Explain with circuit diagram and waveform the operation of single phase center tapped full wave controlled rectifier with R load.

Ans:

Working:

• For the positive half cycle of applied voltage, SCR1 conducts during the period  α to π radians where α is the firing angle. 
•  During the negative, SCR2 conducts for an interval (π + α) to 2π radians. 
•  The firing angle α may be changed by changing the gate current.