Brushless direct current motor control system with protection ci

Details Brushless direct current motor control system with protection ci Brushless direct current motor control system with protection ci

1984-09-13

1986-05-13

Roskoski, Bernard

Electricity: motive power systems

Switched reluctance motor commutation control

318138, 318434, 318439, H02P 602

Patent

active

045889333

ABSTRACT:
A brushless direct current motor control system is disclosed in which a permanent magnet rotor induces voltages in phase windings and wherein these voltages are compared to a reference signal to provide for the proper cyclic and sequential energization of the motor drive phase windings. A protection circuit is utilized to couple a reference level, corresponding to the level about which the phase induced signals vary, as an input to the motor control circuit for effective comparison with the phase induced signals so as to provide for the proper sequencing of phase excitation. The protection circuit typically provides a substantially constant voltage drop between the reference level of the induced voltages and the input terminal of the motor control circuit with the protection circuit also preventing any excessively large magnitude voltages from being applied as an input to the motor control circuit. The input signal to the motor control circuit provided by the protection circuit also provides operative power to the motor control circuit.

REFERENCES:
patent: 3584280 (1971-06-01), Inagaki
patent: 3662237 (1972-05-01), Favre
patent: 4262236 (1981-04-01), Gelenius et al.
patent: 4262237 (1981-04-01), Gelenius
patent: 4403177 (1983-09-01), Weber et al.
patent: 4472666 (1984-09-01), Akeda et al.

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