"/Ok, new thread. What is the ideal regen?/" I think the Curtis controllers permit a good approach. You can have regen off the accelerator pedal, and the software permits you to limit how much as a function of motor rpm. You can also have regen off the brake pedal, using similar "brake map" parameters. HPEVS sets up their vehicles with both, moderate regen with accelerator, aggressive regen with hard braking. Seems like a nice way to set it up. Of course regen current is limited to prevent battery pack voltage from exceeding the User_Overvoltage level set in the software. I have this set at 124.8V in my car, 3.47V/cell. I've only had it trigger a couple times. If I am as little as 5Ah (97% SoC) below full charge it does not trigger, even on a fairly aggressive deceleration.
Also, I use the full 5V of my Hall throttle. You can set it up to define about any voltage as full throttle. If you set it at say 3V, then the throttle is more touchy - more like some ice vehicles where if you just touch the throttle the car jumps. If set up this way you will have a difficult time holding regen at 0% to coast, and you will over and undershoot while driving so that you slow a bit more than you wanted, accelerate a bit more than you wanted, then have to correct. This of course results in somewhat lower efficiency. Using the full 5V I don't have this issue, but the pedal would likely feel a bit mushy to someone used to an ice, since you have to press it a bit further to get a typical acceleration rate. -- View this message in context: http://electric-vehicle-discussion-list.413529.n4.nabble.com/EVLN-Fiat-500e-EV-close-to-perfect-tp4668392p4668584.html Sent from the Electric Vehicle Discussion List mailing list archive at Nabble.com. _______________________________________________ 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)
