380results about "Synchronous machine details" patented technology

The invention relates to the technical field of permanent magnet synchronous motors, in particular to a method, device and equipment for reducing vibration noise of a permanent magnet synchronous motor, and the method comprises the steps: building an electromagnetic field model, extracting radial electromagnetic force data, carrying out the spectrum and modal analysis, recognizing a main noise source, generating an acoustic power level waterfall plot through the combination of acoustic simulation, and defining an optimization target. The optimal scheme is finally obtained by designing the shape of a rotor hole, adjusting multi-parameter collaborative optimization of stator slot width and air gap length and the like, and iteratively optimizing key variables by adopting an intelligent algorithm. According to the method, the space 0-order quadruplicated frequency noise and 24-order octupled frequency noise are remarkably reduced, the torque fluctuation is inhibited, the output performance is ensured, the method is suitable for large-scale production, and the NVH quality of the motor is effectively improved.

A structure of a rotor changeable of a magnetic force is provided, which includes a rotor core and a plurality of magnetic pole parts disposed therein. Each magnetic pole part includes a radially-magnetized fixed magnetic-force magnet and a circumferentially-magnetized variable magnetic-force magnet. A cavity part is disposed between the fixed magnetic-force magnet and the variable magnetic-force magnet. The cavity part has a cross-section extending from an end part of the fixed magnetic-force magnet toward an opposing surface. The cavity part is formed so that a distance between the variable magnetic-force magnet and the cavity part in the circumferential direction becomes larger as the cavity part approaches the opposing surface, and a width of the cavity part in the circumferential direction becomes smaller as the cavity part separates from the fixed magnetic-force magnet in the radial direction.

The invention provides a permanent magnet synchronous motor and a vehicle. The permanent magnet synchronous motor comprises a stator structure and a rotor structure, the rotor structure is sleeved with the stator structure, the stator structure comprises a stator iron core (1), the rotor structure comprises a rotor iron core (3), the stator iron core (1) comprises stator grooves (2), the stator grooves (2) comprise first stator grooves (21) and second stator grooves (22), and the first stator grooves (21) and the second stator grooves (22) are arranged in one pole. When the d-axis of the rotor structure coincides with the magnetic pole center line of the stator structure, the first stator grooves (21) are located on the two sides of the q-axis of the permanent magnet synchronous motor and are adjacent to the q-axis, the second stator grooves (22) are located between the two first stator grooves (21) on the two sides of the d-axis, the notch width of the first stator grooves (21) is B1, the notch width of the second stator grooves (22) is B0, and B1 is smaller than B0. According to the permanent magnet synchronous motor, the cogging torque of the motor and the torque pulsation of the motor can be reduced, the harmonic content of the motor is reduced, and the noise and vibration of the motor are reduced.

The application relates to the technical field of permanent magnet motors, and discloses a heat dissipation type permanent magnet motor which comprises a machine body, a cooling cover for heat dissipation of the permanent magnet motor is fixedly connected to the outside of the machine body, and a purification shell for processing flowing air is fixedly connected to the outside of the cooling cover. The heat generated by the machine body during operation can be directly conducted and dissipated to air through the heat conduction strip. The memory metal strip senses the emergency overheating of the machine body during operation, so that the bending plate moves to trigger the contact to complete the temperature sensing of the machine body. The pulp plate runs to guide the external air into the cooling channel inside the heat conduction strip to perform air cooling heat dissipation, so that the permanent magnet motor adopts the combination mode of the heat dissipation fin and the emergency air cooling heat dissipation, the heat dissipation effect of the permanent magnet motor is improved, the filter plate filters and removes dust in the flowing air, the screw rod moves to make the nozzle move to perform high-pressure air blowing on the dust filtered and gathered in the filter plate, and the air dust filtered by the air cooling heat dissipation of the permanent magnet motor is automatically cleaned.

