ESE 2021 Technical Quiz || Commutation Techniques (App update required to attempt this test)

For also A commutation (Load commutation) the commutation circuit parametric L = 20 μH, C = 50 μF. For proper commutation what will be the value of load resistance

In a current cumulated chopper, peak commutating current is twice that of the maximum possible load current. The source voltage is 250 V dc and main SCR take off time is 50 μs. Voltage is 250 V dc and main SCR taken off time is 50 μs. If maximum load current is 250 A, then peak capacitor voltage is………V.

Class C commutation is shown in figure. Considering a safety factor of 2, what should be the value of capacitor C if the turn off time of both thyristors is 10μsecs?

In resonant pulse commutation, C = 30 μF and L = 5 μH. Initial voltage across capacitor = V_S = V_C = 240 V. If the constant load current of 240 A, then circuit then of time for main thyristor is______μsec.

The circuit employing class C commutation, has V_s = 200 V, R₁ = 60 Ω and R₂ = 90 Ω. The peak value of current i_T2 through thyristor is ……. A.