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1. 发明授权

US4855701A Polarized electromagnet 失效
标题翻译：极化电磁铁
公开(公告)号：US4855701A
公开(公告)日：1989-08-08
申请号：US267219
申请日：1988-11-03
申请人： Yoichi Yokoyama , Hiroaki Hamaguchi , Kideya Kondo , Youichi Kunimoto , Manabu Yano
发明人： Yoichi Yokoyama , Hiroaki Hamaguchi , Kideya Kondo , Youichi Kunimoto , Manabu Yano
IPC分类号： H01H51/22 , H01H89/10
CPC分类号： H01H89/10 , H01H51/2209
摘要： A polarized electromagnet with improved response sensitivity includes an axially movable core 63 extending through an excitation coil 61 to be movable between two positions upon energization and deenergization of the coil 61. The core 63 is formed at its opposite ends respectively with pole plates 69 extending transversely of the core axis. Inner and outer yokes 64 and 65 are arranged in parallel to the core 63 and are magnetized to the opposite polarities by a permanent magnet 65. Inner and outer yokes 64 and 65 have at respective ends inner and outer pole ends 67 and 68 which are spaced axially to each other so as to form therebetween magnetic gaps in each of which the adjacent one of the pole plates 69 is located. At least one of the inner pole ends 67 terminates in a pole tip which is positioned transversely outwardly of the adjacent pole plate 69 and extends in the axial direction to a point where it overlies the adjacent pole plate 69 when the latter is magnetically attracted to the pole tip 67 such that the inward face of the pole tip 67 comes into direct facing relation to the lateral edge of the adjacent pole plate 69 when the pole plate 69 is attracted to the pole tip 67. Accordingly, it is possible to reduce the physical gap or the magnetic resistance between the pole tip 67 and the adjacent pole plate 69 in the position away from the pole tip 67 without reducing the stroke of the core in the axial direction.
摘要翻译：具有改善的响应灵敏度的极化电磁体包括延伸穿过励磁线圈61的可轴向移动的铁芯63，以在线圈61通电和断电时在两个位置之间移动。芯部63在其相对端分别形成有横向延伸的极板69 的核心轴。内轭铁64和外轭铁65与铁芯63平行地配置，并通过永久磁铁65被磁化成相反的极性。内轭铁64和外轭铁65在相应的端部分别位于内和外极端部67和68之间，彼此轴向地形成在相邻的极板69所位于的每个中的磁隙之间。内极端部67中的至少一个终止于极尖，该极尖位于相邻的极板69的横向外侧，并且在轴向方向上延伸到其相邻极板69上的位置，当磁体尖端69被磁吸引到极尖67使得当极板69被吸引到极尖67时，极尖67的内表面与相邻极板69的侧边缘直接面对。因此，可以减少物理间隙或磁极端头67和相邻极板69之间的磁阻在远离极尖端67的位置，而不会减小芯轴在轴向上的行程。

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