Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1974-06-19
1976-04-13
Shoop, William M.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307260, 307264, 307268, 307252J, H02M 700
Patent
active
039506932
ABSTRACT:
An ignition apparatus for triggering a plurality of thyristors connected in series and/or in parallel is disclosed. The apparatus includes a high frequency power source, a switch for interrupting the output of the high frequency power source, a pulse generator, a gate transformer for supplying the output of the high frequency power source and the pulse current from the pulse generator to the gate of a thyristor, and a controlling device for controlling the switching time of the switch and the time of pulse-generation by the pulse generator. The switch and the pulse generator are controlled by the controlling device so as to feed a current pulse to the gate transformer from the pulse generator before the output of the high frequency power source is supplied to the gate transformer by actuating the switch. Thus, a gate current having a fast rise time, a desirably controlled time interval and a suitable amplitude is provided supplying a large output capacity for the ignition apparatus for simultaneously triggering the plurality of thyristors connected in series and/or in parallel. This apparatus eliminates the prior art requirement for employment of separate rectangular wave AC generators for each group of thyristors having the same ignition period.
REFERENCES:
patent: 3448300 (1969-06-01), Gyogyi
patent: 3480797 (1969-11-01), Bedford et al.
patent: 3646578 (1972-02-01), Gregory
patent: 3662248 (1972-05-01), Amano et al.
Mitsubishi Denki & Kabushiki Kaisha
Shoop William M.
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