5627results 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

A centrifugal blood pump without a mechanical bearing comprises a pump casing (1), an impeller (9) arranged in the pump casing rotatably about the central axis and freely movable axially and radially within a limited clearance. The impeller has per-manent magnets or permanently magnetized magnetic regions (N / S) which cooperate with an electromagnetic drive to set the impeller rotating. A circular wall (12) or circularly arranged wall sections are provided within the pump casing, their inner surfaces defining a radial clearance together with the outer circumference of the impeller to form a hydrodynamic radial bearing for the impeller.

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

An intravascular blood pump comprises a pump casing having a blood flow inlet and a blood flow outlet, and an impeller arranged in said pump casing so as to be rotatable about an axis of rotation, wherein the impeller has blades sized and shaped for conveying blood from the blood flow inlet to the blood flow outlet. The blood pump further comprises a drive unit for rotating the impeller, the drive unit comprising a plurality of posts arranged about the axis of rotation, wherein each of the posts includes a shaft portion and a head portion. Coil windings around the posts are sequentially controllable so as to create a rotating magnetic field. The drive unit further comprises a back plate which engages ends of the shaft portions of the posts opposite the head portions.

An electric machine includes a housing, a stator positioned in the housing and including a stator winding, and a rotor positioned in the housing configured to rotate about a machine axis and electromagnetically interactive with the stator across an air gap between the rotor and the stator. The rotor includes a rotor core, a plurality of permanent magnets located at the rotor core, and a rotor sleeve enclosing the rotor core and the plurality of permanent magnets. The stator is cooled via a flow of cooling oil, and the rotor is cooled via a flow of cooling air directed through the air gap between the rotor sleeve and the stator.

A substrate transfer apparatus for transferring a substrate is disclosed. The apparatus comprises: a transfer unit including a substrate holder configured to hold a substrate, and a base having therein a magnet and configured to move the substrate holder; a planar motor including a main body, a plurality of electromagnetic coils disposed in the main body, and a linear driver configured to supply a current to the electromagnetic coils, and magnetically levitate and linearly drive the base; a substrate detection sensor configured to detect the substrate when the substrate held by the substrate holder passes by; and a transfer controller configured to calculate an actual position of the substrate held by the substrate holder based on detection data of the substrate detection sensor, calculate correction values for a logical position that has been set, and correct a transfer position of the substrate based on the correction values.

The invention belongs to the technical field of joint motors, and particularly relates to a robot joint motor assembly and a motor. The robot joint motor assembly comprises a protective shell and a hollow shaft, a rotor assembly and a stator are arranged in the protective shell, an output flange is fixedly connected to one end of the hollow shaft, a clamping spring is arranged at one end of the hollow shaft, and a fixing plate is fixedly connected to the side, away from the output flange, of the protective shell; and a heat removal assembly and a protection assembly are arranged in the protection shell. According to the robot joint motor assembly, through cooperative use of the rotor assembly, the Z-shaped part and the first rotating wheel, when the robot joint motor assembly is used, the blades can rotate around the central axis of the hollow shaft, airflow flowing in the protective shell is accelerated, heat dissipation of heat in the protective shell is accelerated, and meanwhile in the rotating process of the frame body, the blades can rotate around the central axis of the hollow shaft; the original positions and angles of the blades are correspondingly changed, the guiding effect of the blades on airflow is optimized, and the heat dissipation effect of heat in the protective shell is improved.

A system can include an axial field rotary energy device with an axis of rotation and a rotor coaxial with the axis and having a shaft, bearings, rotor disks that are coaxial and permanent magnets on each rotor disk. A printed circuit board (PCB) stator is located between the rotor disks to define an air gap on each side of the PCB stator. An enclosure has two enclosure sections with an inspection port. Bearing caps and bearings are mounted to the rotor. A variable frequency drive (VFD) assembly is coupled to the axial field rotary energy device. The VFD has a flexible conduit that extends between the VFD housing and the axial field rotary energy device. The flexible conduit can adapt to different sizes of axial field rotary energy devices.

A system has an axial field rotary energy device with an axis, a printed circuit board (PCB) stator and a rotor with a rotor shaft and rotor disks having respective permanent magnets (PM). The rotor rotates about the axis relative to the PCB stator. A variable frequency drive (VFD) has VFD components coupled to the axial field rotary energy device. A device enclosure contains the axial field rotary energy device. A VFD enclosure contains the VFD, and the device and VFD enclosures are axially aligned and coupled to each other. A cooling system is integrated within the device and VFD enclosures and cools the axial field rotary energy device and the VFD. The cooling system has a cooling fan located axially outboard of the device and VFD enclosures. The cooling fan circulates an air flow radially and axially relative to the device and VFD enclosures.

A cleaner including a suction head; a main body; and a motor to form a suction airflow from the suction head to the main body. The motor includes a stator; a rotor; and an impeller coupled to the rotor and configured to generate an airflow by being rotated. The motor includes a housing that includes a base portion including a receiving space provided to accommodate the rotor and the stator; and a cover portion including a through-hole through which the rotor passes, the cover portion provided to cover the impeller. The base portion includes a bearing hole formed in an upper portion of the base portion to install a bearing provided to support the rotor; and a stator insertion hole formed to be open on a lateral side of the base portion to allow the stator to be inserted into the receiving space.

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.

A coolant supply system for an electric vehicle axle drive with an electric machine, in the electric machine housing of which a stator interacts with a rotor which is spaced from the stator via an air gap, and the interior of the electric machine is supplied with coolant for internal rotor cooling and / or for stator cooling. The coolant supply system has a flow unit by which an air flow can be generated which flows through the air gap in the axial direction, whereby the air gap is kept substantially free of coolant to reduce rotor drag losses.

