Aim
To obtain AC voltage from DC input using Single phase PWM inverter.
Apparatus required
☞IGBT base single phase inverter kit.
☞Patch cards.
☞Power card.
☞CRO.
Circuit Diagram for IGBT Based Single Phase Inverter
Mimic Diagram for IGBT Based Single Phase Inverter
Precaution Steps
☞Switch ON SW2 and observe the pulse across the Triggering Pulse.
☞Switch ON SW1 and observe the DC Voltage across Vs.
☞Then Switch off SW1 and SW2.
Procedure
☞Connections are made as shown in circuit diagram.
☞First turn on SW2 (triggering pulse supply).
☞Turn on SW1 (Main power supply).
☞Connect the probe across the Load terminal and observe the output waveform.
☞Note down total time period in the corresponding tabulation.
Tabulation
| S.No | T(ms) | Frequency(Hz) | Output(V) |
| 1 | 20 | 50 |
Model Calculation
F= 1/T Where, F is output frequency, T is total time period (i.e) 360oF= 1/(20*10-3) = 0.05*103 = 50Hz
Output Waveform
Output from DSO
