| 摘要 |
<p>An electromagnetic actuator comprising: a container which chiefly consists of a fixed core (1) or a combination of the fixed core (1) and a yoke (1b), and which has at least one or more openings; one or more moving cores (2) which work as operation members, and which undergo reciprocal motion passing through said openings; an electric winding (4) which is provided in said container so as to exert a first magnetomotive force on said moving cores (2) when an electric current is supplied thereto; a permanent magnet (5) which is provided in said container so as to exert a second magnetomotive force on said moving cores (2) in parallel with said first magnetomotive force; and means for generating reaction by applying a mechanical force or said first magnetomotive force onto said moving cores (2); wherein the permanent magnet (5) is provided in said container so as to exert the second magnetomotive force on said moving cores (2) in parallel with said first magnetomotive force, so that a large thrust is produced with a very small electric current. The electromagnetic actuator can be used for electromagnetic valves and the like.</p> |
