Search

CN-122026644-A - Stator assembly, rotor assembly, motor and clothes treatment equipment

CN122026644ACN 122026644 ACN122026644 ACN 122026644ACN-122026644-A

Abstract

The invention provides a stator assembly, a rotor assembly, a motor and clothes treatment equipment, and belongs to the technical field of segmented motors. The stator assembly comprises a plurality of stator blocks uniformly distributed along the circumference, wherein the rotor assembly is arranged in a preset circumference formed by the stator blocks, the stator blocks comprise stator iron cores and coil windings, the stator iron cores extend along the central axis direction of the preset circumference, and the coil windings are wound on the stator iron cores. According to the scheme provided by the invention, the structural design is reasonable, and the stator iron core extending along the central axis direction of the preset circumference is arranged, so that iron loss rise caused by excessive seams of the stator iron core in the magnetic circuit direction can be avoided, the utilization rate of magnetic steel is further improved, and the motor efficiency is further improved.

Inventors

  • GONG HAITAO

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 (17)

  1. 1. The stator assembly is characterized by comprising a plurality of stator segments (110) which are uniformly distributed along the circumference, wherein a rotor assembly (200) is arranged in a preset circumference formed by the stator segments (110), the stator segments (110) comprise stator cores (111) and coil windings (112), the stator cores (111) extend along the central axis direction of the preset circumference, and the coil windings (112) are wound on the stator cores (111).
  2. 2. The stator assembly according to claim 1, wherein the stator core (111) includes a first tooth portion (111-1) and a second tooth portion (111-2) provided at both ends in an extending direction thereof, and a yoke portion (111-3) which is located between the first tooth portion (111-1) and the second tooth portion (111-2) and has a side recessed inward to form a recessed portion, the coil winding (112) being wound around the yoke portion (111-3).
  3. 3. The stator assembly according to claim 2, characterized in that the first tooth (111-1) and the second tooth (111-2) are directed towards the inside of the preset circumference.
  4. 4. The stator assembly of claim 2, wherein the stator segment (110) further comprises an insulation layer wrapped around a surface of the yoke (111-3), the coil winding (112) being wound outside the insulation layer.
  5. 5. The stator assembly according to claim 4, wherein the first tooth portion (111-1) and the second tooth portion (111-2) have dimensions L1, L2, respectively, in the direction of the central axis of the preset circumference, the yoke portion (111-3) has a dimension L3 in the direction of the central axis of the preset circumference, the yoke portion (111-3) has a thickness B, and the L1, L2, L3 and B satisfy the following relation: L1=L2; 0.8≤L1/B≤1.2; 1≤L3/L1≤1.5。
  6. 6. the stator assembly according to claim 1, characterized in that the stator core (111) comprises a plurality of magnetically conductive sheets arranged in a stack along its extension direction, or that the stator core (111) is die-cast from a magnetic material powder.
  7. 7. The stator assembly according to any one of claims 1 to 6, wherein the stator assembly (100) further comprises stator holders (120) located at both ends of the plurality of stator segments (110), respectively; The stator fixing frame (120) is provided with a positioning structure for inserting the end parts of the stator iron cores (111), a plurality of positioning structures are in one-to-one correspondence with a plurality of stator sub-blocks (110), and the end parts of the two ends of the stator iron cores (111) are respectively in positioning connection with the corresponding positioning structures.
  8. 8. The stator assembly according to claim 7, wherein the stator core (111) is provided with step structures (111-4) at both ends thereof, the positioning structure being configured as step grooves (121) matching the step structures (111-4), the step structures (111-4) being inserted into the corresponding step grooves (121).
  9. 9. The stator assembly of claim 7, wherein the stator mount (120) is of a non-magnetic material.
  10. 10. A rotor assembly characterized by being arranged within a predetermined circumference formed by the stator assembly (100), the rotor assembly (200) comprising a rotor core and a plurality of magnetic steels uniformly distributed within the rotor core along the circumference.
  11. 11. The rotor assembly of claim 10, wherein the rotor core comprises a first magnetically permeable layer (211) and a second magnetically permeable layer (212) disposed at both ends, and a third magnetically permeable layer (213) between the first magnetically permeable layer (211) and the second magnetically permeable layer (212); A plurality of first magnetic steels (221) are uniformly arranged in the first magnetically permeable layer (211) along the circumference, a plurality of second magnetic steels (222) are uniformly arranged in the second magnetically permeable layer (212) along the circumference, and the plurality of first magnetic steels (221) and the plurality of second magnetic steels (222) are arranged in a one-to-one correspondence; The rotor core is formed by laminating the first magnetically permeable layer (211), the second magnetically permeable layer (212) and the third magnetically permeable layer (213) in the direction of the central axis of the rotor assembly (200).
  12. 12. The rotor assembly of claim 11 wherein the rotor core is provided with a plurality of receiving slots extending in a direction of a central axis and uniformly distributed along a circumference, and the magnetic steel is inserted into the receiving slots.
  13. 13. The rotor assembly of claim 11, wherein the corresponding first magnetic steel (221) and second magnetic steel (222) have opposite polarity of magnetic poles; And along the circumferential direction, the polarities of the magnetic poles of the adjacent two first magnetic steels (221) are opposite, and the polarities of the magnetic poles of the adjacent two second magnetic steels (222) are opposite.
  14. 14. The rotor assembly of claim 11 wherein the first magnetically permeable layer (211) and the second magnetically permeable layer (212) have dimensions in the direction of the central axis of R1, R2, respectively, wherein R1 and R2 satisfy the relationship r1=r2.
  15. 15. An electric machine comprising a stator assembly (100) according to any one of claims 1 to 9, and further comprising a rotor assembly (200) according to any one of claims 10 to 14, said rotor assembly (200) being interposed within a preset circumference defined by a plurality of stator segments (110) of said stator assembly (100).
  16. 16. The electric machine according to claim 15, wherein the first tooth portion (111-1) and the second tooth portion (111-2) in the stator assembly (100) have dimensions L1, L2, respectively, in a direction of a central axis of the preset circumference, the yoke portion (111-3) has dimensions L3, respectively, in a direction of a central axis of the preset circumference, the first magnetically permeable layer (211) and the second magnetically permeable layer (212) in the rotor assembly (200) have dimensions R1, R2, respectively, in a direction of a central axis of the preset circumference, the third magnetically permeable layer (213) has dimensions R3, in a direction of a central axis of the preset circumference, the L1, L2, L3, R1, R2, and R3 satisfying the following relation: L1=L2=R1=R2; L3=R3。
  17. 17. a laundry treatment apparatus comprising the motor of any one of claims 15 to 16.

