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My IGBT's can handle 60KHz. Model FF600R12ME4, but that would require some beefy gate drivers pumping out 20-30 Amps peak current.
ZVS would avoid the need for the SiC rectifier altogether and would allow a small (inductance) inductor to be used. After all we are looking for discontinuous.
I have some literature for fly-back ZVS and thyristor forced commutation that I may look at. These would be a good starting point. One just needs to calculate the LC resonant frequency.
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