公开(公告)号：US11670996B2

公开(公告)日：2023-06-06

申请号：US17374307

申请日：2021-07-13

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

Inventor： Kaihe Zhang ,  Liangliang Zhang ,  Longyu Ju

IPC: H02K29/03 ,  H02K1/276

CPC classification number: H02K29/03 ,  H02K1/276 ,  H02K2201/06 ,  H02K2213/03

Abstract: A rotor core is provided for a step-skewing motor that includes rotor core segments mutually staggered by a preset angle. Each of the rotor core segments includes magnet slots along a circumferential direction, with a magnet provided in the magnet slot. An outer circular surface of each of the rotor core segments is provided thereon with a number of auxiliary grooves extending across the segment in an axial direction, and positions and/or cross-sectional shapes of the auxiliary grooves on the rotor core segments are not completely same so as to suppress torque ripple and vibration noise when the motor rotates.