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Hi.
Yes, higher voltage is better... for the controller and that's about it. It's not so good for when you need to attach your peripherals to the pack like your DC-DC since there are no cheap ones for higher voltages. Charging your pack can only be done with a boost converter and it's complexity, expense and losses. Your pack will be considerably heavier than a low voltage pack when using prismatic cells like we do. Do a quick check on this and you'll see. This means that any efficiency gains for higher voltage will be lost in extra battery pack weight. There are more cells to check or BMS and more interconnects to buy and maintain. I'd say ~350V bus is a good compromise.
EV controllers are not servo/position drivers. The loss of the "encoder" will not default the controller to spin up the motor out of control. Or at least it's not... hmmm... "best-practice" for the software to spin the motor in all directions if it can't see shaft feedback. That used to happen in the early days when servo controllers were all hardware. Ever seen an IBM mainframe printer feed a whole box of paper in 45 seconds? But yes, LED feedback on this application is not that good.
That's good progress, Paul! Hopefully David hasn't given up on this plans either.
JR
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