Method and apparatus for controlling an alternating current moto

Details Method and apparatus for controlling an alternating current moto Method and apparatus for controlling an alternating current moto

1980-12-23

1982-09-14

Smith, Jr., David

Electricity: motive power systems

Induction motor systems

Primary circuit control

318803, 318798, 363 65, 363 71, H02P 540

Patent

active

043497721

ABSTRACT:
A plurality of controlled current inverter circuits each including a plurality of electrical current conducting legs having controlled rectifiers and associated commutating capacitors are connected in parallel and individually controlled to collectively supply an alternating current motor load with electrical power. At high speed, low required torque conditions, less than the total number of inverter circuits are maintained operative to thereby maintain sufficient current within the effective inverter circuit or circuits to sustain effective inverter commutation.

REFERENCES:
patent: 2623203 (1952-12-01), Demuth
patent: 3381205 (1968-04-01), Howell et al.
patent: 3781616 (1973-12-01), Mokrytzki
patent: 3970914 (1976-07-01), Salzmann et al.

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