Burn-out preventive circuit for commutatorless motor

Details Burn-out preventive circuit for commutatorless motor Burn-out preventive circuit for commutatorless motor

1984-05-21

1986-03-25

Shoop, Jr., William M.

Electricity: motive power systems

Switched reluctance motor commutation control

318138, 318439, H02P 602

Patent

active

045786232

ABSTRACT:
A burn-out preventive circuit for a commutatorless motor comprises drive windings of two phases, driving power transistors connected in series with the drive windings respectively, a position detecting element detecting the angular position of rotation of a permanent magnet rotor for alternately turning on the driving power transistors, and a protective circuit detecting a counter-electromotive force induced in the drive windings during rotation of the permanent magnet rotor for interrupting energization of the drive windings when the detected counter-electromotive force is lower than a predetermined level or zero.

REFERENCES:
patent: 4030005 (1977-06-01), Doemen
patent: 4169990 (1979-10-01), Lerdman

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