Control circuit for variable reluctance motor

Details Control circuit for variable reluctance motor Control circuit for variable reluctance motor

1974-12-19

1976-09-14

Rubinson, Gene Z.

Electricity: motive power systems

Reciprocating or oscillating motor

Energizing winding circuit control

318166, 318331, H02K 2900

Patent

active

039809331

ABSTRACT:
A control circuit for a variable reluctance motor. A solid state switching device has its output circuit connected in series with the electrical winding of the motor. Circuit means are coupled to the motor winding and to the control electrode of the solid state switching device. The circuit means senses the EMF induced in the motor winding while the motor is rotating and while the switching device output is nonconductive. The switching device output circuit is rendered conductive when the EMF attains a predetermined level. The EMF induced in the winding of the rotating motor results from residual magnetism in the magnetic circuit of the motor or from such residual magnetism in addition to a bias current supplied to the motor winding. The variable reluctance motor acts as its own position sensor.

REFERENCES:
patent: 3304481 (1967-02-01), Saussele
patent: 3611081 (1971-10-01), Watson
patent: 3775648 (1973-11-01), Brown et al.
patent: 3906320 (1975-09-01), Doemen

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