This invention discloses an internal water channel cooling system for a low-speed, high-torque permanent magnet synchronous motor rotor. The system includes an internal water channel cooling device, a bearing, and a waterproofing device. The internal water channel cooling device is fixed to the inner wall of the rotor and rotates at the same speed as the rotor. The inner ring of the bearing is connected to the inlet end of the internal water channel cooling device, and the outer ring of the bearing is connected to the outlet end of the external water channel. Coolant flows from the external water channel along the gap in the middle of the inner ring of the bearing to the internal water channel cooling device. The connection between the water channels at both ends of the bearing is sealed off by the waterproofing device. This invention sets up internal water channels inside the motor and extends the flow path of the coolant within the channels using baffles, increasing the coolant flow distance and thus improving the cooling effect. This solves the problem of temperature rise in the permanent magnet part, which has the greatest impact on the performance of the permanent magnet synchronous motor, thereby improving the performance of the permanent magnet synchronous motor.

A rotor has at least one first rotor body with a first group of permanent magnets and a second rotor body with a second group of permanent magnets. The first and the second rotor bodies are rotated relative to each other about a common rotational axis against the effect of a first torsional stiffness by a mechanical field-attenuation mechanism. The field-attenuation mechanism includes a lever element. The first rotor body is coupled to a first lever section, and the second rotor body is coupled to a second lever section of the lever element. The first and second lever sections are arranged on opposite sides of the lever such that by tilting the lever element, the first and the second rotor bodies are rotated relative to each other in a targeted manner to produce a desired adjustment of the mechanical field-attenuation mechanism.

The invention discloses a rotor and a synchronous reluctance motor with the same. In the invention, the rotor has an even number of magnetic barrier structures, each magnetic barrier structure comprises a plurality of arc-shaped magnetic barrier layers, the plurality of arc-shaped magnetic barrier layers of each magnetic barrier structure have the same symmetry axis, each arc-shaped magnetic barrier layer comprises five sections of magnetic barriers, two sections of outermost magnetic barriers are mutually symmetrical about the symmetry axis, and two sections of middle magnetic barriers are mutually symmetrical about the symmetry axis. A section of the innermost magnetic barrier is symmetrical about the symmetry axis, so that the reluctance torque of the motor can be fully utilized to improve the output performance of the motor by means of the design of the multiple layers of magnetic barriers with the same symmetry axis. In addition, the two outermost magnetic barriers are not filled with magnetic substances, so that the magnetic substances are far away from the stator winding to reduce the risk of demagnetization of the magnetic substances.

The invention relates to a rotor structure suitable for improving weak magnetic speed expansion capability of a disc type motor, a rotor core is embedded in a groove of a rotor support disc, composite magnetic poles are uniformly distributed and attached to the surface of the rotor core, a magnetic isolation support and the rotor support disc are fixed together, and the composite magnetic poles are embedded in mounting grooves of the magnetic isolation support. The composite magnetic poles are composed of permanent magnets, parallel magnetic poles and series magnetic poles, the series magnetic poles are attached to the surfaces of the permanent magnets in the axial direction to form series parts of the magnetic poles, the series parts of the parallel magnetic poles and the series parts of the magnetic poles are arranged in parallel in a one-to-one correspondence mode in the radial direction, and the series parts of the parallel magnetic poles and the series parts of the magnetic poles form parallel parts of the magnetic poles. Compared with a surface-mounted disc type motor, the direct-axis inductance of the motor is obviously improved; and compared with a disc type motor with parallel combined magnetic poles, the output power is higher in the same speed expansion range. When the motor is used for a disc type motor, the disc type motor has a wide flux-weakening speed regulation range, and the loading capacity of the motor at a low speed is improved.

A motor and a cleaner comprising the same. The motor comprises a stator including a stator core; a rotating shaft arrangeable inside the stator; a rotor rotatable about the rotating shaft by electromagnetically interacting with the stator while the rotating shaft is arranged inside the stator; a housing to accommodate the stator and the rotor; and a bearing coupleable to the housing such that while the bearing is coupled to the housing, the bearing allows the stator and the rotor to be stably coupled to each other. While the stator and the rotor are accommodated in the housing, a center of the stator core and a center of the rotor along an extension direction of the rotating shaft is arranged at different positions from each other with respect to the extension direction of the rotating shaft.

