Electronic – Rectifier circuit with unexpected output

igbtpower electronicsproteussimulation

Output

I am developing a circuit using Proteus 8.

My aim is to get a full wave (discrete) sine output to the load. I use an IGBT to switch the full wave rectified signal and get output in pulse form (purple output in oscilloscope.)

My issue is I do not get the expected output to the lamp.

This is the expected output:

expected output to the lamp

Schematic:

Schematic

I have connected 2 probes to oscilloscope and measured the signal before the lamp and after the lamp (yellow signal and blue signal outputs.)

  • Why are these two outputs different?
  • Why I don't get a full wave signal as output?

(Original Google Drive link to the images is here.)

Best Answer

You are not looking at the lamp voltage, but at two points relative to ground (VF1, VF2). What you see is right. három

If you really look at the voltage of the lamp, it will look the way you expected it to: egy

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