Variable reluctance actuator having position sensing and control

Details Variable reluctance actuator having position sensing and control Variable reluctance actuator having position sensing and control

1984-08-09

1987-04-21

Duggan, Donovan F.

Electricity: motive power systems

Reciprocating or oscillating motor

Energizing winding circuit control

361154, 310 30, H02K 3300

Patent

active

046599690

ABSTRACT:
A controlled force variable reluctance actuator. A variable reluctance actuator having a moving element operated by a solenoid is provided in which the current in the solenoid is controlled by a signal representative of the flux density in the magnetic circuit of the actuator. The signal is produced by a Hall effect device placed in the magnetic circuit. Preferably, the Hall effect device controls the current in the solenoid by controlling its duty cycle; however, continuous control of the current may also be employed. Alternative embodiments are provided for a constant force actuator, an actuator whose force-displacement characteristic is altered, and an actuator in which the force may be selectively controlled. An embodiment is also provided for selectively controlling the position of the moving element based upon measured electric and magnetic parameters of the actuator.

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