Double-acting electromagnetic actuator

An electromagnetic actuator and moving coil technology, applied in the direction of electromagnet, movable winding electromagnet, electromagnet with armature, etc., can solve the problem of response drop and achieve high reliability
CN1159736CInactive Publication Date: 2004-07-28SWEDISH CONRTOL SYST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SWEDISH CONRTOL SYST
Publication Date
2004-07-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to an electromagnetic actuator for a rapid linear motion with a limited length of stroke. The electromagnetic actuator includes a stationary arranged first coil (1,6) and a second movable coil (2), with the winding of the stationary coil connected to controllable power source (7) and the winding of the movable coil is short-circuited without any galvanic connection to an external power source. The ends of the winding of the movable coil of the electromagnetic actuator is short-circuited via a rectifier element (9), preferably a diode. The diode allows a current to be developed in one direction only in the winding of the second coil, said current being induced from an electromagnetic field generated by a current through the first coil. In this manner is a double-acting electromagnetic actuator with very low weight obtained, resulting in very rapid response and high reliability, due to the lack of any external electrical connections to the movable coil.
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Description

technical field

[0001] The present invention relates to an electromagnetic actuator, and more particularly to an electromagnetic actuator with a moderate length of stroke having fast linear motion. Background technique

[0002] It has long been known that coils are movable under the influence of a magnetic field. Examples of this can be found in loudspeakers with fixed permanent magnets, which have a movable voice coil encased in a magnetic field induced by the permanent magnets. The windings of the voice coil are connected to an external power source and, through current control, can give the coil the desired motion. The disadvantage of this solution is that the external connections are movable and subject to potential interruption.

[0003] In United States patent US.A.5294850 a device is disclosed in which the electromagnetic field effect is capable of launching a missile. In this scheme fixed coils are used, capable of influencing coils placed ...

Claims

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