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Title:
DC-OPERATED POLARIZED ELECTROMAGNET AND ELECTROMAGNETIC CONTACTOR USING SAME
Document Type and Number:
WIPO Patent Application WO/2015/177957
Kind Code:
A1
Abstract:
This invention provides a DC-operated polarized electromagnet in which the magnetic flux density between a plunger and an outer yoke is made uniform, improving the efficiency of the electromagnet. This invention also provides an electromagnetic contactor using said DC-operated polarized electromagnet. This DC-operated polarized electromagnet contains a plunger (21) to which armatures (23, 24) for a spool (11) that has a central opening (12) around which an excitation coil (16) is wound are attached individually, an outer yoke (31) that encloses opposing side surfaces of the spool so as to attract the first armature (23), an inner yoke (41) that is laid out inside the outer yoke so as to attract the second armature (24), and a permanent magnet (51) positioned between the outer yoke and the inner yoke. The outer yoke (31) is made thicker than the inner yoke (41), reducing magnetoresistance and dispersing concentrated magnetic flux in the plunger (21) to the outer yoke (31).

Inventors:
TSUTSUMI TAKASHI (JP)
WATANABE MASAAKI (JP)
DAIJIMA HIDEKI (JP)
SHIINOKI SHOTA (JP)
Application Number:
PCT/JP2015/001945
Publication Date:
November 26, 2015
Filing Date:
April 07, 2015
Export Citation:
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Assignee:
FUJI ELEC FA COMPONENTS & SYS (JP)
International Classes:
H01H50/36; H01F7/122; H01F7/16
Foreign References:
JP2011044278A2011-03-03
JP2011044279A2011-03-03
JP2012195301A2012-10-11
Attorney, Agent or Firm:
HIROSE, Hajime et al. (JP)
Hirose 1 (JP)
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