公开(公告)号：US12107470B2

公开(公告)日：2024-10-01

申请号：US17786626

申请日：2020-12-15

Applicant: Hitachi Astemo, Ltd.

Inventor： Kazutami Tago ,  Itsuki Shimura ,  Junnosuke Nakatsugawa ,  Wataru Yokoyama ,  Ippei Suzuki

IPC: H02K1/27 ,  H02K1/276 ,  H02K1/28 ,  H02K21/16 ,  H02K7/00

CPC classification number: H02K21/16 ,  H02K1/276 ,  H02K7/006 ,  H02K2213/03

Abstract: A rotary electric machine includes a stator including a coil, and a rotor in an inner peripheral side of the stator. The rotor core comprises a soft magnetic metal and a magnet within a magnet insertion hole, a first magnet stopper on a q axis side of the magnet in the magnet insertion hole, a magnet accommodation between the first magnet stopper on both sides of the magnet insertion hole, a first space portion communicating with the magnet insertion hole, a second space portion whose distance from the magnet is equal to or less than a thickness of the magnet and a radial length of a magnetic pole center is long, the second space portion formed on an inner peripheral side relative to the magnet, and a third space portion that has a convex shape on an inner peripheral side of a q axis of the magnet.