, a rotor rotatably disposed with respect to the stator, an annular inner seal connected to the stator and spaced apart from the rotor by a predetermined gap so as to be disposed between the stator and the rotor, and an annular slinger coupled to an end portion of the rotor, wherein the annular inner seal seals between the slinger and the in-wheel motor.

A substrate for an image sensor according to an embodiment includes an insulating layer; and a conductive pattern portion disposed on the insulating layer, wherein the insulating layer comprises: a first insulating part; and a second insulating part surrounding the first insulating part and spaced apart from the first insulating part with an open region therebetween, wherein the conductive pattern portion comprises a first lead pattern part disposed on the first insulating part; a second lead pattern part disposed on the second insulating part; and an extension pattern part disposed on the open region of the insulating layer to connect the first lead pattern part with the second lead pattern part and including a bent portion.

The invention discloses a mechanical weak magnetic speed regulation permanent magnet motor, and belongs to the technical field of permanent magnet motors, the mechanical weak magnetic speed regulation permanent magnet motor comprises a motor body, two sides of the motor body are respectively provided with an exhaust hole group and an air inlet hole group, the interior of the motor body is rotatably connected with a rotating shaft, and the inner side wall of the motor body is symmetrically provided with stator discs; the surface of the rotating shaft is slidably connected with two symmetrically-designed permanent magnet rotors through sliding rails, and a plurality of coil assemblies are annularly designed on the side, close to the permanent magnet rotors, of the stator disc. According to the invention, when the rotating speed of the motor body is increased, the internal pressure change of the sealing cavity is controlled through the rotating speed change of the rotating shaft and the centrifugal force change of the sealing piston block and the balancing weight, so that the gap between the magnet and the coil assembly is hydraulically adjusted, no extra energy is needed, and the energy-saving effect is realized; and automatic field weakening control can be carried out according to the real-time rotating speed, so that the stability and the safety of the operation of the motor body are effectively ensured.

Provided is a water pump using an axial gap-type electric motor employing a rare-earth-free magnet. The water pump (EWP) includes: a pump housing having a space in a sealing state on one side thereof, in which, on the other side thereof, an inlet through which a fluid is introduced and an outlet through which the introduced fluid is discharged are connected through a fluid flow passage; a rotor rotatably supported on the fluid flow passage; an impeller integrally formed with the rotor on the upper side of the rotor; a stator arranged in the lower space to generate a rotating magnetic field to rotatably drive the rotor; and a waterproof partition wall arranged inside the pump housing to separate the rotor from the stator.

The invention discloses a slotless permanent magnet motor based on a Halbach array, and belongs to the technical field of motor design and manufacturing. A rotor of the slotless permanent magnet motor is coaxially arranged in a stator, the stator comprises a stator iron core and a stator winding, the rotor comprises a permanent magnet and a rotor iron core, the permanent magnet is fixed on the outer wall of the rotor iron core and adopts a two-section Halbach array, the permanent magnet is composed of an auxiliary magnetic pole and a main magnetic pole, and an air gap is arranged between the stator iron core and the rotor. The stator winding is suspended in the air gap; during parallel magnetization, the magnetization directions of the permanent magnets of the Halbach array are along the tangential direction of the rotor, the magnetic pole directions are the same, and the main magnetic poles and the auxiliary magnetic poles both adopt a parallel magnetization mode; during radial magnetizing, the magnetizing direction of the permanent magnets of the Halbach array is in the radius direction of the rotor, the polarities of the adjacent permanent magnets are alternately arranged, the main magnetic poles adopt a radial magnetizing mode, and the auxiliary magnetic poles adopt a tangential magnetizing mode. According to the slotless permanent magnet motor, through directional magnetic field superposition of segmented magnetic poles, reverse magnetic leakage is reduced, air gap flux density is improved, and copper loss and iron loss are reduced.

An electric propulsion system for a vertical take-off and landing (VTOL) aircraft having a heat exchanger to cool fluids used in an electrical engine, the electric propulsion system comprising at least one electrical engine mechanically connected directly or indirectly to a fuselage of the VTOL aircraft and electrically connected to an electrical power source. The electrical engine may comprise an electrical motor having a stator and a rotor; a gearbox assembly comprising a sun gear; at least one planetary gear; a ring gear; and a planetary carrier. The electric engine may include an inverter assembly comprising a thermal plate and an inverter assembly housing; an end bell assembly that is connected to the thermal plate of the inverter assembly; and a heat exchanger comprising an array of cooling fins and tubes.

