Process and electronic circuit for controlling a brushless direc

Details Process and electronic circuit for controlling a brushless direc Process and electronic circuit for controlling a brushless direc

1990-03-27

1991-05-28

Ro, Bentsu

Electricity: motive power systems

Switched reluctance motor commutation control

318138, 318430, H02P 602

Patent

active

050197568

ABSTRACT:
A method and electronic circuit for controlling a brushless direct current motor, the motor having stator coils and a rotor with permanent magnets, in which the rotor position is detected by induced voltages. A control circuit has an inverter for supplying current (I.sub.1, I.sub.2, I.sub.3) to the stator coils (1, 2, 3); a circuit detecting the relative position of the rotor-stator from the induced voltages; and a control circuit processing information (I.sub.m) of current being supplied by the inverter to the stator coils, reference speed (W.sub.ref) and on rotor position (P.sub.1, P.sub.2, PP.sub.3) by sending control signals (S1 to S6) to the inverter. The control circuit comprises a main logic circuit or digital memory, delay elements connected in series, a circuit controlling the supply of current to the motor, a circuit detecting the minimum speed limit of the motor, a circuit for converting the frequency/voltage, a voltage comparator circuit and a Proportional-Integral-Derivative circuit.

REFERENCES:
patent: 4580082 (1986-04-01), Guerin-Pinaud
patent: 4603283 (1986-07-01), Oltendorf
patent: 4673849 (1987-06-01), Sears et al.
patent: 4678973 (1987-07-01), Elliott et al.
patent: 4712050 (1987-12-01), Nagasawa et al.
patent: 4874993 (1989-10-01), Tanaka et al.
patent: 4928043 (1990-05-01), Plunkett

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