The invention relates to a low-harmonic permanent magnet synchronous motor rotor punching sheet and a motor rotor, and relates to the technical field of permanent magnet synchronous motors. According to the scheme, the rotor punching sheet is provided with the first magnetic steel groove and the second magnetic steel groove which form a V shape and are symmetrical about the D axis of the motor rotor, and the opening of the V shape faces the outer circumferential wall of the rotor punching sheet body. According to the structure, the distribution of a motor rotor magnetic field is improved, the magnetic field is more uniform, the salient pole rate is higher, the weak magnetic speed expansion capability is stronger, the structural strength is better, the harmonic content is lower, and the sine property of the magnetic field can be improved. On the outer circumferential wall of the rotor punching sheet body, a first auxiliary groove is formed between the first magnetic isolation bridge and the second magnetic isolation bridge and close to the first magnetic isolation bridge, and a second auxiliary groove is formed between the second magnetic isolation bridge and the D shaft and close to the second magnetic isolation bridge. On the premise of ensuring the mechanical strength of the magnetic isolation bridge, the magnetic line direction is changed, the magnetic leakage is reduced, the air gap flux density waveform is improved, the harmonic content is reduced, and the torque ripple and electromagnetic noise are reduced.

A vehicle's electrified powertrain includes a battery pack linked to a traction power inverter module (TPIM) converting DC voltage from the battery pack into AC voltage. A rotary electric machine includes a stator energized by the TPIM's AC voltage, enclosing a rotor core capable of rotation. The rotor core contains slots holding conductive bars and permanent magnets, with conductive bars positioned closer to the rotor core's center. The conductive bars and permanent magnets are separated by gaps within each slot. An annular end ring assembly is present at one end of the rotor core, featuring terminal conductors connected to subsets of conductive bars and a secondary coil of a rotary transformer. When the stator is energized, the rotor shaft, connected to the rotor, rotates. The electric machine powers a transmission, which is coupled to the rotor shaft.

The invention discloses a multi-point composite cooling system for a high-torque-density permanent magnet synchronous motor, and relates to the technical field of motor cooling, on the basis of a spiral water channel of a casing, an annular water channel is additionally arranged on an end cover, radiating ribs are arranged on the inner wall of the end cover, and a water cooling plate is additionally arranged at the end part of a stator core. The water cooling plate and the shell spiral water channel share a cooling loop, and the end covers on the two sides adopt independent water channel design, so that the effect of a main cooling system is prevented from being influenced by flow resistance of the end covers. A casing spiral water channel serves as a main heat sink, and heat of a stator iron core and a winding linear part is absorbed through cooling liquid circulation; the end water cooling plate directly cools a magnetic field concentration area at the end of the stator, and the temperature rise at the end of the winding and the end of the stator is specifically inhibited; the independent water channel of the end cover realizes regional thermal isolation, thermal coupling with cooling liquid of the casing is avoided, a bearing / sealing component is cooled preferentially, and part of rotor heat is taken away through shafting conduction; and with the assistance of the surface area strengthening effect of the radiating ribs of the end cover, all-directional thermal management of key components of the motor is formed.

The invention relates to the technical field of synchronous motors, in particular to a low-voltage high-power high-efficiency permanent-magnet synchronous motor, which comprises a casing and an end cover fixedly mounted at one end of the casing, and further comprises a rotating shaft, a permanent-magnet motor and a permanent-magnet motor, the through hole is formed in the end cover; the filter plate is detachably mounted in the through hole, and a plurality of filter holes are formed in the filter plate; the multiple transverse plates are installed in the through holes from top to bottom in a linear array mode and located on one side of the filter plate, and intervals exist between the adjacent transverse plates and are the same; the lead screws are rotationally mounted in the through holes and located on one side of the transverse plate, and the number of the lead screws is equal to that of the transverse plate; the moving frame is movably mounted on the outer side of the lead screw, a chute is formed in one side of the moving frame, and the part provided with the chute is slidably attached to the surface of the transverse plate. According to the low-voltage high-power high-efficiency permanent magnet synchronous motor provided by the invention, small-amplitude shaking of the movable plate in the notch can be realized through the shaking assembly, a cleaned mixture is prevented from being adhered to the movable plate, and subsequent cleaning is facilitated.

