公开(公告)号：US09154013B2

公开(公告)日：2015-10-06

申请号：US13786024

申请日：2013-03-05

Applicant: Johnson Electric S.A.

Inventor： James Ching Sik Lau ,  Xiao Jun Yang ,  Cheong Wing Yuen ,  Yu Ying Li ,  Yang Qing Hou

IPC: H02K5/18 ,  H02K5/12 ,  H02K5/08 ,  H02K9/22

CPC classification number: H02K5/18 ,  H02K5/08 ,  H02K9/22

Abstract: An electric motor has a stator, a shaft and a rotor. The stator has an annular yoke portion; a plurality of stator teeth inwardly extending from the yoke portion; stator windings wound on the stator teeth; and a molded member made of heat conductive plastic material. The molded member has a plurality of fins arranged on an outer wall of the yoke portion, a covering portion disposed in the spaces between adjacent stator teeth, and two connecting portions respectively located at axially outer end faces of the yoke portion and connected to the covering portion and the fins. The covering portion covers an inner wall of the yoke portion and the stator windings, and connects to the fins via the connecting portions. Heat generated by the stator windings is transmitted to the fins via the covering portion and the connecting portions, where it is dissipated.

Abstract translation: 电动机具有定子，轴和转子。 定子具有环形轭部; 从轭部向内延伸的多个定子齿; 定子绕组缠绕在定子齿上; 以及由导热塑料材料制成的模制件。 模制构件具有设置在轭部的外壁上的多个翅片，设置在相邻的定子齿之间的空间中的覆盖部分和分别位于轭部的轴向外端面处并连接到覆盖物的两个连接部分 部分和翅片。 覆盖部分覆盖磁轭部分的内壁和定子绕组，并且经由连接部分连接到散热片。 由定子绕组产生的热量经由覆盖部分和连接部分被传递到翅片，在那里它被消散。