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Aim

To obtain DC voltage from AC input using Single phase Full Wave Converter with R load and RL load and also with freewheeling diode and without freewheeling diode.

Apparatus required

Single phase full converter kit

☞Patch cards

☞Power card

☞CRO

Circuit Diagram

circuit--diagram-for-r-load


Procedure

CRO Settings

Time (X) Axis : 5ms/div

Voltage (Y) Axis: 20V/div

Probe :1:10 CRO Probe is suitable one.

Initial Settings

☞Ensure the 230V Power Supply is in proper with Tester.

☞Ensure the CRO is working properly with probe checking and proper ground line axis.

Mimic Diagram


mimic-diagram-of-single-phase-full-converter

Experiment Steps

☞The connections are made as per the circuit diagram given above.

☞The R Load must be 60W bulb or 200ohm/2A Rheostat. The Load is 120mH/2A.

☞When the load is R heostat, then it must be in maximum position.

☞Turn on the SW2 and observe the waveform across between G1&K1, G2&K2, G3&K3, and G4&K4. And ensure it is like triggering pulse given in model graph.

☞Turn ON SW1 and observe the waveform across the R load and RL Load.

☞Measure the X-axis time interval of ON time of Load Voltage and OFF Time of Load Voltage.

☞Adjust the value of Firing angle and note down the load voltage and current.

☞Repeat the step 6.

☞Repeat the experiment for different values of α and note down Vo.

Note: *If the connections are wrong the kit will get damage. *The load must be R and RL. Do not connect L Load alone.

Model Waveform



model-waveform-of-single-phase-full-converter

Model Graph



model-graph-of-single-phase-full-converter

Figure: Output Load Voltage and Current

Firing angle α variation

firing-angle-of-single-phase-full-converter



Observation

  

S.NO

OFF Time(ms)

ON Time(ms)

Alpha(α in Degree)

Vo(Volts)

1

4

6

72

64

2

 

 

 

 

3

 

 

 

 

4

 

 

 

 

5

 

 

 

 

 

 

Model Calculation

1. Total Time Period



total-time-period--of-single-phase-full-converter

2. The Average Output Voltage



average-output-voltage-of-single-phase-full-converter-value-64

Circuit Diagram for RL-Load


circuit-diagram-for-rl-load

Model Waveform

model-waveform-single-phase-full-converted

Observation

S.NO

Alpha(α in Degree)

Beta(b in Degree)

Measured Voltage (Volts)

Calculate Voltage (Volts)

1

72

36

   

2

 

 

 

 

3

 

 

 

 

4

 

 

 

 

5

 

 

 

 

 

Model Calculation

The Average Output Voltage


average-output-voltage-single-phase-full-converter-

Result

Thus the above experiment for Single Phase Full Converter is done and the result was verified with R and RL Load.