The present invention discloses a split-type orbital rotor permanent magnet direct-drive wind turbine generator. The generator has a split-type structure and includes a main shaft. A stator is provided on the front circumferential surface of the main shaft. The stator is composed of multiple identical stator units spliced ​​in sequence along the circumferential direction to form a complete ring. A rotor composed of multiple rotor units is rotatably connected to the circumferential surface of the stator. The circumferential surface of the rotor is evenly distributed with multiple blades. The outer ring of the stator unit bracket is provided with a track and an iron core coil. The rotor unit bracket is correspondingly provided with a supporting roller and a magnetic pole module. The air gap is adjusted by the size of the roller. In addition, a cooling unit is provided through the structure of the generator itself. Through structural innovation, the present invention breaks through the volume and diameter limitations of the generator, realizes a main bearing-free design, reduces the electromagnetic air gap, and ensures a uniform circumferential air gap. The overall split-type modular design is adopted, which is convenient for production and transportation, thereby achieving the goal of reducing the cost of the generator and breaking free from foreign constraints.

An electric motor (1) is provided with a stator (2) in which stator coils (2B) are arranged circumferentially. A center point of the circumference is defined as a first center point (O1), and a position offset from the first center point (O1) is defined as a second center point (O2). The electric motor (1) comprises: a ring rotor (3) arranged within the stator (2) and having an annular shape around the second center point (O2); an eccentric shaft (4) mounted so that it is rotatable about the first center point (O1) and supports the ring rotor (3) so that the ring rotor (3) is rotatable about the second center point (O2); an output section (5) that outputs a rotation of the ring rotor (3); and a detector (7) that detects a position of the ring rotor (3) or the eccentric shaft (4). and a controller (8) that controls a time for the excitation of each of the stator coils (2B) based on a detection signal from the detector (7).

The invention discloses a hybrid magnetic barrier design method for improving the average torque of a permanent magnet generator, the motor type is a double permanent magnet vernier motor, a stator and a rotor are provided with permanent magnets, the stator is wound with an armature winding, and an air gap magnetic field is composed of a stator permanent magnet magnetic field, a rotor permanent magnet magnetic field and an armature magnetic field. The average torque is derived from the interaction of an armature magnetic field and stator and rotor permanent magnetic fields. The stator is composed of six E-shaped module units in space, non-air-gap magnetic barriers exist between the module units, air-gap magnetic barriers are added to the two sides of a permanent magnet of the stator and the two sides of a permanent magnet of the rotor respectively, and the average torque is improved by improving the working wave content of an armature magnetic field and the working wave content of a permanent magnet magnetic field through the two types of magnetic barrier structures respectively. The hybrid magnetic barrier is simple in structure, the average torque of the permanent magnet vernier motor can be improved by more than 30%, and meanwhile, the sine property of no-load back electromotive force is improved.

The utility model discloses a permanent magnet synchronous linear motor, which comprises a base and a motor stator arranged on the base, at least one side of the motor stator is provided with a coding component along the extension direction of the motor stator, and a partition piece is arranged between the coding component and the motor stator. The partition piece is arranged close to the end portion of the permanent magnet synchronous linear motor, and the upper surface of the partition piece is higher than the upper surface of the coding assembly. According to the permanent magnet synchronous linear motor of the utility model, the end part of the permanent magnet synchronous linear motor is provided with the partition member, so that the diffusion of an end part magnetic field can be isolated or inhibited, and the position detection of the rotor magnetic plate can be optimized.

Methods and systems are provided for an electric machine. In example, an electric machine includes a stator that electromagnetically interacts with a rotor during electric machine operation. The electric machine further includes a first gear coupled to or included in a rotor shaft, a spring assembly coupled to a first side of the rotor and exerting a first axial force on the rotor, and a second gear that meshes with the first gear and exerts a second axial force that is opposite the first axial force, where a magnitude of the second axial force corresponds to a rotor torque.

The coronal brushless motor includes: a stator; the rotor comprises a cylindrical core body part, the cylindrical core body part comprises a plurality of first extension parts extending from a first end part of the cylindrical core body part and a plurality of second extension parts extending from a second end part of the cylindrical core body part; and a static wire disposed around the cylindrical core member to magnetize the cylindrical core member to generate a magnetic flux in an axial direction of the cylindrical core member; wherein the plurality of first extension portions and the plurality of second extension portions are configured to separate and guide the magnetic flux when the cylindrical core member is magnetized by the static coil wires, and to change a direction of the magnetic flux from an axial direction to a direction different from the axial direction.

