ELECTROMAGNETIC ACTUATOR IN PARTICULAR INTENDED TO DRIVE A TURBOCOMPRESSOR RELIEF VALVE

摘要

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.

主权项

1. An electromagnetic actuator intended in particular to drive a relief valve for a turbo-compressor, with said actuator comprising a fixed element formed by a first magnetic stator circuit made of a material with a high magnetic permeability excited by at least one excitation coil, and a moving member made of a thin part, with said magnetised thin part being alongside a second magnetic circuit made of a material with a high magnetic permeability, with said moving member being provided with a coupling axle, with said fixed and moving members being attracted against one another under the combined magnetic effect of the magnetised part and the excitation coil, said fixed member and the moving member being connected by a frictional mechanical connector of a pure sliding type, in that said connector is a system, directly incorporated in the actuator, for the mechanical damping of the external disturbances applied to the valve, and said connector has a frictional mechanical characteristic of a stick-slip type depending on the relative position of said moving and fixed members and on the current flowing in the coil.