公开(公告)号：US11705766B2

公开(公告)日：2023-07-18

申请号：US17024652

申请日：2020-09-17

Applicant: HL MANDO CORPORATION

Inventor： Mazharul Chowdhury ,  Md Sariful Islam ,  Mohammad Islam ,  Abraham Tesfamicael

IPC: H02K1/27 ,  H02K1/16 ,  H02K1/276

CPC classification number: H02K1/276 ,  H02K1/165

Abstract: A permanent magnet motor comprises: a stator comprising teeth; and a rotor rotatable relative to the stator, the rotor having a plurality of poles, wherein each pole of the rotor comprises a pair of magnet retention slots, each magnet retention slot accommodating a magnet. Surfaces of the teeth of the stator facing the rotor are flat or have an arc shape. Each magnet retention slot may have a plurality of angled slot surfaces forming a first barrier around a corner of the magnet positioned closest to an outer surface of the rotor. At least three second barriers are positioned around a mid-axis extending along between the pair of the magnet retention slots. Each magnet retention slot comprises a slot surface slanted or curved relative to a second side surface of the magnet facing an inner surface of the rotor to form a third barrier around an end of the second side surface of the magnet.