公开(公告)号：US20220255380A1

公开(公告)日：2022-08-11

申请号：US17608761

申请日：2020-04-16

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： NAOTO MIYAWAKI ,  TAKERU MAEKAWA ,  YASUSHI KAMADA

IPC: H02K1/28 ,  H02K1/278

Abstract: A rotor includes: a shaft; a rotor back yoke having a through hole defined in an axial center through which the shaft is inserted, the rotor back yoke being integrally and rotatably connected to the shaft; and magnets fixed to an outer peripheral surface of the rotor back yoke, the plurality of magnets being disposed with magnetic poles of different polarities being arranged alternately along a circumferential direction. The rotor back yoke includes a plurality of first cutout portions provided at predetermined intervals in the circumferential direction and extending from an inner peripheral surface of the rotor back yoke outward in a radial direction. Each of the plurality of first cutout portions extends along an axial direction, from one end surface to the other end surface of the rotor back yoke.