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soft-switching buck converter

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alpha05

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could anyone help me to analyze this soft-switching buck converter with ZVT..
 
Last edited:
Hi,

Where is the circuit?
 
circuit diagram

sorry I'm not very familiar with this site..that why i cannot attach circuit before..
sorry...
could anyone help me to analyze this circuit...
 

Attachments

  • Soft-switching buck converter.doc
    53.5 KB · Views: 265
Last edited:
Hello again,


I can not read your file, sorry. Try uploading it as a picture file like jpg or gif.
 
circuit 2

is this file better or not..
sorry about previous attachment..
 

Attachments

  • soft switching buck converter circuit.JPG
    soft switching buck converter circuit.JPG
    81.3 KB · Views: 492
  • pulse.JPG
    pulse.JPG
    49.2 KB · Views: 260
Any reason why using both IGBT and N-channel Mosfet?

I'll bet on that using a N-channel mosfet will provide less performance as there will be some voltage drop (much like an emitter follower for a bjt transistor).
 
output

actually i have simulate the circuit and get the output..
but I'm not very sure about the waveform..
could anyone help me??
whether my waveform is right or wrong...:)
 

Attachments

  • circuit 2.JPG
    circuit 2.JPG
    172 KB · Views: 211
  • output.JPG
    output.JPG
    87.5 KB · Views: 179
  • output2.JPG
    output2.JPG
    93.3 KB · Views: 265
Hello again,


You should two different drive signals in your schematic. Are they really the same drive or are they different levels and phase or something? Do you have a plot of those two signals?
 
actually the drive signal for both switch is in the first attachment-pulse..
the auxiliary switch will on first than the main switch will on..
Vr in attachment refer to auxiliary switch
Vm-main switch..

I was not really understand about soft switching part in this circuit..
how to know the circuit operation on their mode..
 

Attachments

  • pulse.JPG
    pulse.JPG
    49.2 KB · Views: 193
Last edited:
Hello again,


Well, if you want someone to see if your waveforms are right then you have to provide the details that will allow this kind of check. For example, what is the delay between one drive signal and the other? Also, what is the amplitude of the drive signals?
 
Last edited:
I have attach together file for simulation..
and other file time for 2 drive signal...
 

Attachments

  • simulation circuit.sch
    15.8 KB · Views: 129
  • drive signal.JPG
    drive signal.JPG
    33.4 KB · Views: 167
Hello again,

Sorry i dont have software to read your .sch file.
From the diagram, your Vm and Vr signals are only 1 volt each?
 
Last edited:
Are the Vr and Vm just opposite of each other? A ask because the plot only reveals the first half cycle as I can see.
 
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