Single Phase Semi Converter

Single Phase Semi Converter

Tags: Single Phase Semi Converter, Single Phase Semi Converter with Lamp Load, AC to DC Semi Converter, Circuit Diagram for Semi Converter with RLoad, Circuit Diagram for Semi Converter with RLLoad,, Model Waveform for RLoad, Model Waveform for RLLoad, Firing angle Calculation, DC Motor Control using Semi Converter, Pulse for SCR
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single-phase-semi-converter
SINGLE PHASE SEMI CONVERTER

Aim

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


Apparatus required

  • Single phase semi converter kit
  • Patch cards
  • Power card
  • CRO
 

Circuit Diagram



circuit--diagram-for-single-phase-semi-converter


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-for-single-phase-semi-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 Rheostat, 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-for-single-phase-semi-converter


Pulse For SCR



pulse-for-single-phase-semi-converter


Model Graph



model-graph-for-single-phase-semi-converter


Firing angle α variation



firing-angle-for-single-phase-semi-converter


Observation

S.NO

OFF Time(ms)

ON Time(ms)

Alpha(α in Degree)

Vo(Volts)

1

4

6

72

2

 

 

 

 

3

 

 

 

 

4

 

 

 

 

5

 

 

 

 


 

Model Calculation

1. Total Time Period



total-time-period--for-single-phase-semi-converter


2. The Average Output Voltage


average-output-voltage-for-single-phase-semi-converter-

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