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)
