marcos wrote: ↑
Dec 16, 2017 5:11 pm
That array of snubber-like dc link could have a tenth of the parasitic inductance if you could use a laminated bus bar.
The question is if that monster cares at all about a few nH of inductance. Depends on your rise times, I guess you have heatsinking room to switch it slower.
Its looking good!
I think it will be quite awesome. Because each + and - will have 3 paths from top to bottom and a parallel link on each the top and bottom cutting inductance into 1/3 But I am well aware it should have laminated DC buss... EACH IGBT is laminated inside but the power buss I designed under the caps is not. I know this is a risky move but so far the CRX has worked without any laminated buss what so ever!
When I was researching laminated Buss I was under the impression it was for reducing the fields caused by high voltage and the swing of those high voltages. But if the DC bus moves slow and stays fairly smooth it will not be as big of a deal. I think with the bad ass cap arrangement I came up with it should be VERY stiff!