公开(公告)号：US20230024138A1

公开(公告)日：2023-01-26

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: H02K21/16 ,  H02K1/276

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.