09-11-2016, 10:01 AM
1467267920-Exp4SinglephaseSCRbasedhalfcontrolledbridge.doc (Size: 109 KB / Downloads: 7)
AIM
To study the operation of Single-phase
i) half controlled converter with R and RL loads.
ii) fully controlled converter with R and RL loads
PROCEDURE (SCR Based Half Controlled Converter)
For R load:
1. Connections are made as per the circuit diagram.
2. Ensure that the potentiometer (POT) of the control circuit is in minimum position.
3. Switch ON the module power switch and the CRO.
4. Switch ON the debounce logic switch in the control circuit.
5. Vary the control voltage using the potentiometer (POT) of the control circuit from minimum to maximum in step by step.
6. For each step note down output voltage, firing angle ().Calculate output voltage using the formula.
For RL load:
1. Connections are made as per the circuit diagram.
2. Ensure that the potentiometer (POT) of the control circuit is in minimum position.
3. Switch ON the module power switch and the CRO.
4. Switch ON the debounce logic switch in the control circuit.
5. Vary the control voltage using the potentiometer (POT) of the control circuit from minimum to maximum in step by step.
6. For each step note down output voltage, firing angle (). Calculate output voltage using the formula.
PROCEDURE (Fully Controlled Bridge Converter)
For R load:
1. Connections are given as per the circuit diagram.
2. Ensure that the potentiometer (POT) of the control circuit is in minimum position.
3. Switch ON the module power switch and the CRO.
4. Switch ON the debounce logic switch in the control circuit.
5. Vary the control voltage using the potentiometer (POT) of the control circuit from minimum to maximum in step by step.
6. For each step note down output voltage, firing angle (). Calculate output voltage using the formula.
For RL load
1. Connections are given as per the circuit diagram.
2. Ensure that the potentiometer of the control circuit is in minimum position.
3. Switch ON the module power switch and the CRO.
4. Switch ON the debounce logic switch in the control circuit.
5. Vary the control voltage using the potentiometer (POT) of the control circuit from minimum to maximum in step by step.
6. For each step note down output voltage, firing angle () and extinction angle (). Calculate output voltage using the formula.