Performance measurement and analysis of single phase AC voltage controller

Answer the questions given below (refer Fig.2):


Fig. 2. Circuit configuration of AC voltage controller.


1. What is the possible range of firing angle to control the AC voltage?
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2. If firing angle is 45°, and extinction angle is 210° what will be the conduction angle?
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3. A single-phase half wave AC voltage controller consists of
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4. An 180 V, 50 Hz supply voltage is given to an AC voltage controller. What will be the input power factor if the firing angle is 60°?
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5. Maximum voltage (Vmax) across the SCR at firing angles 30° and 150° will be (Vm is the peak source voltage):
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