Importance

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Abstract

An electromagnetic actuator is intended in particular to drive a relief valve for a turbo-compressor, the actuator including a fixed member formed by a first magnetic stator circuit made from a material with high magnetic permeability excited by at least one excitation coil, and a moving member made up of a thin part, the magnetised thin part being alongside a second magnetic circuit made from a material with a high magnetic permeability, the moving member being provided with a coupling axle, the fixed and moving members being attracted against one another under the combined magnetic effect of the magnetised part and the excitation coil, the fixed member and the moving member being connected by a mechanical connector with friction of the pure sliding type, the connector being a system, directly incorporated into the actuator, for mechanical damping of the outside disturbances applied to the valve, and the connector having a mechanical friction characteristic of the glued-sliding type dependent on the relative position of the moving and fixed members and on the current flowing in the coil.

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First Claim