Title: Electromagnetic actuator
Application Number: 85102911 Application Date: 1985.04.18
Publication Number: 1001065 Publication Date: 1986.06.10
Approval Pub. Date: 1989.11.29 Granted Pub. Date: 1989.11.29
International Classifi-cation: H01F7/16
Applicant(s) Name: Mitsubishi Mining Address:
Inventor(s) Name: Tokio Uetsuhara
Attorney & Agent: LI XIANGMIN
Abstract:
    An electromagnetic actuator comprises a casing mainly consisting of a stationary iron core or a combination of a stationary iron core and a yoke, the casing being formed with at least one of opening; one or a pair of movable iron core as an actuating member, capable of reciprocally moving through the opening of the casing; an electric winding element arranged in the casing for applying a first magnetomotive force to the movable iron core when an electric current is flowed through the winding element; a permanent magnet being so arranged in the casing as to apply the second magnetomotive force to the movable iron core; and a bias force generating means for applying a mechanical force or the first magnetomotive force to the movable iron core. The movable iron core can reciprocally move from one state to the other state since the magnetomotive force is larger than the offset force. The electromagnetic actuator can be operated by an electric source with small power.
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