Lawrence Harris wrote: > Keep in mind that if you have just gone up a long hill the motor and > commutator will be hot and over-speeding it on the downhill run may still > damage it even though the current is now low (or zero). I think it's > probably best to keep the RPM in the safe range under the worst conditions > rather than risk the expense of a damaged motor.
Dennis Miles wrote: > > > David, and others, the most fragile part, of a series DC motor, is the > > commutator. And, bear in mind that the original poster is considering the AC-51 motor, which is AC, not brushed DC, and so has no commutator to worry about. If I were the OP, I'd still want HPEVS to provide some max safe RPM value, not just a verbal statement that the 8000RPM limit is a controller limitation and not a limitation of the motor. Roger. _______________________________________________ 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)
