Mark Dodrill wrote: [snip] > > Since it is a 6.7" ADC (a bit small for my car), I suspect that I'm having > a lot of electricity turned into heating up the motor instead of having > the motor run faster (since I'm at the upper end of the power/torque it > will do). I'm wondering how I can measure this loss. If I were to measure
A small motor may not be so inefficient as you think. I'm recalling that Mike Slominski's EV Rabbit (which was known to go close to 125 miles on a charge with a 96V pack of Trojan T125s) had a small ~7-in GE motor. Yeah, I know, there were a lot of things that went into making that car more efficient, such as less weight (2700lbs instead of the average 2800-3000lbs Rabbit conversion weight), battery pack all in one big block (so less temperature variation and better pack balance), driving technique, etc. But do recall walking away with the impression that higher voltage on a smaller motor may be better, within thermal capacity limits of the motor. Something about the windings being more fully saturated? Anybody know more about this? Chuck Hursch Larkspur, CA www.geocities.com/nbeaa