To allow a rotor part with a permanent magnet to have a similar characteristic to a rotor part without a permanent magnet and make at least three different characteristics freely switchable.SOLUTION: A first rotor part 111 includes: a high magnetic rotor part 111A in which a permanent magnet 111c has a relatively strong magnetic force; and a low magnetic rotor part 111B in which a permanent magnet 111d has a relatively weak magnetic force. The first rotor part further includes a switch operation unit 210 for switching a rotor 110 to a position in which the outer peripheral surface of the high magnetic rotor part 111A faces the inner peripheral surface of a stator 100, a position in which the outer peripheral surface of the low magnetic rotor part 111A faces the inner peripheral surface of the stator 100, or a position in which the outer peripheral surface of a second rotor part 112 faces the inner peripheral surface of the stator 100.SELECTED DRAWING: Figure 7

The invention provides an axial magnetic flux generator, a range extender and a power generation system, and relates to the technical field of generators, the axial magnetic flux generator provided by the invention adopts an asymmetric double-rotor structure, the radius of a first rotor disc is greater than that of a second rotor disc, and the first rotor disc and the second rotor disc are respectively matched with a first winding and a second winding with corresponding sizes and are arranged at two sides of a stator assembly. The rotating shaft drives the two rotors to rotate at the same time, multi-stage power output is achieved, and the output power of the first winding is larger than that of the second winding. Different power output channels can be matched according to different power generation working conditions, high heat efficiency intervals of the engine under different torque outputs can be effectively adapted, and therefore the power generation efficiency and the energy utilization rate of the generator are improved.

The invention provides a permanent magnet synchronous driving assembly with a speed change function. The permanent magnet synchronous driving assembly comprises a hybrid excitation motor, a speed reducer, a dual-channel inverter, a controller and a sensing network, the hybrid excitation motor comprises a stator and a rotor which are provided with fractional slot windings, the rotor is sequentially provided with a permanent magnet array, an isolation layer and an excitation winding array which are sequentially distributed in the axial direction of the rotor from the axis to the outside, the permanent magnet array is formed by splicing a plurality of fan-shaped magnetic steel, and N poles and S poles are alternately arranged to form main magnetic field pole pairs; the number of excitation windings of the excitation winding array is half of that of the magnetic steel, each winding is embedded between adjacent pole pairs, and the axes of the excitation windings and the axes of the magnetic poles of the permanent magnets are deviated by a certain angle to form a space phase difference; a permanent magnet magnetic circuit formed by the permanent magnet array and the stator and an electric excitation magnetic circuit formed by the excitation winding array and the stator are subjected to vector superposition at an air gap; the dual-channel inverter comprises a main power channel and an excitation channel.

The invention provides a high-stability axial magnetic flux motor, which comprises a rear end cover, a front end cover, two stator cores, a rotor disc, an output shaft and a support frame, and is characterized in that the output shaft is coaxially and rotatably connected to the interior of the rear end cover and the interior of the front end cover through two bearings; the two stator iron cores are symmetrically installed in the front end cover and the rear end cover. The working temperature of the motor is monitored, when the internal temperature of the axial flux motor reaches the rated temperature, the motor control system controls the electromagnet to be powered off, at the moment, the rotating seat drives the flow guide fan to rotate, and a negative pressure area is formed outside the through hole in the rotating process of the flow guide fan, so that external air can flow into the air inlet channel; and air inside and outside the motor is exchanged, so that heat dissipation of the axial magnetic flux motor is realized, heat accumulation between the stator and the rotor is avoided, and the overall operation stability of the motor is improved.

The present invention discloses a multi-pole and few-slot unitized permanent magnet hub motor and a coordinated control system and method. The motor is composed of N identical motor units uniformly distributed in the circumferential direction of a radial section, each 1 / N outer rotor is divided into M identical rotor segments along the axial direction, and the M rotor segments are rotated in sequence along the same rotation direction by a mechanical staggered angle arrangement; the constant torque area is divided into a first area and a second area, and the constant power area is divided into a third area to an eighth area. The control system includes two control modules, each of which is composed of a power electronic switch, a DSP controller and an inverter connected in series in sequence, the input ends of the two power electronic switches are respectively connected to the output ends of a battery, the output end of each inverter is respectively connected to N / 2 winding electronic switches, one winding electronic switch controls the on and off of a centralized winding in a motor unit, and the mutually independent winding electronic switches realize independent control of the motor unit, thereby improving the motor control freedom and operation efficiency.

