Question

In the circuit shown below,



If the turn off time of the SCRs is 40 $\mu$s and safety margin is 2, then the approximate minimum value of capacitor required for proper commutation is ______ $\mu$F. (Answer up to two decimal places)

Answer 1

The minimum value of capacitor required for proper commutation is,

$C=\frac{2\times t_{c1}}{R_{2}ln\left(2\right)}=\frac{2\times 40\times {10}^{-6}}{20\times ln\left(2\right)}$

$C=5.77\times {10}^{-6}F=5.77\mu F$