The application provides a kind of stator double permanent magnet multi-tooth structure magnetic flux switching motor and its working method, belongs to permanent magnet variable reluctance motor technical field. Including coaxial arrangement stator core and rotor core, still including two sets of permanent magnets, stator core protruding arrangement has multiple equal angle interval arrangement big teeth, form solid slot between adjacent big teeth, each big tooth end is provided with small tooth, and define first virtual slot and two sides second virtual slot, rotor core is provided with multiple rotor teeth. Two sets of permanent magnets are tangential magnetization spoke yoke permanent magnet and radial magnetization slot permanent magnet respectively, spoke yoke permanent magnet is set in second virtual slot, slot permanent magnet is set in solid slot mouth and first virtual slot, the pole pair number of two sets of permanent magnets is equal to the number of big teeth on stator core, and the solid slot between big teeth is embedded with armature winding. Can solve the problem of low utilization rate of iron core and low motor output torque caused by structural defects in prior art traditional permanent magnet magnetic flux switching motor.

This invention relates to an intelligent integrated permanent magnet synchronous motor, which includes a motor body, an electronic control unit, and a display screen unit. The motor body includes a motor housing, a motor shaft, a motor stator, and a motor rotor. Connecting bearings are respectively provided in the two side walls of the motor housing. The connecting bearing includes an outer bearing ring, an inner bearing ring, and several rollers. The inner bearing ring is sleeved on the motor shaft. The inner bearing ring includes a bearing ring sleeve tube and a fan sleeve tube. The fan sleeve tube is fixedly connected to the inner end of the bearing ring sleeve tube and is located in the motor housing. The fan sleeve tube, the bearing ring sleeve tube, and the motor shaft have the same central axis.

This application relates to a rotor core, a rotor assembly, a motor, and a vehicle. The rotor core includes magnetic slots and a first set of magnetic barrier slots. Multiple magnetic slots are spaced apart circumferentially along the rotor core and extend radially along the rotor core. The first set of magnetic barrier slots is disposed between two adjacent magnetic slots and includes multiple magnetic barrier slots arranged sequentially radially along the rotor core. By placing the first set of magnetic barrier slots between two adjacent magnetic slots and including multiple magnetic barrier slots arranged sequentially radially along the rotor core, the air in the magnetic barrier slots has low permeability. Since magnetic reluctance increases and decreases with permeability, the arrangement of the first set of magnetic barrier slots increases the d-axis magnetic reluctance between two adjacent permanent magnet assemblies and significantly reduces the d-axis inductance. This increases the salient pole ratio and the proportion of reluctance torque in the motor, which is beneficial for improving the motor's field weakening speed-up capability.

A machine assembly includes a ferromagnetic annular rotor rotatable about a central vertical axis and configured to support at least one object. A plurality of levitation actuators are spaced circumferentially about the central axis and radially outwardly from the rotor. Each levitation actuator includes a permanent magnet configured to exert an attractive force on the rotor to levitate the rotor above a base surface, the attractive force having a vertical component along the central axis. A plurality of axial adjustment actuators are spaced circumferentially about the central axis and radially outwardly from the rotor. Each axial adjustment actuator includes an electromagnet configured to exert an attractive force on the rotor to adjust the position of the rotor along the central axis, the attractive force of each axial adjustment actuator having a vertical component directed in an opposing axial direction from the vertical component of the levitation actuators attractive force.

The invention provides a framework splicing block, a motor framework, an iron core and a motor, relates to the technical field of motors, and solves the technical problems that a traditional splicing block motor is complex in assembly process, difficult in slot insulation installation and lack of an excitation adjusting function. The framework splicing block comprises a splicing block body, a buckling point structure is arranged at one end of the splicing block body, a buckling hole structure is arranged at the other end of the splicing block body, and the splicing block bodies are connected through cooperation. The splicing block body is further provided with an auxiliary winding receding groove and a silicon steel block groove, and the pointing angle of the silicon steel block groove is set according to needs so as to optimize the magnetic field layout. The groove insulation and the frameworks are integrally formed, and axial deviation is prevented through a concave-convex meshing structure of the upper framework and the lower framework. The device has the advantages of being simple in structure, convenient to assemble, high in efficiency and high in applicability.

