Title:
FORCE MOTOR WITH INCREASED PROPORTIONAL STROKE
Document Type and Number:
WIPO Patent Application WO2003102979
Kind Code:
B1
Abstract:
The force motor (10) of the present invention controls the local magnetic field through a designed mechanical structure of the internal components. The mechanical structure divides the magnetic field in the force motor (10) into three sections. The force produced on the armature (18) by the magnetic field in the first section increases exponentially as the armature (18) approaches the housing (26). The force produced on the armature (18) by the magnetic field in the second and the third sections, as the armature (18) approaches the housing (26), counter balances the rise in the force due to the magnetic field in the first section. Thus, a flat F-S curve over a long stroke length is obtained.
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| JPS5846413 | 【考案の名称】有極電磁石 |
Inventors:
XU YAO-HUI (US)
Application Number:
PCT/US2003/016813
Publication Date:
July 22, 2004
Filing Date:
May 30, 2003
Export Citation:
Assignee:
MINEBEA CO LTD (JP)
XU YAO-HUI (US)
XU YAO-HUI (US)
International Classes:
H01F7/14; H01F7/16; H02K33/02; (IPC1-7): H01F7/08
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