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2. 发明授权

US07560841B2 Thin hybrid magnetization type ring magnet, yoke-equipped thin hybrid magnetization type ring magnet, and brush-less motor 有权
标题翻译：薄型混合磁化型环形磁铁，轭铁型混合磁化型环形磁铁，无刷电动机
公开(公告)号：US07560841B2
公开(公告)日：2009-07-14
申请号：US10545428
申请日：2004-07-22
申请人： Yoshinobu Honkura , Hiroshi Matsuoka , Daisuke Nagaya
发明人： Yoshinobu Honkura , Hiroshi Matsuoka , Daisuke Nagaya
IPC分类号： H02K21/12
CPC分类号： H01F7/0273 , H01F13/003 , H01F41/028 , H02K1/2733 , H02K29/03
摘要： The present invention provides miniaturization of brushless motors and brush motors used in electric devices, a ring magnet which simultaneously achieves both high torque and a reduction in cogging torque, a ring magnet with yoke, and a brushless motor. The thin hybrid magnetized ring magnet of the present invention is structured of, in a ring magnet comprised of a plurality of magnetic poles, a radially magnetized main pole and an interface for which the interface of the adjoining main pole is polar anisotropic. When the thin hybrid magnetized ring magnet structured in this manner is applied to a brushless motor, in the case of radial magnetizing, the abrupt change in magnetic flux of the interface between the magnetic poles becomes smooth and cogging torque is greatly reduced due to polar anisotropic magnetization of the interface. At the same time, by polar anisotropically magnetizing the interface between the magnetic poles, magnetic flux is concentrated on the radially magnetized main pole, and in comparison to only radial magnetization, maximum surface magnetic flux improves and it is possible to attain high torque.
摘要翻译：本发明提供了电气设备中使用的无刷电动机和电刷电动机的小型化，同时实现高转矩和齿槽转矩减小的环形磁铁，具有磁轭的环形磁体和无刷电动机的小型化。本发明的薄型混合磁化环形磁体由在多个磁极构成的环形磁体中构成，其具有径向磁化的主极和相邻主极的界面极性各向异性的界面。当以这种方式构造的薄混合磁化环形磁体施加到无刷电动机时，在径向磁化的情况下，磁极之间的界面的磁通量的突然变化变得平滑，并且由于极性各向异性而使齿槽转矩大大降低界面的磁化。同时，通过极地各向异性地磁化磁极之间的界面，磁通集中在径向磁化的主极上，与仅径向磁化相比，最大表面磁通量提高，并且可以获得高扭矩。

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