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CN-122026649-A - Oblique pole rotor and permanent magnet synchronous motor

CN122026649ACN 122026649 ACN122026649 ACN 122026649ACN-122026649-A

Abstract

The invention provides a skewed pole rotor and a permanent magnet synchronous motor, wherein the skewed pole rotor comprises a rotor core, the rotor core is provided with a magnetic steel groove, magnetic steel modules are arranged in the magnetic steel groove, each magnetic steel module comprises a plurality of magnetic steels which are sequentially arranged along the length direction of the magnetic steel groove, the positions of the magnetic steels in the width direction of the magnetic steel groove are adjusted, the plurality of magnetic steels can integrally form skewed poles of different structures, the realization mode of the skewed pole is adjusted to be a simple magnetic steel position by a complex mechanical structure, the structure of the rotor is greatly simplified, the assembly difficulty is reduced, the production efficiency is improved, the positions of each magnetic steel in the width direction of the magnetic steel groove are independently adjustable, different skewed pole angles and skewed pole structures can be flexibly configured on the same rotor core according to performance requirements, the limitation that the skewed pole characteristics of the existing skewed pole rotor are fixed once the existing skewed pole rotor is manufactured is broken, the design flexibility and the universality of rotor parts are remarkably improved, and more ideal equivalent magnetic field distribution can be obtained.

Inventors

  • WEN XINQIANG
  • LING YIBIN
  • JIANG SHENGJUN
  • LONG FANG

Assignees

  • 珠海凌达压缩机有限公司
  • 珠海格力电器股份有限公司

Dates

Publication Date
20260512
Application Date
20251229

Claims (16)

