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CN-122001105-A - Stator core, motor, and method for manufacturing stator core

CN122001105ACN 122001105 ACN122001105 ACN 122001105ACN-122001105-A

Abstract

The invention discloses a stator core, a motor and a manufacturing method of the stator core, and relates to the technical field of motors. In the stator yoke of the stator core, the thicknesses of the first core element and the second core element can be set to be narrower, so that tearing and protruding are not easy to occur in the process of forming the first core element with the spiral structure and/or the second core element with the spiral structure in a winding mode. In addition, the second iron core element is additionally arranged to thicken the thickness of the stator yoke in the stator core, so that the stator core is convenient to be applied to motors with fewer poles.

Inventors

  • YU JIKUN
  • CHEN WENXIN
  • YAN XIULONG

Assignees

  • 苏州汇川联合动力系统股份有限公司

Dates

Publication Date
20260508
Application Date
20241101

Claims (12)

  1. 1. A stator core, comprising: A first core element having a yoke portion, and The second iron core element is independent of the first iron core element, the first iron core element and/or the second iron core element are of a spiral structure, the second iron core element is located on the periphery of the first iron core element, and the second iron core element is fixed with the yoke portion to form a stator yoke.
  2. 2. The stator core of claim 1, further comprising a filler filled between the yoke portion and the second core element to secure the second core element to the yoke portion and form a stator yoke.
  3. 3. The stator core according to claim 2, wherein the filler is made of a resin material.
  4. 4. A stator core according to any of claims 1 to 3, wherein the first core element has a plurality of stator teeth thereon, adjacent stator teeth forming stator slots with the yoke.
  5. 5. A stator core according to any of claims 1 to 3, further comprising stator teeth cooperating with the first core element, adjacent stator teeth forming stator slots with the yoke.
  6. 6. A stator core according to any one of claims 1 to 3, wherein the difference between the outer radius of the stator yoke and the inner radius of the stator yoke is the thickness of the stator yoke, the thickness of the stator yoke being greater than or equal to 10mm.
  7. 7. An electric machine comprising a housing and a stator core as claimed in any one of claims 1 to 6, the housing being connected to the stator core, the housing having a liquid inlet and a liquid outlet.
  8. 8. An electric machine as claimed in claim 7, characterized in that the second core element is provided with a cooling channel, which cooling channel communicates with the liquid inlet and the liquid outlet.
  9. 9. The motor of claim 7 wherein the outer periphery of said second core element is provided with cooling channels, said housing being connected to said second core element, said cooling channels forming cooling channels, said cooling channels being in communication with said liquid inlet and said liquid outlet.
  10. 10. A method of manufacturing a stator core, the method comprising the steps of: Providing a first film roll unit comprising a yoke and a plurality of stator teeth disposed on the yoke at intervals; providing a second core element; Winding the first winding unit to form a first core element, the second core element being located at an outer periphery of the first core element; the second core element is secured to the yoke portion of the first core element.
  11. 11. A method of manufacturing a stator core, the method comprising the steps of: Providing a first core element comprising a yoke and a plurality of stator teeth disposed on the yoke at intervals; providing a second film winding unit; Winding the second winding unit to form a second core element, the second core element being located at an outer periphery of the first core element; the second core element is secured to the yoke portion of the first core element.
  12. 12. A method of manufacturing a stator core, the method comprising the steps of: Providing a first film roll unit comprising a yoke and a plurality of stator teeth disposed on the yoke at intervals; providing a second film winding unit; the first winding unit and the second winding unit are synchronously wound to form a first core element and a second core element, respectively, the second core element being located at the outer periphery of the first core element.

Description

Stator core, motor, and method for manufacturing stator core Technical Field The invention relates to the technical field of motors, in particular to a stator core, a motor and a manufacturing method of the stator core. Background With the vigorous development of the new energy automobile industry, the higher the requirements on the motor are, the higher the motor performance is, and the manufacturing cost is reduced. In order to cope with these demands, there is a current technology of installing a stator core manufactured through a winding process in a motor to improve motor efficiency. And the stator core manufactured by adopting the winding process can improve the utilization rate of the core material and further reduce the manufacturing cost of the motor. However, because of the limited ductility of the thin silicon steel strip used for manufacturing the stator core, the yoke portion of the existing wound stator core cannot be too thick, and the coil stator core can only be applied to motors with more poles, namely, motors with more magnetic poles or windings. If the yoke of the conventional wound stator core is thickened and wound, the outer side of the thin silicon steel strip is easily torn and the inner side of the thin silicon steel strip is easily convex-packed in the winding process of the thin silicon steel strip. Disclosure of Invention The invention mainly aims to provide a stator core, a motor and a manufacturing method of the stator core, and aims to solve the problems that an existing stator core with a thicker yoke part is easy to tear and bulge during winding. In order to achieve the above object, the present invention provides a stator core comprising: A first core element having a yoke portion, and The second iron core element is independent of the first iron core element, the first iron core element and/or the second iron core element are of a spiral structure, the second iron core element is located on the periphery of the first iron core element, and the second iron core element is fixed with the yoke portion to form a stator yoke. In an embodiment, the stator core further comprises a filler filled between the yoke portion and the second core element to fix the second core element to the yoke portion and form a stator yoke. In one embodiment, the filler is made of a resin material. In one embodiment, the first core element has a plurality of stator teeth thereon, and stator slots are formed between adjacent stator teeth and the yoke. In an embodiment, the stator core further comprises stator teeth cooperating with the first core element, stator slots being formed between adjacent stator teeth and the yoke. In one embodiment, the difference between the outer radius of the stator yoke and the inner radius of the stator yoke is the thickness of the stator yoke, the thickness of the stator yoke being greater than or equal to 10mm. The invention also provides a motor, which comprises a shell and a stator core, wherein the shell is connected with the stator core, and is provided with a liquid inlet and a liquid outlet. In one embodiment, the second core element is provided with a cooling channel, which is in communication with the liquid inlet and the liquid outlet. In an embodiment, a cooling groove is formed in the periphery of the second iron core element, the casing is connected with the second iron core element, the cooling groove forms a cooling channel, and the cooling channel is communicated with the liquid inlet and the liquid outlet. The invention also provides a manufacturing method of the stator core, which comprises the following steps: Providing a first film roll unit comprising a yoke and a plurality of stator teeth disposed on the yoke at intervals; providing a second core element; Winding the first winding unit to form a first core element, the second core element being located at an outer periphery of the first core element; the second core element is secured to the yoke portion of the first core element. The invention also provides a manufacturing method of the stator core, which comprises the following steps: Providing a first core element comprising a yoke and a plurality of stator teeth disposed on the yoke at intervals; providing a second film winding unit; Winding the second winding unit to form a second core element, the second core element being located at an outer periphery of the first core element; the second core element is secured to the yoke portion of the first core element. The invention also provides a manufacturing method of the stator core, which comprises the following steps: Providing a first film roll unit comprising a yoke and a plurality of stator teeth disposed on the yoke at intervals; providing a second film winding unit; the first winding unit and the second winding unit are synchronously wound to form a first core element and a second core element, respectively, the second core element being located at the outer periphery of the first core el