Lee I agree some inductance is good for a controller -- but surely it's possible to have too much?
The truck motor weighs 2600 lbs. That's 15 Kostov sepex motors worth of weight. If you tried to ramp up or ramp down the current faster than the LR time constant, might it not spike the voltage high enough to hurt something? Just intuitively, it seems 15 Kostovs in series would give a controller designed for a single motor problems -- or is there an error in my thinking and a controller can handle 15x inductance? Another way to ask the question is what's the fastest safe rate for changing current as a function of inductance? Would you have to slew 15x slower if you have 15x the inductance? ----- Original Message ----- From: Lee Hart Sent: 08/13/13 12:37 PM To: Electric Vehicle Discussion List Subject: Re: [EVDL] S.E.P.X . controller for 500V , 450Amp Motor ... [email protected] wrote: > A car controller might not be able to handle so much > inductance unless you ramped the current very slowly. Inductance is the *friend* of motor controllers! They *like* high inductance; in fact, they have trouble when there isn't *enough* inductance. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20130814/32c300b2/attachment.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)
