Full bridge PWM converter

Archit said:

I want to generate 350V from 40V

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ronsimpson said:

350V & 25 ohms = 4900 watts. Is that right?
40V & 120A = 4900 watts. You are using 800 V MOSFETs and you should be using 60V and much lower Rdson parts.

Also changed the diodes from 0.2A to 5A. Should be 10A but no problem in SPICE.

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Archit said:

Changed the switch but still not working.

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ronsimpson said:

Then try the file I posted. I removed one inductor because you can not ramp 30uH from 100A to -100A in a very short time.

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Archit said:

but I need that leakage inductance for Zero voltage switching of my mosfet.

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Archit said:

transformer practically implementable?

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ronsimpson said:

OK, You need some. But you can not force +/-100A through a 30uH inductor with only 40 volts. Add back the inductance and make it small like 30nH. (I don't know but you need to move from -120A to +120A in 5% to 10% of your switching time, with 40V across the inductance.)
10%=1uS, 5%=500nS 2.5%=250nS
delta current 240A
Voltage =40V

Thankyou. I have one more doubt.Does magnetizing inductance be 30uH or 30uH+(3/n^2)mH. Will the secondary side also reflected in magnetizing inductance?

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