Gate control system of the inverter using gate-turn-off thyristo

Details Gate control system of the inverter using gate-turn-off thyristo Gate control system of the inverter using gate-turn-off thyristo

1980-02-19

1981-11-17

Shoop, William M.

Electric power conversion systems

Current conversion

Including automatic or integral protection means

363137, H02H 7122

Patent

active

043015000

ABSTRACT:
There are arranged an oscillator for generating a first pulse signal on which the AC output frequency of the inverter is based, a delay circuit for generating a second pulse signal delayed for a predetermined period of time from the first pulse signal, and a ring counter for generating responsive to the second pulse signal a phase reference signal corresponding in phase to the AC output of the inverter. An ON pulse is generated responsive to the second pulse and the phase reference signal and an OFF pulse responsive to the first pulse and the phase reference signal. A negative bias signal is generated following the OFF pulse. At the time of operation stop the negative bias signal following the ON and OFF pulses is applied to GTO thyristors simultaneously.

REFERENCES:
patent: 4118770 (1978-10-01), Sugimoto et al.
patent: 4215394 (1980-07-01), Galloway et al.

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