I happen to have an extra AGM battery available, that I can put in line and see if a higher voltage affects it. according to the spec sheet for the AXE 7245 its max voltage is 90 volts, so 7 batteries in series should be just under that if I let them rest a little after charging before connecting it up. I am also going to try to wire up a motor ammeter and voltmeter and see what that that side of the circuit is doing...
Z On Wed, Aug 28, 2013 at 4:33 PM, EVDL Administrator <[email protected]> wrote: > On 28 Aug 2013 at 16:05, Zeke Yewdall wrote: > > > Batteries are staying around 61 volts under load. ...Is it possible > > that [the controller is] reducing current because of battery sag and > > not just controller temp? Does the alltrax have a cutback for > > battery voltage that you can program? > > I have old AXE and DCX manuals here. As part of their description of the > diagnostic LED. they both refer to a battery undervoltage shutdown. Both > say > the error LED will give you 6 red blinks in that condition. > > It's not clear from the manuals whether battery voltage is checked only at > startup, or whether the controller monitors battery voltage and shuts down > or cuts back on sag during operation. > > That said, I think it would be likely. Even the old PMC and Curtis > controllers did that 25-30 years ago. They would back down the battery > current limit to 50 amps if the battery voltage sagged to around 1.75vpc at > their minimum nominal voltage. That is, if you had a 72-96v Curtis, it > would cut back at a battery load voltage of around 63 volts. > > You might contact the folks at Alltrax - or your dealer - and ask. Or > maybe > you could try adding an extra battery as an experiment. > > 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) > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20130829/545792cf/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)
