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Old 06-25-2010, 01:24 AM   #3480 (permalink)
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Originally Posted by jyanof View Post
First, whichever leg is on has to carry the full amount of current. So, if this controller were to have 2 banks of mosfets that alternate switching, they'd both have to be sized for 500A.
No. That's why I said split the battery pack up into six packs connected to the controller. So each bank of mosfets only gets one sixth of the current.

Originally Posted by jyanof View Post
Yes, switching high voltage increases the switching losses, so a lower input voltage would increase efficiency.
Calculations show that it is operating near 90% efficiency at this point and rises as the vehicle accelerates.
I've read a number of cases where people end up switching their balance of amps and volts to get better maximum speed, or better low speed acceleration. Being able to do this while driving would give you both.
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