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 will be the effect on output voltage (rms) on increasing the firing angle from 0 degree to 180 degree:
Fig. 2. Circuit configuration of AC voltage controller.
1. What will be the effect on output voltage (rms) on increasing the firing angle from 0 degree to 180 degree:
2. An 180 V, 50 Hz supply voltage is given to an AC voltage controller. What will be the power factor If the firing angle is 60 degree?
3. An 180 V, 50 Hz supply voltage is given to an AC voltage controller with resistive load of 100 ohms. What will be the rms current through SCR if the firing angle is 60 degree?
4. If firing angle is 60 degree, and extinction angle is 210 degree what will be the conduction angle?
5. What will be the effect on output voltage if both the thyristors are replaced by diodes?
6. An AC voltage controller is used to control the voltage applied to the resistive load. The supply voltage is 220 V AC and the controller operates with a firing angle of 30 degrees. Calculate the RMS output voltage assuming ideal conditions.
7. An AC voltage controller is used to control the voltage applied to a resistive load. The supply voltage is 220 V AC, and the controller operates with a firing angle of 30 degrees. Calculate the input power factor assuming ideal conditions.
8. A single phase AC voltage controller is controlling the load power demand (R = 5 Ω and L = 15 mH) from 230 V, 50 Hz source. What is the firing angle control range?
9. A single phase AC voltage controller is controlling the load power demand (R = 5 Ω and L = 15 mH) from 230 V, 50 Hz source. What is the maximum possible value of RMS load current?
10. A single phase AC voltage controller is controlling the load power demand (R = 5 Ω and L = 15 mH) from 230 V, 50 Hz source. What is the maximum power delivered to the load?