Correct behaviour of a Full Bridge ZVS

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Mercury

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Hi guys,
I'm playing around with the simulation of a Full Bridge ZVS converter. My problem is, that I do not fully understand how to determine the value of the leakage inductance the transformer must have. In the sumulation (see the schematics) the output amplitude is dependant on the value of the leakage inductance. Is this correct? Because if this is so, I have not read about it anywhere.



Thanks!
 

If you are trying to simulate ZVS, your timing is incorrect. You are switching on diagonal MOSFETs M2-M3 simultaneously as in conventional hard switched convertors.
For ZVS, MOSFETs M3-M4 should be phase-shifted with respect to M1-M2. For example, for M3 change to TD=2us, for M4 change to TD=6us, should get you ZVS with phase shift of 2us.
 

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