公开(公告)号：US20210384801A1

公开(公告)日：2021-12-09

申请号：US17411358

申请日：2021-08-25

Applicant: LG Electronics Inc.

Inventor： Jinsu OH ,  Jiwon LEE

IPC: H02K9/193 ,  H02K1/27 ,  H02K5/20 ,  H02K5/18

Abstract: An electric motor includes a rotor including a rotary shaft defining a first fluid channel configured to carry a cooling fluid, a rotor core including a plurality of permanent magnets and defining a second fluid channel in communication with the first fluid channel, and end rings mounted on opposite end portions of the rotor core. Each end ring includes injection holes in fluid communication with the second fluid channel and configured to inject the cooling fluid. Each end ring includes a plurality of rotary pins that are circumferentially arranged on an outer surface of the end ring, that are spaced apart from one another, and that are configured to circulate the cooling fluid injected through the plurality of injection holes into the first fluid channel.