It's a little reminiscent of one failure mode in the old PMC (pre-Curtis) controllers. The circuit that derived the logic voltage from the traction battery had an undersized power resistor. If it opened, the logic voltage would go low, making the controller think the battery was flat. The controller would be stuck permanently in "turtle mode" where it would limit current to something really low, like 20a or 50a. You could move the car round your driveway at crawling speed if you were lucky, but that's about it.
I don't remember that that condition could be reset by power-cycling the controller, however. Here's a wild, irresponsible guess from a non-engineer : something that should be heatsinked isn't; or, it's just getting hotter than it should be. When it heats up, the controller realizes that, and - to protect itself - either shuts down or knocks the current limit way down. I'll sign off now and let the folks who actually know something have at it. David Roden EVDL Administrator http://www.evdl.org/ _______________________________________________ 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)
