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Old 10-23-2015, 08:52 PM   #2232 (permalink)
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Originally Posted by MPaulHolmes View Post
I think I"m going to have 2 separate power boards. One with electrolytic caps, and one with dc link film caps. You can fit 12 of 60uF film caps, for a total ripple rating of about 200amp. But the cost is about $160. You can also do 15 of 470uF 400v electrolytic caps that have similar characteristics to the ones I use in the 500amp DC controller (so I know it would be good enough). That would also make the DC bus change much more slowly from the boosting and bucking (millisec instead of microsec) so you wouldn't have to be quite as vigilant in the software. And then you can also do it for $59. So, then the cost of parts would be $290 (in quantity 1) or so. Well, you would need an extra current sensor, dang it. I can only fit 2 on the power board.The 3000hour rating isn't such a big deal. That's like 1 hour of driving daily for 9 years.
Are you ready to build these for testing?

My wife is in Mesa for the next 3 weeks and could transport a couple of them home for torture testing It would save some shipping costs!

With 8s2p of the Leaf tins I can configure 64V nominal at 120A (1C) or 360A (3C) for a minute or so. Just a suggestion
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MPaulHolmes (10-23-2015)