Phase control apparatus

Details Phase control apparatus Phase control apparatus

H - Electricity

02

M

323/10

H02M 5/257 (2006.01) H02M 7/515 (2006.01)

Patent

CA 1104208

16/13 PHASE CONTROL APPARATUS ABSTRACT OF THE DISCLOSURE A phase control apparatus is disclosed wherein a pair of transistors are alternately switched by an A.C. signal source. Each of the transistors is connected in series with an auxiliary thyristor and a primary winding of a pulse transformer to a D.C. power supply. Each of the auxiliary thyristors is fired by a magnetic phase shifter having an A.C. winding connected between a positive terminal of the D.C. power supply and a gate of the auxiliary thyristor. Connected to secondary windings of the pair of pulse transformers are gate circuits of a pair of main thyristors to which an A.C. voltage which is substantially in synchronism with the A.C. signal source is applied.

267876

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