公开(公告)号：US20210111598A1

公开(公告)日：2021-04-15

申请号：US17017800

申请日：2020-09-11

Applicant: Jing-Jin Electric Technologies Co., Ltd.

Inventor： Ping Yu ,  Yixue Su ,  Yi Cheng ,  Haibin Wang ,  Baojiang Li

IPC: H02K1/18 ,  H02K5/24

Abstract: The present disclosure discloses an electric-machine stator lamination, an electric-machine stator iron core and an electric machine, which effectively solves the technical problem in the prior art that electric machines have high NVHs. The yoke of the electric-machine stator lamination is circumferentially provided with a plurality of axial tunnels, and the tunnels are empty or are filled with a damping medium. The electric-machine stator iron core is formed by laminating a plurality of the electric-machine stator laminations or is integrally manufactured. The electric machine includes an electric-machine housing and the electric-machine stator iron core, the outer circumference of the electric-machine stator iron core and an inner wall of the electric-machine housing have gaps therebetween, and the gaps are empty or are filled with a damping medium. The structures in which the gaps/tunnels are empty or the gaps/tunnels are filled with a damping medium can weaken the vibration energy generated by the stator to the electric-machine housing, increasing the damping coefficient of the electric-machine housing, reduces the response amplitude/frequency of the electric-machine housing, weaken the paths of the vibration/noise transmission, and reduce the response amplitudes, thereby inhibiting vibration and noise, to effectively reduce the overall NVH level.