发明授权
- 专利标题: Linear motor and linear compressor
- 专利标题(中): 直线电机和线性压缩机
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申请号: US09245408申请日: 1999-02-05
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公开(公告)号: US06184597B2公开(公告)日: 2001-02-06
- 发明人: Hideo Yamamoto , Koyo Shibuya , Koji Hamaoka
- 申请人: Hideo Yamamoto , Koyo Shibuya , Koji Hamaoka
- 优先权: JP10-118358 19980428; JP10-286228 19981008; JP10-286260 19981008
- 主分类号: H02H4100
- IPC分类号: H02H4100
摘要:
A linear motor comprising prismatic inner yokes each constructed in a manner that a large number of sheets each having a generally rectangular configuration and having a high magnetic permeability are piled up each other and outer yokes each constructed in a manner that a number of sheets each having a generally rectangular configuration and having a high magnetic permeability are piled up each other. Each of coils is wound around a central portion of three magnetic pole portions of the outer yoke to alternately establish different magnetic poles along a direction of an axis of the linear motor. A surface of the outer yoke, holding the magnetic pole portions, is disposed in an opposed relation to the inner yoke to define a predetermined gap therebetween so that the inner yoke and the outer yoke form each of a plurality of yoke blocks. The yoke blocks are placed around the axis so that the sheet piling-up direction is perpendicular to a diametrical direction of a shaft. In addition, a moving element having a pair of permanent magnets magnetized radially so that their magnetizing directions are opposite to each other is movably located between the inner yoke and the outer yoke at a predetermined interval along the axis. This construction improves the motor efficiency and facilitates the manufacturing of the motor.