Motor drive

Details Motor drive Motor drive

1979-10-26

1981-10-27

Smith, Jr., David

Electricity: motive power systems

Switched reluctance motor commutation control

318138, H02K 2902

Patent

active

042976227

ABSTRACT:
A gyro motor drive speed control system using reference coils in place of turable reactors for motor start up and spin direction. An oscillator provides a 1 H.sub.z squarewave signal to rotate the motor magnet in some direction, and movement of the magnet causes a magnetic field disturbance which induces a current into the reference coils. The signals from the reference coils are fed back into the oscillator and through a phase shifting and squaring network, with one reference signal shifted 90.degree. out of phase. The multiplied output signals are fed into a circuit for motor drive and speed control. If the magnet begins to spin in the wrong direction, the quadratured lead-lag signals will be reversed, acting against the magnet, causing it to stop and reverse direction.

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patent: 3617841 (1971-11-01), Brailsford
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patent: 3999108 (1976-12-01), Tanikoshi
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patent: 4065706 (1977-12-01), Gosling et al.
patent: 4131828 (1978-12-01), Houshi

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