Not even Tesla makes that claim! "We must also remember that, even though the battery-to-wheel conversion efficiency is pretty good (up to 80% or so), the energy makes a full circle back into the battery and it gets converted twice for a net efficiency of at most 80% * 80% = 64%."
http://www.teslamotors.com/blog/magic-tesla-roadster-regenerative-braking ________________________________ From: Lee Hart via EV <ev@lists.evdl.org> To: Electric Vehicle Discussion List <ev@lists.evdl.org> Sent: Tuesday, October 28, 2014 12:52 PM Subject: Re: [EVDL] EVLN: What Click-n-Clack know about regen (?) 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) -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20141028/deea776b/attachment-0001.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)
