Figure 1 shows the power-circuit of a load commutated chopper.This chopper circuit consist of four thyristors $T_1,T_2,T_3,T_4$ and one commutating Capacitor C.Here,thyristors $T_1, T_2$ from one pair and thyristors $T_3, T_4$ form another pair which conduct the load current alternatively.When one thyristor pair $T_1,T2$ functions as main thyristors,at the …