Good point. It is very hard to hold onto metal above 70degC. I would bet the max temp to be much higher than that. Also if you are concerned why not duct air to it? In days way passed, we used 3" ducting on the cars we raced to cool the brakes. It is very affective.
Mark Grasser -----Original Message----- From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of damon henry via EV Sent: Thursday, September 10, 2015 12:53 PM To: EV List Subject: Re: [EVDL] hub motor cooling ac motor You are assuming that just because you cannot touch it the temperature is a problem. That is not necessarily true. Do you have any specs that specify acceptable operating temperatures? damon > Date: Wed, 9 Sep 2015 18:41:10 -0400 > To: ev@lists.evdl.org > Subject: [EVDL] hub motor cooling ac motor > From: ev@lists.evdl.org > > When hill climbing roads at 25 mph and 40 amps, which it draws same > amps at 40 mph on the flat . on my 3 kw wheel, it starts heating up > to the point of be not touchable . I thought of drilling a very small > hole 1/8 inch near the axle and fill the inside maybe 25% . but don't > know what kind of oil that'd not hurt wrirng etc. or would a high > wattage motor help ? > > _______________________________________________ > 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) > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20150910/7a4e2cc4 /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) _______________________________________________ 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)