The invention discloses a modular five-degree-of-freedom magnetic suspension compressor rotor system and a control method, and belongs to the field of compressor rotors, the modular five-degree-of-freedom magnetic suspension compressor rotor system comprises a magnetic suspension rotor main shaft and a driving motor arranged in the middle of the magnetic suspension rotor main shaft, and a centrifugal impeller and a cooling impeller are installed at the two ends of the magnetic suspension rotor main shaft correspondingly; the magnetic suspension rotor main shaft between the driving motor and the centrifugal impeller and the magnetic suspension rotor main shaft between the driving motor and the cooling impeller are respectively and sequentially provided with an axial magnetic bearing assembly and a radial magnetic bearing assembly; the axial magnetic bearing assembly is of a non-thrust disc structure in which a magnetic field is directly coupled; the radial magnetic bearing assembly is of a modular structure with partitioned magnetic poles. According to the modularized five-degree-of-freedom magnetic suspension compressor rotor system and the control method, the axial magnetic bearing assembly directly coupled with the magnetic field is adopted, a thrust disc is omitted, the assembly process of the axial magnetic bearing is simplified, meanwhile, the partitioned magnetic poles are adopted, redundancy control is achieved, and stability is higher.

A method for controlling a planar drive system with a stator unit and a rotor includes moving the rotor to a rotational position on the stator unit. In the rotational position, each magnet unit of the rotor covers a coil group of the stator unit which is not covered by any other magnet unit of the rotor, in each orientation of the rotor relative to the stator unit. The method includes actuating the coil groups which are covered by the magnet units of the rotor in the rotational position, generating a stator magnetic field by each actuated coil group, and rotating the rotor about an axis oriented perpendicular to a surface of the stator unit by a predetermined angle, by way of the stator magnetic fields of the actuated coil groups covered by the magnet units of the rotor. A planar drive system is adapted to perform the method.

The present invention relates to a five-degree-of-freedom ultra-high-speed bearingless permanent magnet motor. Both ends of a cylindrical solid permanent magnet are respectively connected to a rotating shaft. A casing is installed outside the cylindrical solid permanent magnet. A stator core is fixedly installed on the casing. A set of torque windings is embedded in the bottom layer of the stator core, and two sets of suspension windings are embedded in the upper layer of the stator core. End covers are fixedly installed on both sides of the casing. Auxiliary bearings are installed between the end covers and the rotating shaft. Passive permanent magnet bearings are nested on both the end covers and the rotating shaft. The present invention is reasonably designed, integrating a magnetic suspension bearing and a permanent magnet motor into one. While the motor generates an electromagnetic torque capable of driving the rotor to rotate, it can also generate a radial suspension force to overcome the rotor gravity and unilateral magnetic pull force, simplifying the motor structure and shortening the axial length of the motor. The double suspension windings and the axial passive permanent magnet magnetic bearing achieve five-degree-of-freedom control, increasing the rotor stiffness and critical speed of the ultra-high-speed motor, and improving the operation stability and anti-disturbance ability.

A direct drive motor includes: a support shaft; the coil winding is wound on the iron core; the inner rotor assembly is located on the radial outer side of the supporting shaft; the outer rotor assembly is located on the radial outer side of the inner rotor assembly; the magnetism adjusting assembly is provided with a plurality of magnetism adjusting blocks, is located between the inner rotor assembly and the outer rotor assembly in the radial direction and is fixed relative to the supporting shaft, a gap exists between the magnetism adjusting assembly and the inner rotor assembly, and a gap exists between the magnetism adjusting assembly and the outer rotor assembly; the output shaft extends along the axis and is detachably fixed to the outer rotor assembly; the direct-drive motor further comprises a barrel-shaped fixing frame, the peripheral side wall of the fixing frame is provided with a containing groove, the containing groove extends in the direction parallel to the axis, the magnetism adjusting block is located in the containing groove, and the axial end of the fixing frame forms a shell of the second axial end of the direct-drive motor.

The invention discloses a shaftless disc type turbine self-powered flow monitoring device. The device comprises a static assembly, a rotating assembly, a bearing and a data collection module which are coaxially arranged. Magnetic induction coils are distributed in the shell in the circumferential direction; the shell end cover is provided with a guide vane; the turbine comprises shaftless fluid power blades and permanent magnets which are uniformly distributed in the circumferential direction, the magnet yoke is rigidly connected with the impeller assembly, and the permanent magnets are arranged in a Halbach array; the dynamic sealing interface adopts a three-stage labyrinth sealing structure; the blade has an NACA airfoil section; the magnetic induction coil is of a three-layer close winding structure. Self-power-generation is achieved through the electromagnetic induction principle, an external power source is not needed, and cost is reduced; the shaftless design reduces mechanical faults, improves the reliability and prolongs the service life; the data processing module can realize high-precision measurement; a three-stage labyrinth sealing structure prevents fluid leakage; the optimized blade parameters adapt to fluid flow; the design of the permanent magnet assembly and the magnetic induction coil enhances the magnetic field and improves the power generation efficiency and the anti-interference capability.