公开(公告)号：DE10084652B4

公开(公告)日：2009-10-01

申请号：DE10084652

申请日：2000-05-19

Applicant: PANASONIC CORP

Inventor： ASANO YOSHINARI ,  SAWAHATA TAKAO ,  HONDA YUKIO ,  KURAHAYASHI TAKAHISA ,  TAMAMURA TOSHIYUKI ,  KIRIYAMA HIROYUKI

IPC: H02K1/06 ,  H02K21/02 ,  H02K1/08 ,  H02K1/14 ,  H02K1/18 ,  H02K21/14 ,  H02K29/03

Abstract: A motor has a stator having a plurality of teeth for receiving windings, a yoke connected to each tooth, and a rotor having permanent magnets facing the stator. An inner wall surface of each tooth faces the rotor with an air-gap therebetween. Each tooth is separated from an adjacent tooth by a slot-open-section extending between a tailing end of the tooth and a leading end of the adjacent tooth. The inner wall surface of each tooth has an arc extending from a center of the slot-open-section toward the tailing end. The air-gap at the tailing end of each tooth is greater than the air-gap at the leading end of each tooth. The inner wall surface of each tooth includes a straight-line tailing section extending from the center of the slot-open-section toward the leading end. The straight-line tailing section extends tangentially from the arc.