Control circuit for a brushless DC motor

Details Control circuit for a brushless DC motor Control circuit for a brushless DC motor

1982-04-20

1984-06-19

Smith, Jr., David

Electricity: motive power systems

Switched reluctance motor commutation control

318138, 318439, H02K 2900

Patent

active

044555148

ABSTRACT:
Disclosed is a control circuit for a brushless DC motor including a rotor having a series of alternating magnetic fields and a stator having a plurality of armature windings. The control circuit comprises at least one pair of Hall generators fixedly mounted with respect to the rotor for sensing the angular position of the rotor to generate a switching signal. An input torque command signal is applied sequentially to the armature windings in response to the switching signal to rotate the rotor. The strength of magnetic field linked with the windings and the magnitude of current generated therein are detected and multiplied to generate a torque representing signal which is subtractively combined with the input torque command signal prior to application to the windings.

REFERENCES:
patent: 3383574 (1968-05-01), Manteuffel
patent: 3783359 (1974-01-01), Malkiel
patent: 3938014 (1976-02-01), Nakajima
patent: 4344023 (1982-08-01), Yokobori et al.

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