> From: Lee Hart via EV <[email protected]> > > An easy way to get modest "engine braking" style regen is to add a > second small generator, optimized for regen. This can be as simple as > rewinding the stock ICE alternator to work as a high voltage generator.
I have a friend who owns a motor service/rewinding shop. He says it would be cost-prohibative to do so, if you had to pay someone to do it. I think all modern alternators are three-phase "Y" configuration, which is a bummer. A delta-configuration might be simple to get triple the voltage out of. Has anyone had one of these things apart to see how hard they'd be to boost voltage on? > Use the field to control the voltage and current it generates, as usual. > With the field off, the alternator just freewheels. With the field on, > it generates. Simplest case, run the field on your brake light switch, possibly with the help of a relay. I saw one scheme where someone added an electric clutch, as used by air conditioners. But is that really necessary, given Lee's assertion that the field-less alternator has very little drag? > Though automotive alternator efficiency is low, they are capable > generating amazingly large amounts of power for short time periods (like > regen). I have a Nevile-Leece 2kW alternator that came off a fire truck, and am planning to use that for regen braking. :::: We don't have an energy crisis; we have a consumption crisis. -- Ozzie Zehner :::: Jan Steinman, EcoReality Co-op :::: _______________________________________________ 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)
