SCR Commutation Techniques Objective Questions – Part 1

The thyristor turn-off requires that the anode current

The type of commutation when the load is commutated by transferring its load current to another incoming thyristor is

In case of class B commutation or resonant-pulse commutation with L = 5 μH and C = 20 μC with initial voltage across the capacitor (Vs) = 230 V. Find the peak value of resonant current.

An SCR is connected in series with L = 5 mH and C = 20 μF. Find the resonant frequency of the circuit.

In case of class A type commutation or load commutation with low value of R load the

In case of class B commutation or resonant-pulse commutation with L = 5 μH and C = 20 μC with the initial voltage across the capacitor (Vs) = 230 V. Find the conduction time for auxiliary thyristor.

The class A commutation or load commutation is possible in case of

The natural reversal of ac supply voltage commutates the SCR in case of

The type of commutation in which the pulse to turn off the SCR is obtained by separate voltage source is

__________ commutation technique is commonly employed in series inverters.