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MPaulHolmes · 01-13-2015, 05:56 PM

I was looking at resonant soft switching. Lee Hart was helping me out with understanding it on the EVTech list. A standard "fast switching" igbt module that's rated for 1200v 300amp is $172 new
Powerex Product: CM300DY-24NFH

and can do 70KHz if you add the Zero voltage switching. It doesn't look that complicated. You just add a capacitor and inductor, and some sort of circuit for inferring when the zero voltage crossing is happening. It can actually make the IGBT switching losses go to ZERO (epsilon haha).

Going to the 300amp SiC module would mean being able to probably switch at hundreds of KHz. If only it were cheaper.

01-13-2015, 05:56 PM	#1589 (permalink)
MPaulHolmes PaulH Join Date: Feb 2008 Location: Maricopa, AZ (sort of. Actually outside of town) Posts: 3,832 Michael's Electric Beetle - '71 Volkswagen Superbeetle 500000 Thanks: 1,362 Thanked 1,202 Times in 765 Posts	I was looking at resonant soft switching. Lee Hart was helping me out with understanding it on the EVTech list. A standard "fast switching" igbt module that's rated for 1200v 300amp is $172 new Powerex Product: CM300DY-24NFH and can do 70KHz if you add the Zero voltage switching. It doesn't look that complicated. You just add a capacitor and inductor, and some sort of circuit for inferring when the zero voltage crossing is happening. It can actually make the IGBT switching losses go to ZERO (epsilon haha). Going to the 300amp SiC module would mean being able to probably switch at hundreds of KHz. If only it were cheaper. __________________ kits and boards