Question

Note:
You are attempting question 4 ou
A class C (complementary) commutation circuit is used to
circuit has the following parameters,
Voc – 230 V, R = 2012, and R = 1002
Each SCR has a minimum charging current of 4 mA to
capacitance is 20 pF. The minimum value of the capacit
ch
tumed on due to reapplied is,
dt
(a) 14F
(b) 10 uF
(c) 0.1 MF
(d) 0.05 uF
Answer
D
​

Answer 1

Answer:

A class C (complementary) commutation circuit is used to commutate the SCRs. The circuit has the following parameters,

VDC 230 V, R₁ 2012, and R₂ = 100 2

Each SCR has a minimum charging current of 4 mA to turn it on and its junction capacitance is 20 pF. The minimum value of the capacitor so that SCRs do not get

turned on due to reapplied is,