公开(公告)号：US20030057799A1

公开(公告)日：2003-03-27

申请号：US10245806

申请日：2002-09-17

申请人： Japan Servo Co., Ltd.

发明人： Shoji Ohiwa ,  Kazuo Ohnishi ,  Yoichi Nagata ,  Junichi Ikeda ,  Tomokazu Uchiyama ,  Kouji Yoneda ,  Hideo Saito ,  Masahiro Mimura

IPC分类号： H02K001/12

CPC分类号： H02K29/08 ,  H02K11/33 ,  H02K21/227 ,  Y10S310/06

摘要： A brushless DC motor wherein a rotor has a motor shaft, a rotor yoke mounted on the motor shaft, and a ring-shaped magnet magnetized so as to have a plurality of magnet poles in the circumferential direction thereof, and held by the rotor yoke. A stator has first and second stator yokes each having main magnetic poles extending in the radial direction from the center thereof, magnetic pole pieces extending in the vertical direction from tip ends of the main magnetic poles along an inner peripheral surface of the ring-shaped magnet, a center yoke surrounding the motor shaft for connecting magnetically said first and second stator yokes, a winding assembly having an annular winding, and a printed wiring board, on which the annular winding, a electromagnetic conversion element and a driving circuit are mounted.

摘要翻译： 1.一种无刷直流电动机，其特征在于，转子具有电动机轴，安装在电动机轴上的转子轭，以及在其圆周方向上具有多个磁极的磁性的环状磁体，并由转子轭保持。 定子具有第一和第二定子轭，它们各自具有从其中心沿径向方向延伸的主磁极，磁极片沿着主磁极的尖端沿着垂直方向从环形磁体的内周面延伸 围绕电动机轴的中心磁轭，用于磁性地连接所述第一和第二定子磁轭，具有环形绕组的绕组组件和印刷电路板，环形绕组，电磁转换元件和驱动电路安装在该电路板上。