Ac motor drive with improved voltage-source inverter

Details Ac motor drive with improved voltage-source inverter Ac motor drive with improved voltage-source inverter

1989-06-02

1990-09-25

Shoop, Jr., William M.

Electricity: motive power systems

Induction motor systems

Primary circuit control

318762, H02D 318

Patent

active

049596020

ABSTRACT:
A bridge between the inductor and the capacitor of the DC-Link of a voltage-source inverter AC motor drive includes a GTO (or transistor) device used for forced-commutation in the regenerating mode, while the current is controlled ON and OFF according to a duty-cycle defined by an hysteresis circuit to hold the current flowing into the inductor to a magnitude which establishes a boost on the capacitor voltage, so that in the motoring, as well as the regenerating mode of operation, the voltage of the capacitor is kept constant and higher than upon the converter output.

REFERENCES:
patent: 4353023 (1982-10-01), Kawada et al.
patent: 4395612 (1983-03-01), Wirth
patent: 4434393 (1984-02-01), Kobari et al.
patent: 4670827 (1987-06-01), Schneider
patent: 4697131 (1987-09-01), Schauder et al.
patent: 4788635 (1988-11-01), Heinrich

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