The invention provides a hybrid excitation magnetic circuit structure, a motor with the structure and a control method of the motor. According to the hybrid excitation magnetic circuit structure, basic magnetic flux is provided through a permanent magnet rotor assembly, the magnetic flux is dynamically adjusted through an electro-magnetic winding assembly, and superposition enhancement or partial counteracting of a main air gap magnetic field can be achieved only by switching the direction of electro-magnetic current; the output torque of the motor is obviously enhanced; and second-direction current is conducted in a constant power area to counteract part of magnetic flux and expand the speed regulation range of the motor, so that various working condition requirements can be met, and wide-range efficient operation is realized.

The invention discloses a motor, a compressor and refrigeration equipment, and relates to the technical field of motors, the motor comprises a stator iron core and a rotor iron core, a stator punching sheet of the stator iron core comprises a stator yoke and a plurality of stator teeth distributed along the inner circumference of the stator yoke at intervals, two adjacent stator teeth and the stator yoke enclose a stator slot, the number of the stator slots is Q, the maximum outer circle contour radius of the stator punching sheet is R1, and the minimum inner circle contour radius of the stator punching sheet is R2. The rotor core is formed by stacking a plurality of rotor punching sheets, the rotor punching sheets are provided with a plurality of magnetic steel grooves along the circumferential direction, magnetic steel is installed in the magnetic steel grooves, so that the rotor core forms a plurality of magnetic poles which are alternately distributed along the circumferential direction, the number of the magnetic poles is 2P, and the greatest common divisor of 2P and Q is N; 2.5 < = N * (R2 / R1) < = 3.5, and the unit of R1 and R2 is mm. The technical scheme provided by the invention aims to improve the magnetic flux and rotational inertia of the motor under each magnetic pole of the motor, and further improve the power density and efficiency of the motor.

The present application provides a rotor assembly and a self-starting permanent magnet synchronous reluctance electric motor. The rotor assembly includes a rotor core 1, and in a cross section of the rotor core 1, the rotor core 1 includes slit grooves 2, a q-axis squirrel-cage groove 41, and permanent magnets 3, the q-axis squirrel-cage grooves 41 are provided at both ends of the slit grooves 2, the permanent magnets 3 are arranged in the slit grooves 2, at least the permanent magnets 3 located in the innermost layer in the d-axis direction are arranged asymmetrically with respect to the d-axis, and the offset direction of the permanent magnets 3 located in the innermost layer with respect to the d-axis is the same as the rotation direction of the rotor assembly.

A rotor (100) for an electrical machine, wherein the electrical machine is designed as an electrically excited synchronous machine, wherein the rotor (100) is designed as a salient-pole rotor, comprises a body (110) with rotor teeth (112) and a pole head ring (120). The pole head ring (120) comprises a plurality of pole heads (122) arranged spaced apart from one another along a circumference of the pole head ring (120). Each of the pole heads (122) is shaped for coupling to one of the rotor teeth (112). The pole head ring (120) comprises a plurality of permanent magnets (130).

A displacement type built-in multilayer arc-shaped permanent magnet rotor relates to the technical field of motors, and comprises a rotor core, a plurality of permanent magnet units are arranged on the rotor core, the permanent magnet units are symmetrically arranged around the axis of the rotor core, each permanent magnet unit comprises three arc-shaped magnetic steel groups, the two ends of each arc-shaped magnetic steel group face outwards, and the two ends of each arc-shaped magnetic steel group face outwards. The three arc-shaped magnetic steel groups are sequentially arranged from inside to outside in the radial direction of the rotor iron core, air permanent magnet grooves are formed in the two ends of each arc-shaped magnetic steel group, each arc-shaped magnetic steel group comprises a plurality of arc-shaped magnetic steels with different magnetic steel widths, and separation iron cores are arranged among the plurality of arc-shaped magnetic steels. The rotor provided by the invention can reduce motor noise and torque ripple.

This invention relates to the field of electric motors, specifically to an electric motor rotor and a permanent magnet synchronous motor. The electric motor rotor includes a rotor core with multiple magnetic poles. Each magnetic pole has a first magnetic slot unit and a magnetic pole centerline d-axis corresponding to the first magnetic slot unit. The first magnetic slot unit is filled with a first permanent magnet, which forms a first magnetic flux. On a cross-section perpendicular to the centerline of the rotor core, the first magnetic flux has a concave side and a convex side opposite to the concave side in the d-axis direction. The concave side of the first magnetic flux is close to the center of the rotor core. This improves magnetic flux, increases motor efficiency, reduces motor harmonics, and reduces motor operating noise.