Description

Stator assembly, rotor assembly, motor and clothes treatment equipment Technical Field The invention belongs to the technical field of partitioned motors, and particularly relates to a stator assembly, a rotor assembly, a motor and clothes treatment equipment. Background The concentrated winding motor adopts a winding mode to tightly wind the coil on the stator teeth, so that the coil length can be reduced, and the cost is effectively reduced. Because the winding process is to run through the winding needle in a single shuttle mode of the stator teeth, a part of stator slot area is required to be used for the winding needle to pass through, so that a part of stator slot area is occupied, and the limit of the effective area of the coil winding can only be about 75%. The stator core is divided into independent core blocks at the stator yoke part of the segmented motor, winding is divided on the separated core blocks, and then the assemblies of the core blocks and coils are assembled into a whole circle to form a complete stator core, so that the area of a winding type stator slot is increased to more than 90%, and the motor efficiency is further improved. However, in practical testing, it was found that on motors less than 2000W, a segmented motor would not have the advantage of efficiency over a wound needle wound motor with a complete core, even if the slot fill rate was increased above 90%. The analysis test data shows that the iron loss is overlarge, the iron core blocks are formed by silicon steel sheets, the edges of the silicon steel sheets are amplified due to the fact that internal grains are broken in the stamping process of the silicon steel sheets, meanwhile, the clamping coefficient of a magnetic circuit is reduced due to the fact that splicing gaps exist between adjacent iron core blocks, and finally the loss caused by the rising of the iron loss of the iron core blocks is larger than the coil copper loss reduction caused by the rising of the groove fullness rate, so that the motor efficiency is reduced. Disclosure of Invention The invention aims at overcoming the defects in the prior art, and provides a stator assembly, a rotor assembly, a motor and clothes treatment equipment, which aim to solve the problem that the iron loss is increased due to the adoption of an iron core arranged in a planar block manner in the conventional block type motor. The invention provides a stator assembly, which comprises a plurality of stator sub-blocks uniformly distributed along the circumference, wherein a rotor assembly is arranged in a preset circumference formed by the plurality of stator sub-blocks, the stator sub-blocks comprise a stator iron core and a coil winding, the stator iron core extends along the central axis direction of the preset circumference, and the coil winding is wound on the stator iron core. Further, the stator core includes a first tooth portion and a second tooth portion provided at both ends in an extending direction thereof, and a yoke portion located between the first tooth portion and the second tooth portion and having one side recessed inward to form a recessed portion, and the coil winding is wound around the yoke portion. Further, the first tooth portion and the second tooth portion face inward of the preset circumference. Further, the stator segment further comprises an insulating layer, the insulating layer wraps the surface of the yoke, and the coil winding is wound outside the insulating layer. Further, the first tooth portion and the second tooth portion are L1 and L2 in the direction of the central axis of the preset circumference, the yoke portion is L3 in the direction of the central axis of the preset circumference, the thickness of the yoke portion is B, and the thicknesses of the yoke portion, L1, L2, L3 and B meet the following relations that L1=L2, 0.8-L1/B-1.2 and 1-L3/L1-1.5. Further, the stator core includes a plurality of magnetic conductive sheets laminated along an extending direction thereof, or the stator core is die-cast from magnetic material powder. The stator assembly further comprises stator fixing frames respectively positioned at two ends of the plurality of stator sub-blocks, wherein the stator fixing frames are provided with positioning structures for inserting the end parts of the stator iron cores, the plurality of positioning structures correspond to the plurality of stator sub-blocks one by one, and the end parts of the two ends of the stator iron cores are respectively in positioning connection with the corresponding positioning structures. Further, the end parts of the two ends of the stator core are provided with step structures, the positioning structure is configured into step grooves matched with the step structures, and the step structures are inserted into the corresponding step grooves. Further, the stator fixing frame is made of non-magnetic materials. Correspondingly, the invention also provides a rotor assembly which is arranged in