Dennis Miles wrote:
The circuit of the motor controller makes a difference. The old SCR controllers needed the inductive CEMF kick to assure switching, Modern IGFET power transistors do not. so they can act as battery chargers.
I've actually observed just the opposite with the controllers I've tried this with. The old GE EV-1 SCR controller has its own internal inductors, and worked fine with a resistor or battery as a load.
Solid state controllers with IGBTs or MOSFETs can drive a resistive load, as long as the peak current doesn't exceed their current limit. But they cannot drive a battery as load; the battery's resistance is too low.
-- Any intelligent fool can make things bigger, more complex, and more violent. It takes a touch of genius, and a lot of courage, to move in the opposite direction. -- Albert Einstein -- Lee Hart's EV projects are at http://www.sunrise-ev.com/LeesEVs.htm _______________________________________________ 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)