  1. 1. The oblique pole rotor is characterized by comprising a rotor core (1), wherein the rotor core (1) is provided with a magnetic steel groove (11), and magnetic steel modules are arranged in the magnetic steel groove (11), each magnetic steel module comprises a plurality of magnetic steels (2), and the magnetic steels (2) are sequentially arranged along the length direction of the magnetic steel groove (11); the position of each magnetic steel (2) in the width direction of the magnetic steel groove (11) can be adjusted, and the plurality of magnetic steels (2) can integrally form oblique poles with different structures by adjusting the positions of the plurality of magnetic steels (2) in the width direction of the magnetic steel groove (11); The length direction of the magnetic steel groove (11) is parallel to the axial direction of the oblique pole rotor, and the width direction of the magnetic steel groove (11) is perpendicular to the length direction of the magnetic steel groove (11).
  2. 2. The skewed pole rotor of claim 1, wherein the slot wall of the magnet steel slot (11) is provided with an adjusting mechanism at a position corresponding to each magnet steel (2), the adjusting mechanism is provided with an abutting end which can extend into the magnet steel slot (11), and the abutting end is abutted with the magnet steel (2) and used for fixing the magnet steel (2); The position of the abutting end in the width direction of the magnetic steel groove (11) can be adjusted, the position of the magnetic steel (2) in the width direction of the magnetic steel groove (11) can be adjusted by adjusting the position of the abutting end in the width direction of the magnetic steel groove (11), or, The magnetic steel (2) can be fixed at different positions in the width direction of the magnetic steel groove (11) by adjusting the position of the magnetic steel (2) in the width direction of the magnetic steel groove (11) and enabling the abutting end to abut against different positions of the magnetic steel (2).
  3. 3. The skewed pole rotor of claim 2 wherein the adjustment mechanism is disposed on a wall of the magnetic steel groove (11) in such a manner that a length of the adjustment mechanism extending into the magnetic steel groove (11) is adjustable, and wherein a position of the abutment end within the magnetic steel groove (11) is adjustable by adjusting a length of the adjustment mechanism extending into the magnetic steel groove (11).
  4. 4. A skewed pole rotor according to claim 3, wherein a steel-magnet-groove through hole (113) is formed in the groove wall of the steel-magnet-groove (11), the steel-magnet-groove through hole (113) is communicated with the steel-magnet-groove (11), the adjusting mechanism comprises an adjusting piece (33) and an abutting piece (34), the adjusting piece (33) is movably arranged in the steel-magnet-groove through hole (113), the tail end (332) of the adjusting piece (33) stretches into the steel-magnet-groove (11), the abutting piece (34) is arranged at the tail end (332) of the adjusting piece (33) and is positioned in the steel-magnet-groove (11), and the abutting piece (34) is provided with the abutting end; by moving the adjusting member (33) in the magnetic steel groove through hole (113), the length of the adjusting member (33) extending into the magnetic steel groove (11) can be adjusted.
  5. 5. The skewed pole rotor of claim 4, wherein the slot walls in the width direction of the magnetic steel slots (11) are formed with the magnetic steel slot through holes (113), and the hole depth direction of the magnetic steel slot through holes (113) is parallel to the width direction of the magnetic steel slots (11).
  6. 6. The oblique pole rotor according to claim 5, wherein a plurality of magnetic steel grooves (11) are provided, the plurality of magnetic steel grooves (11) are sequentially arranged along the circumferential direction of the oblique pole rotor, and a magnetism isolating bridge (12) is arranged between two adjacent magnetic steel grooves (11); The rotor core (1) is characterized in that a groove (13) is formed in the position, corresponding to the magnetism isolating bridge (12), of the peripheral wall of the rotor core (1), a groove through hole (133) is formed in the groove wall, close to the magnetic steel groove (11), of the groove (13), the groove through hole (133) corresponds to the magnetic steel groove through hole (113), and the groove (13), the groove through hole (133), the magnetic steel groove through hole (113) and the magnetic steel groove (11) are sequentially communicated; the adjusting piece (33) is arranged in the magnetic steel groove through hole (113) through the groove through hole (133), the head end (331) of the adjusting piece (33) is arranged in the groove (13), and the adjusting piece (33) can move in the magnetic steel groove through hole (113) through operating the head end (331) of the adjusting piece (33).
  7. 7. The skewed pole rotor of claim 6, wherein the adjustment member (33) and the magnetic steel slot through hole (113) are connected by threads, and the length of the adjustment member (33) extending into the magnetic steel slot (11) is adjustable by rotating the adjustment member (33); The abutting end is provided with an abutting piece abutting surface (341), the magnetic steel (2) is provided with a magnetic steel abutting surface (21), the abutting piece abutting surface (341) is matched with the magnetic steel abutting surface (21), and the abutting of the abutting end and the magnetic steel (2) can be achieved; the abutting piece (34) and the tail end (332) of the adjusting piece (33) can be movably connected, and the abutting piece is used for enabling the abutting piece abutting surface (341) to be attached to the magnetic steel abutting surface (21), so that the abutting end can be applicable to the magnetic steel (2) with different shapes.
  8. 8. The skewed pole rotor of claim 7, wherein the abutment member (34) and the trailing end (332) of the adjustment member (33) are connected by a spherical structure (35).
