Drive circuit for brushless motor

Details Drive circuit for brushless motor Drive circuit for brushless motor

1995-01-06

1997-04-01

Wysocki, Jonathan

Electricity: motive power systems

Switched reluctance motor commutation control

318439, H02P 700

Patent

active

056169949

ABSTRACT:
A brushless motor driving circuit is provided for obtaining a reliable starting and stable rotation driving irrespective of the load condition of the motor. The brushless motor driving circuit has a terminal voltage detector located at each phase of the armature windings of the motor, a terminal voltage compensator for adding or subtracting a compensation value to/from the terminal voltage of the armature windings detected at respective phases during actual driving periods, and a comparator for comparing respective terminal voltages to obtain a rotor location signal after compensation has been performed. The compensation value is determined by a resistor of the armature winding and a winding current. The armature windings are driven by the rotor location signal detected at the comparator.

REFERENCES:
patent: 4712050 (1987-12-01), Nagasawa et al.
patent: 4743815 (1988-05-01), Gee et al.
patent: 5004965 (1991-04-01), Otokawa et al.
patent: 5036264 (1991-07-01), Ueki
patent: 5189349 (1993-03-01), Haga
patent: 5194787 (1993-03-01), Antognini
patent: 5198733 (1993-03-01), Wright

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