driving a netgain warp7 motor with it. i was planning to limit the duty cycle to 50% to limit the voltage to the motor to half the pack voltage. Current limit would be handled by the controller.
higher pack voltage smaller heating losses in cables, battery leads, and igbt's themself, but the motor doesn't like to see much more than about 200 volts. HIgher pack voltage also means we need to parallel fewer cells (since we will be paralleling the battery at the cell level, rather than simply paralleling each string.) Also, if we end up switching to a higher voltage motor, it would be a very simple matter to re-program the controller to allow a full 100% duty cycle.
|