It's called an IGBT Insulated Gate Bipolar Transistor However a Curtis 1231C has MOSFETS bony IGBTs as far as I know.
Repairing them is not for the novice. They are packed in there tight. I have one I'm not using I would sell. Sent from my iPhone > On Jan 1, 2017, at 12:56 PM, Jay Summet via EV <ev@lists.evdl.org> wrote: > > For those of you following the drama: > > A few days ago my main HV fuse blew. > > I used a lightbulb to test the Curtis 1231C controller and it was able to > control the bulb when I pressed on the throttle, so I thought it might be a > problem with my motor or wires. After I checked out the motor and wires and > everything appeared OK, I put a new fuse in and gave the truck a test drive > after I was able to spin the motor in neutral just fine. > > Everything was fine at low speeds and current (100A or less) but as soon as I > tried to accelerate to 25-35 mph speeds I noticed that my motor was only > getting 300 amps max. In the past I've had it peg my 500 amp meter under > heavy acceleration. > > (This is the point I probably should have let up on the throttle ;>) > > After holding the throttle down for about 5 seconds longer than I should > have, the controller failed completely and I was no longer able to get any > current to the motor. (But I had built up enough speed to coast back home....) > > My guess: > When my HV fuse blew the first time, it was because one or more of the IBGT's > in the controller had fried (shorted I assume, blowing the fuse). > > At some point later, they became "un-shorted" and the remaining controllers > were able to drive the lightbulb and even my motor at low current draws, but > when I tried to use the vehicle at street speeds they became overwhelmed and > then also blew. (At least they did not take out my replacement fuse this > time....) > > I assume it may be possible to repair the controller by replacing just the > IGBT's if nothing else was fried? > > Any pointers on repair procedures? > > (I'm also in the market for a replacement controller, see my other > email...I'm thinking of attempting the repair mostly to have a spare and for > the experience...) > > Thanks, > Jay > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > Read EVAngel's EV News at http://evdl.org/evln/ > Please discuss EV drag racing at 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 Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
