公开(公告)号：EP1553678A4

公开(公告)日：2007-05-02

申请号：EP03788130

申请日：2003-08-15

申请人： YAMAHA MOTOR CO LTD

发明人： NAITO SHINYA ,  HINO HARUYOSHI ,  ISHIHARA HIROYUKI ,  TERADA JUNJI ,  ONO TOMOHIRO ,  NISHIYAMA MOTOKUNI ,  KAWASAKI MASASHI

IPC分类号： H02K1/27 ,  H02K21/12 ,  H02K37/00

CPC分类号： H02K1/2793 ,  B60G2204/30 ,  B60L11/1805 ,  B60L11/1877 ,  B60L15/20 ,  B60L2200/12 ,  B60L2220/44 ,  B60L2240/421 ,  B60L2240/423 ,  B60L2270/142 ,  B60L2270/145 ,  Y02T10/641 ,  Y02T10/645 ,  Y02T10/7005 ,  Y02T10/705 ,  Y02T10/72 ,  Y02T10/7275

摘要： An excitation voltage waveform is allowed to approach a sine-waveform when a rotor is rotated to change over the magnetic pole of a magnet facing each tooth. Provided are a plurality of magnetic pole units (45a and 45b) arranged in an almost circular shape to face a plurality of teeth (61) being disposed in an almost circular shape along a rotation axis direction (BO) and across a gap, and a plurality of inter-magnetic-pole units (45c) that extend in a peripheral direction from respective adjacent magnetic pole units in the magnetic pole units (45a and 45b) and have teeth facing surfaces recessed along the rotation axis direction (BO) below surfaces facing the teeth (61) of the magnetic pole units (45a and 45b), the plurality of magnetic pole units (45a, 45b) and the plurality of inter-magnetic-pole units (45c) being formed in one piece.