View Single Post
Old 04-14-2017, 05:02 PM   #3104 (permalink)
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: 1,368
Thanked 1,202 Times in 765 Posts
I've been charging the Leaf at 3.6kW with the split phase inverter that uses the same board as the AC control/driver board, but until now I was just taking the Solar DC input, and basing the AC output voltage on that. The problem was, under load, there would be more losses after the IGBTs so that even if the bus capacitor said, say, 500vDC, you would PWM that down to get a "340vDC" with which you would generate the 240vAC and 120vAC waveforms, it wouldn't REALLY be 340vDC. It would be a nonlinear function of the AC current.

I just finished populating an AC voltage monitoring board, and mounted it above the other board, and just got it wired, so now I'm about to test the new code, which keeps the 2 120v phase voltages balanced, and also keeps the sum of them equal to 240v.
kits and boards
  Reply With Quote
The Following User Says Thank You to MPaulHolmes For This Useful Post:
thingstodo (04-15-2017)