What is Class A commutation of Thyristors?
Class A is one of the frequently used thyristor commutation techniques. If thyristor is triggered or turned on, then anode current will flow by charging capacitor C with dot as positive. The second-order under-damped circuit is formed by the inductor or AC resistor, capacitor, and resistor. If the current builds up through SCR and completes the half-cycle, then the inductor current will flow through the SCR in the reverse direction which will turn off the thyristor.
After the thyristor commutation or turning off the thyristor, the capacitor will start discharging from its peak value through the resistor in an exponential manner. The thyristor will be in reverse bias condition until the capacitor voltage returns to the supply voltage level.
How to Calculate Thyristor conduction time for Class A commutation?
Thyristor conduction time for Class A commutation calculator uses Thyristor conduction time = pi*(sqrt(Inductance*Capacitance)) to calculate the Thyristor conduction time, The Thyristor conduction time for Class A commutation formula is defined as the time period for which a thyristor conducts in class A commutation. Thyristor conduction time is denoted by t_{o} symbol.
How to calculate Thyristor conduction time for Class A commutation using this online calculator? To use this online calculator for Thyristor conduction time for Class A commutation, enter Inductance (L) & Capacitance (C) and hit the calculate button. Here is how the Thyristor conduction time for Class A commutation calculation can be explained with given input values -> 12.16734 = pi*(sqrt(5*3)).