Title:
ELECTROMAGNETIC ACTUATOR
Document Type and Number:
WIPO Patent Application WO/2022/201373
Kind Code:
A1
Abstract:
This electromagnetic actuator comprises: a cylindrical coil (5); a movable core (3) that is disposed circumferentially inward of the coil, projects in the direction of one end of the coil, and is freely movable along the central axis direction of the coil; a fixed core (1) that is disposed on another end side of the coil; a magnetic yoke (2) that is disposed so as to surround the outer periphery of the coil and that makes contact with the fixed core on the inner side; a drive spring (6) that imparts a spring force to the movable core in one direction; and a permanent magnet (4) that generates a magnetic flux for adsorbing the movable core to the fixed core. The fixed core includes a first narrow path portion one end direction of which is narrower than the width in one end direction at a site where the fixed core and the yoke make contact with each other, and during a release operation when the movable core and the fixed become separated, a branch flow magnetic path is generated that passes through the yoke, by way of the first narrow path portion, from the permanent magnet.
Inventors:
KAMINO YASUHIRO (JP)
WATANABE SHINYA (JP)
WATANABE SHINYA (JP)
Application Number:
PCT/JP2021/012335
Publication Date:
September 29, 2022
Filing Date:
March 24, 2021
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H01H50/36; H01H50/42; H01H51/22
Domestic Patent References:
| WO2011033654A1 | 2011-03-24 |
Foreign References:
| JPS61128436A | 1986-06-16 | |||
| JPS49126531U | 1974-10-30 |
Attorney, Agent or Firm:
MURAKAMI, Kanako et al. (JP)
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