"Can AC controllers function as voltage transformers in order to allow the use of a higher voltage battery pack in order to compensate for battery sag that might keep you from achieving max power and holding that power to max set RPM in your controller output?"
Yes. Most modern DC and AC controllers use pulse width modulation to control voltage to the motor. The input voltage is very low at small loads, regardless of pack voltage. The flux from the field windings in an AC motor forms a sinusoidally varying wave in space, rotating at the frequency of the controller output voltage, whereas in a DC motor the flux from the field windings is fixed in space, but they both use PWM to vary the amplitude of the motor input voltage. -- View this message in context: http://electric-vehicle-discussion-list.413529.n4.nabble.com/Re-9-motor-Mishap-tp4660137p4660249.html Sent from the Electric Vehicle Discussion List mailing list archive at Nabble.com. _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