  9. 9. The oblique pole rotor according to claim 7, characterized in that the groove (13) is provided with an angle dial (41) near the groove wall of the magnetic steel groove (11) at the groove through hole (133), the center of the angle dial (41) is positioned on the rotating shaft of the adjusting piece (33), the head end (331) of the adjusting piece (33) is provided with a pointer (42), and the pointer (42) can synchronously rotate along with the adjusting piece (33); By rotating the adjusting member (33) and observing the indication of the pointer (42) on the angle dial (41), the length of the adjusting member (33) extending into the magnetic steel groove (11) can be adjusted.
  10. 10. The oblique pole rotor according to claim 7, characterized in that the groove (13) is provided with a swingable pawl (51) near the groove wall of the magnetic steel groove (11) at the groove through hole (133), the pawl (51) is made of elastic material or an elastic piece (52) is arranged between the pawl (51) and the groove wall, the head end (331) of the adjusting piece (33) is provided with a plurality of clamping grooves (333), and the clamping grooves (333) are sequentially arranged around the rotating shaft of the adjusting piece (33); After the length of the adjusting piece (33) extending into the magnetic steel groove (11) is adjusted to be in place, the pawl (51) is clamped into the corresponding clamping groove (333), so that the adjusting piece (33) can be locked on the groove wall.
  11. 11. Skewed pole rotor according to claim 7, wherein the magnetic steel abutment surface (21) is coated with a wear resistant coating.
  12. 12. The skewed pole rotor according to any of claims 2 to 11, wherein the groove walls of the magnetic steel groove (11) comprise a first magnetic steel groove wall (111) and a second magnetic steel groove wall (112) which are oppositely arranged in the width direction of the groove walls, the adjusting mechanism comprises a first adjusting mechanism (31) and a second adjusting mechanism (32), a plurality of first adjusting mechanisms (31) are arranged on the first magnetic steel groove wall (111), a plurality of first adjusting mechanisms (31) and a plurality of magnetic steels (2) are arranged in a one-to-one correspondence manner, a plurality of second adjusting mechanisms (32) are arranged on the second magnetic steel groove wall (112), and a plurality of second adjusting mechanisms (32) and a plurality of magnetic steels (2) are arranged in a one-to-one correspondence manner; the position of the magnetic steel (2) in the width direction of the magnetic steel groove (11) can be adjusted by cooperatively adjusting the position of the abutting end of the first adjusting mechanism (31) and the abutting end of the second adjusting mechanism (32) corresponding to each magnetic steel (2) in the width direction of the magnetic steel groove (11).
  13. 13. The oblique pole rotor according to claim 1, wherein the positions of the plurality of magnetic steels (2) in the width direction of the magnetic steel groove (11) can be adjusted according to actual application scenes and working conditions, so that the plurality of magnetic steels (2) integrally form oblique poles of corresponding structures; the integrally formed oblique poles of the magnetic steels (2) comprise single-side oblique poles, double-side oblique poles, Z-type oblique poles and similar non-segmented oblique poles; When the magnetic steel (2) integrally forms the single-side oblique pole, the gravity centers of the magnetic steel (2) are staggered in sequence in the width direction of the magnetic steel groove (11), when the magnetic steel (2) integrally forms the double-side oblique pole, one part of the gravity centers of the magnetic steel (2) are close to one side of the magnetic steel groove (11) in the width direction, the other part of the gravity centers of the magnetic steel (2) are close to the other side of the magnetic steel groove (11), when the magnetic steel (2) integrally forms the Z-shaped oblique pole, the gravity centers of the adjacent two magnetic steel (2) are staggered in the width direction of the magnetic steel groove (11), and when the magnetic steel (2) integrally forms the similar non-segmented oblique pole, the gravity centers of the magnetic steel (2) are staggered in sequence in the width direction of the magnetic steel groove (11), and the magnetic steel (2) integrally forms a magnetic steel assembly with a parallelogram cross section.
  14. 14. The skewed pole rotor of claim 1, wherein the rotor core (1) is of unitary construction.
  15. 15. A permanent magnet synchronous motor, characterized by comprising a stator and the skewed pole rotor according to any one of claims 1 to 14, wherein the skewed pole rotor is arranged inside the stator, and the skewed pole rotor and the stator are coaxially arranged.
  16. 16. The permanent magnet synchronous motor according to claim 15, wherein the stator has stator slots, the stator slots having stator windings wound therein; the included angle between the center plane of the magnetic steel grooves (11) and the gravity center plane of the magnetic steel (2) is theta, the number of the stator grooves is Q, the number of the magnetic steel (2) in each magnetic steel groove (11) is k, and the number of poles of the oblique pole rotor is P; the θ, Q, k, and P satisfy: The center plane of the magnetic steel groove (11) is a plane passing through the axis of the oblique pole rotor and the axial center line of the magnetic steel groove (11), the axial center line of the magnetic steel groove (11) is parallel to the axis of the oblique pole rotor, the center of gravity plane of the magnetic steel (2) is a plane passing through the axis of the oblique pole rotor and the center of gravity of the magnetic steel (2), the GCD is the greatest common divisor, the j is a positive integer, and j is less than or equal to 3.

