SCR Commutation Techniques Objective Questions – Part 2

Class E commutation is a/an

For the circuit shown in the figure below, ___ type of commutation would take place for the SCR (THY1)

For the circuit shown in the figure below,
C = 4 pF
L = 16 μH
Vs = 200V
The capacitor voltage after the SCR is self commutated is

Natural commutation of an SCR takes place when

___________ commutation is usually used in phase-controlled rectifiers

Parallel-capacitor commutation is

For the circuit shown in the figure below,
C = 4 pF
L = 16 μH
Vs = 200 V
The peak thyristor current is

Below is the circuit of a resonant-pulse commutation, the maximum voltage to which the capacitor C charges is

For the circuit shown in the figure below, R1 = 50 Ω, R2 = 100 Ω, Vs = 100 V. At the time of turn-on of the SCR, initial thyristor current is

For the circuit shown below, The maximum value of current through thyristors T1 & TA can be given by