View Single Post
Old 10-23-2015, 09:10 PM   #2230 (permalink)
MPaulHolmes
PaulH
 
MPaulHolmes's Avatar
 
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 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.
__________________
kits and boards
  Reply With Quote
The Following User Says Thank You to MPaulHolmes For This Useful Post:
thingstodo (10-23-2015)