Steve Clunn via EV wrote: [lots of really good seat-of-the-pants info!]
I'm no expert, either. I know there are some real experts out there, and was hoping they'd chime in. The NEDRA racers in particular have really pushed these motors to the limits. They know lots of ways to break them, and also ways to make them hold together, at least for 1/4 mile trips! :-)
We really can't talk about the Voltage across the motor without talking about RPM and Amperage... So, the question needs a little more information...
We also need to keep in mind that the Maximum RPM of these motors is below 7000. Even 72V will make one of these motors fly apart if there is no load on it.
That's for sure! Even 36v can do it, if it's already hot. Never run a series motor with no load!
the Controller is converting battery Voltage into Motor Amperage. So a 300V battery pack is no problem as long as you have a PWM controller.
...and that your controller is programmed to limit motor voltage to around 160v maximum. The higher-end controllers can be programmed to limit motor voltage. Low-end controllers don't usually have this feature (but they probably won't support a pack voltage higher than 160v anyway).
If you are just worried about your battery pack voltage being too high for your motor, maybe you need to re state your question and give more information on what batteries you have, what controller.
Yes! The motor and the controller are a "team" that have to work together if both are to survive.
-- Ingenuity gets you through times of no money better than money will get you through times of no ingenuity. -- Terry Pratchett -- Lee Hart, 814 8th Ave N, Sartell MN 56377, [email protected] _______________________________________________ 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)
