Circuit and method for controlling an alternating or three-phase

Details Circuit and method for controlling an alternating or three-phase Circuit and method for controlling an alternating or three-phase

1984-03-01

1985-10-08

Smith, Jr., David

Electricity: motive power systems

Induction motor systems

Primary circuit control

318729, 318806, H02P 540

Patent

active

045463018

ABSTRACT:
A method and circuit for regulating an alternate or three-phase current motor, a pulse inverter with a capacitive direct current intermediate circuit is used through which the motor is supplied with a substantially constant voltage by means of electronic switches and corresponding antiparallel recovery diodes. For this purpose, the reactive motor current is measured for utilization in the feedback control system. To this end, the feedback current from the motor inductance to the capacitor of the intermediate circuit is measured and the value obtained is used to form a control signal for regulating the reactive current.

REFERENCES:
patent: 3612971 (1971-10-01), Blaschke
patent: 3753063 (1973-08-01), Graf
patent: 4291264 (1981-09-01), Siemon

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