Description

Oblique pole rotor and permanent magnet synchronous motor Technical Field The invention belongs to the technical field of motors, and particularly relates to an oblique pole rotor and a permanent magnet synchronous motor. Background The permanent magnet synchronous motor is widely applied in the fields of electric automobiles, industrial driving, wind power generation and the like due to the advantages of high efficiency, high power density, quick dynamic response and the like. The design and optimization of the rotor are key to improving the performance of the permanent magnet synchronous motor, wherein the adoption of the oblique pole technology is an effective means for weakening cogging torque, reducing torque pulsation and reducing iron loss and eddy current loss. At present, the mainstream rotor sectional type oblique pole technology is realized by mainly dividing a rotor core into a plurality of sections along the axial direction, and forming a certain torsion angle between each section of rotor core by adopting an asymmetric key slot and matching with the mode of laminating the front side and the back side of a rotor punching sheet, thereby realizing oblique poles. However, the technical scheme has the defects that the manufacturing and assembling precision requirements are high depending on the physical segmentation of the rotor core and the positive and negative lamination operation of the punching sheet, once the rotor core is laminated and fastened, the formed oblique pole angle and the oblique pole structure (such as continuous oblique poles, segmented oblique poles and the like) are fixed, any adjustment cannot be performed according to the actual operation working condition or performance optimization requirement of the motor, and the flexibility is lacking. Disclosure of Invention In view of this, the invention provides a skewed pole rotor and a permanent magnet synchronous motor, which are used for solving the problems of complex structure, complex process, low assembly efficiency, narrow application range of the skewed pole rotor caused by unadjustable skewed pole angle and structure in the existing skewed pole rotor, and the like. The invention provides an oblique pole rotor, which comprises a rotor iron core, wherein the rotor iron core is provided with a magnetic steel groove, and a magnetic steel module is arranged in the magnetic steel groove; The position of each magnetic steel in the width direction of the magnetic steel groove is adjustable, and the plurality of magnetic steels can integrally form oblique poles with different structures by adjusting the positions of the plurality of magnetic steels in the width direction of the magnetic steel groove; The length direction of the magnetic steel groove is parallel to the axial direction of the oblique pole rotor, and the width direction of the magnetic steel groove is perpendicular to the length direction of the magnetic steel groove. Further alternatively, the groove wall of the magnetic steel groove is provided with an adjusting mechanism at the position corresponding to each magnetic steel, the adjusting mechanism is provided with an abutting end which can extend into the magnetic steel groove, and the abutting end is abutted with the magnetic steel and used for fixing the magnetic steel; The position of the abutting end in the width direction of the magnetic steel groove can be adjusted, and the position of the magnetic steel in the width direction of the magnetic steel groove can be adjusted by adjusting the position of the abutting end in the width direction of the magnetic steel groove, or, The magnetic steel is fixed at different positions in the width direction of the magnetic steel groove by adjusting the position of the magnetic steel in the width direction of the magnetic steel groove and enabling the abutting end to abut against different positions of the magnetic steel. Further alternatively, the adjusting mechanism is arranged on the groove wall in a mode of adjusting the length of the adjusting mechanism extending into the magnetic steel groove, and the position of the abutting end in the magnetic steel groove can be adjusted by adjusting the length of the adjusting mechanism extending into the magnetic steel groove. The device comprises a magnetic steel groove, an adjusting mechanism, an abutting piece, a pressing piece and a pressing piece, wherein the magnetic steel groove is formed in the groove wall of the magnetic steel groove, the magnetic steel groove is communicated with the magnetic steel groove, the adjusting mechanism comprises an adjusting piece and the abutting piece, the adjusting piece is movably arranged in the magnetic steel groove through hole, and the tail end of the adjusting piece stretches into the magnetic steel groove; The length of the adjusting piece extending into the magnetic steel groove can be adjusted by enabling the adjusting piece to move in the magnetic steel groove through hole. Furt