Control system for commutatorless motor driven through frequency

Details Control system for commutatorless motor driven through frequency Control system for commutatorless motor driven through frequency

1978-12-04

1981-04-14

Rubinson, Gene Z.

Electricity: motive power systems

Synchronous motor systems

Braking

318722, 318758, 318764, H02P 540

Patent

active

042622417

ABSTRACT:
A control system for a commutatorless motor comprises a frequency converter which includes two graetz-connected thyristor converters and D.C. lines interconnecting the converters, between an A.C. motor and an A.C. power supply. Motoring operation and regenerating operation are selectively effected between the motor and the power supply. In switching the operation mode, one of the converters which has been operated in a recitifier operation mode is first switched to an inverter operation mode, and after it has been confirmed that a control voltage to determine a firing angle of the one converter has been shifted to an inverter region, the other convertor is switched to the rectifier operation mode.

REFERENCES:
patent: 3780361 (1973-12-01), Poppinger et al.
patent: 3815003 (1974-06-01), Wiart
patent: 4088932 (1978-05-01), Okuyama et al.
patent: 4137489 (1979-01-01), Lipo

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