To provide a rotor capable of suppressing deformation of a bridge part and a manufacturing method of the rotor.SOLUTION: A rotor 10 has a rotor core 11, a magnet 30 accommodated in a magnet housing hole 20, and resin material 40 fixing the magnet 30 with respect to the rotor core 11. The rotor core 11 has a peripheral part 13, an inner peripheral part 14, and a bridge part 15 positioned between two adjacent magnet housing holes 20 in a circumferential direction of the rotor core 11 and connecting the peripheral part 13 and the inner peripheral part 14. An inner surface of the magnet housing hole 20 includes a first surface 21 composing the peripheral part 13 and a second surface 22 composing the inner peripheral part 14. Inside the magnet housing hole 20, a projection 24 is provided blocking a space between the second surface 22 and a second outer surface 32 of the magnet 30 from both sides in an orthogonal direction. The first surface 21 contacts a first outer surface 31 of the magnet 30. The resin material 40 is filled in a part of both sides in the orthogonal direction of the magnet 30 in the magnet housing hole 20.SELECTED DRAWING: Figure 3

A power tool is provided including a housing having a grip portion with a grip circumference of smaller than or equal to approximately 120 mm; and a brushless direct-current (BLDC) motor at least partially disposed within the grip portion of the housing and configured to output a maximum power output of at least 450 watts. The motor includes a stator including a stator core and stator windings; and a rotor rotatably received within the stator and including a rotor shaft extending along a longitudinal axis and a series of permanent magnet rings mounted sequentially along the longitudinal axis and surrounding the rotor shaft, each permanent magnet including a plurality of magnetic poles.

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 discloses a torque system and suspension system decoupling method of a single-winding magnetic suspension permanent magnet synchronous motor, the motor adopts a suspension parallel single-winding structure, the torque system decouples suspension current, permanent magnets adopt consequent poles, and the suspension system decouples a rotor position angle; aiming at a current loop of the suspension system, regarding a coupling item of a torque system to the suspension system as disturbance, designing a sliding mode disturbance observer based on an improved superhelix algorithm, observing and compensating the disturbance, and realizing decoupling of the suspension system and torque control; aiming at the displacement / suspension force ring of the suspension system, designing a sliding-mode active-disturbance-rejection controller, observing the disturbance of the rotor displacement and compensating the suspension force to realize decoupling among different suspension degrees of freedom; the residual coupling factors of the torque system are regarded as system disturbance, and the disturbance is observed and compensated in real time by using a sliding mode-active disturbance rejection composite control method, so that decoupling of the residual coupling factors is realized. According to the invention, comprehensive decoupling of the torque system and the suspension system is realized.

The invention discloses a Halbach array type permanent magnet auxiliary synchronous reluctance motor rotor structure, and relates to the technical field of motor rotors. The rotor structure comprises three layers of magnetic barrier structures. The three-layer magnetic barrier structure comprises a first-layer U-shaped structure, a second-layer U-shaped structure and a third-layer double-J-shaped structure; wherein each layer of structure comprises Halbach array segments formed by permanent magnets and air slots which are arranged at intervals, and the included angle between every two adjacent permanent magnets in each layer is a fixed angle. Through the design of the three-layer magnetic barrier structure, each layer of permanent magnet is divided into a plurality of sections, and the magnetizing direction of the permanent magnet is changed by adjusting the included angle between each section of permanent magnet, so that a Halbach array structure is formed, and the torque ripple is reduced.

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 discloses a magnetic pole optimization method for reducing torque ripple of a permanent magnet synchronous motor. The magnetic pole optimization method comprises the following steps: step 1, analyzing a stator magnetomotive force and a stepped permanent magnet excitation magnetic potential during load operation by using an analytical method; step 2, obtaining air gap flux density harmonic amplitudes and orders respectively generated by the armature magnetic potential and the permanent magnet excitation magnetic potential; 3, solving a resultant magnetic field under the combined action of the permanent magnet and the armature magnetic potential, calculating the total output torque during load operation, and obtaining the relation between the working harmonic wave and the average output torque and the torque pulsation; and 4, based on the relationship between the working harmonic waves of the magnetic field and the output torque, the air gap flux density amplitude of the order related to the average torque is kept unchanged by adjusting the parameters of the stepped magnetic poles, and the air gap flux density amplitude of the order related to the torque pulsation is reduced. The motor obtained through the method can output the expected average torque, meanwhile, the torque pulsation is reduced, and the better torque performance is achieved; and good economic benefits can be generated.

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.

To provide a rotor that prevents a damage of a sleeve of an outer diameter side for preventing a permanent magnet form peeling.SOLUTION: A rotor for a rotary electric machine of the present invention comprises: a cylindrical sleeve; a plurality of permanent magnets arranged in a peripheral direction while being adhered to an inner peripheral surface of the cylindrical sleeve; and a shaft arranged to an inner diameter side of each permanent magnet. Then, each permanent magnet includes a flat surface in the inner diameter side in a view of a shaft direction, and an outer diameter side is a fan shape along the inner peripheral surface of the cylindrical sleeve, and the shaft is a regular polygon where the number of permanent magnets and angles are the same when viewed in the shaft direction, and a flat surface of the inner diameter side of each permanent magnet and a side surface of the shaft are oppositely arranged. A spacer is provided between each permanent magnet and the shaft is provided, and a damage of the sleeve on the outer diameter side is prevented.SELECTED DRAWING: Figure 4

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.