There are multiple benefits to regen that are not obvious: Battery discharge voltage is higher and battery is thus more efficient after a burst of regen current. In addition, depth of discharge is reduced for a given route leading to slightly longer battery life. These are marginal, but interesting aspects of regen.
George Swartz > Paul Dove via EV wrote: >> You get no where near that much energy back. 5% on average. > > 5% is roughly the amount of range extension that regen provides. It can > be more if you make very frequent stops (like a delivery vehicle), or > live in a very hilly area. Otherwise, you don't use the brakes enough to > get more than a few percent of the energy you're using to drive. > > But the peak regen current can easily be 100s of amps (during the brief > time that you are braking). Most controllers that can do regen can > deliver about the same amount of regen current as they can motoring > current. > > Note that when you *do* get 100's of amps of regen current, you are > decelerating very fast! I had an EV with a 500 amp aircraft > starter/generator as its motor; it would easily deliver over 500 amps of > regen. But when it did, you'd better be on dry pavement or it would skid > the tires! > > -- > A designer knows he has achieved perfection not when there is > nothing left to add, but when there is nothing left to take away. > -- Antoine de Saint Exupery > -- > Lee Hart's EV projects are at http://www.sunrise-ev.com/LeesEVs.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) > > _______________________________________________ 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)
