Perhaps we should go back to the basics here...Dan tells us that everything worked fine for 2 years (seasons), then he burned up 2 motors, the 2nd one almost immediately. This leads me to think that there is a new problem with the drive function, creating a large amount of drag. I would be looking for a locked up brake (or in this case of a seized bearing), that might cause of this. As for the idea of breaking in the new brushes, I agree that it is essential. We always ran each motor for at least 12 hours on a 12V battery before putting it under full voltage loads. In direct drive cases, this meant pulling the motor and doing it on the bench.
Just my 2 watts worth, Tom On Sat, Feb 21, 2015 at 7:13 PM, EVDL Administrator via EV < [email protected]> wrote: > On 21 Feb 2015 at 21:09, Dan Baker via EV wrote: > > > I still have some to do's like getting some thermal monitoring > > in place for both motors and some ammeter monitoring like a Cycle > Analyst. > > Will a CA handle that kind of current? I thought it was for e-bike level > currents. Or can you put a bigger shunt on it, maybe a 10x or 100x? > > How about something old-school and rock solid like this? > > http://www.kta-ev.com/Westberg_Ammeter_A2C6_30_p/wes-a2c6-30.htm > > Requires a shunt : > > http://www.kta-ev.com/Deltec_Shunt_500A_50mV_p/mkb-500-50.htm > > No endorsement implied, that's just who had nice pictures and descriptions. > Warning : KTA is in the process of closing their business. > > David Roden - Akron, Ohio, USA > EVDL Administrator > > = = = = = = = = = = = = = = = = = = = = = = = = = = = = = > EVDL Information: http://www.evdl.org/help/ > = = = = = = = = = = = = = = = = = = = = = = = = = = = = = > Note: mail sent to "evpost" and "etpost" addresses will not > reach me. To send a private message, please obtain my > email address from the webpage http://www.evdl.org/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) > > -- Remember, it is not that the glass is half empty, in reality, the glass is merely twice the size that it needs to be! -TNT'82 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20150222/ecf75b90/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)
