Electromagnetic actuator for active vibration isolation system
AssigneeKeihin Corporation
InventorKen Motohashi
Life of this patent
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Abstract
An electromagnetic actuator for an active vibration isolation system, the electromagnetic actuator includes: a fixed core; a movable core that is opposed to the fixed core and is joined to a vibration member; and a coil unit having coils that surround part of the fixed core and the movable core. The movable core and the vibration member are vibrated in a reciprocating manner by energization to the coils, and the coils include a main coil to which an alternating current with a waveform corresponding to vibrations of a vibration generation source is input and a sub-coil that amplifies magnetic flux generated by the main coil.
Claims5
An electromagnetic actuator for an active vibration isolation system, the electromagnetic actuator comprising:
- a vibration member having an axial direction and coupled to a vibration generation source;
- a fixed core arranged along the axial direction;
- a movable core arranged along the axial direction and is movable relative to the fixed core along the axial direction, the movable core being couple to the vibration member;
- and
- a coil unit that surrounds part of the fixed core and the movable core and is configured to cause the movable core and the vibration member to vibrate in a reciprocating manner, the coil unit comprising:
- a main coil that is energized by an alternating current with a waveform corresponding to vibrations of the vibration generation source to generate a magnetic flux to vibrate the movable core and the vibration member in a manner that suppresses the vibrations;
- and
- a sub-coil that is energized by a direct current and configured to amplify the magnetic flux generated by the main coil.
Dependencies are inferred from the claim text.