Quote:
Originally Posted by jakobnev
It "should" work as long as each converter is working, but what happens if one should shut down(for what ever reason) and suddenly sees -750v (yes negative) inside it? (in a place it shouldn't be possible no less since you hacked it)
(edit)
After posting i thought of two things:
1. if the outputs are galvanically insulated, you can make one 2s6p pack for all converters, instead of giving each converter it's own 2s pack, this eliminates the risk of one converter running out of input-juice.
2. You can give each converter a bypass diode to protect it if it shuts down.
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Adding one diode between inverter stages and one as a bypass for each inverter sounds like a good fix.
What do you put between the old and unbalanced batteries to allow them to be run in parallel? Diodes?
With one 2s pack each, the supplies are isolated from each other. The loss of one reduces the output voltage by 150V but can be survived. Hopefuly I can figure out a way to 'enable' each inverter separately and can shut them down when the battery voltage drops below 11.0 V. Schottky diodes that can deal with 100 amps or so will drop about 3V. 5 diodes, 35A continuous, another 175W of precious battery power dissipated as heat ...