On Mon, Mar 25, 2013 at 2:45 PM, EVDL Administrator <evp...@drmm.net> wrote:
> In any case, many manufacturers are looking for alternatives. This is > probably a good thing. I love efficiency. However, I also recognize that > it's better to have a slightly less efficient EV that lots of folks can > afford, than a more efficient one that doesn't sell because it's too > expensive. I frequently hear/read about PM motors being more efficient, but then someone points out that a simple efficiency number is not the whole story. They have very high peak efficiency, but at low power it drops off - to a lower figure than a wound field motor at low power. Since most EV motors operate at a power level well below peak, your overall efficiency might be higher than a PM motor. Add the fact that wound field motors can make monster low end torque, and I'm not too worried about the high cost of rare earths for motors. Chris LeSled is for sale! http://www.evalbum.com/274 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20130325/8594fbf9/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)
