Thyristor control circuits

Details Thyristor control circuits Thyristor control circuits

1980-10-20

1982-06-01

Shoop, William M.

Electricity: power supply or regulation systems

External or operator controlled

Zero switching

307252UA, G05F 320

Patent

active

043330487

ABSTRACT:
A thyristor control circuit arrangement which overcomes the problem of radio frequency interference comprises two parallel-connected oppositely-poled thyristors (TH1 and TH2) arranged to conduct alternatively for supplying power to a load (L) from an a.c. supply and thyristor control means (GA1-GA6 and LA1 and LA2) for detecting the polarity of the voltage across the parallel-connected thyristors (TH1 and TH2) and in response to the operation of ON/OFF control means consequently to condition one of the thyristors which has a negative voltage across it in readiness for immediate firing thereof as the voltage changes from a negative to a positive voltage.

REFERENCES:
patent: 3283177 (1966-11-01), Cooper
patent: 3940634 (1976-02-01), Grogan
patent: 4021683 (1977-05-01), Splatt

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