If the firing angle in an SCR rectifier is decreased, the output is
Right Answer is:
Firing angle is simply the reference to the voltage level at which the SCR is turned on. This can be done by sending a precisely timed pulse into SCR Gate to begin conduction at the desired voltage level. Considering the fact that the entire sinusoidal voltage has a 360-degree phase, you can find the phase angle at which the SCR should be turned on which will be its “firing angle”.
The average value of the load voltage is
Vout = 0.225 (1 + cosα ) Vin
A table showing the values of the output voltage based on different firing angles is helpful to understand this rectifier. The output voltage is high at very low firing angles. As the firing angle is increased, the output voltage decreased.