This mention “but you can perhaps actually get where you plan to go. :-)” Brings me nostalgically back to the old days of range anxiety of short range conversions.
For the last 9 years or so I’ve been driving a Tesla. I conceptually still appreciate the efficiency boost of regen, but these days driving as I do with winter heat at 78 F while driving 80 MPH between plentiful 250kW Superchargers, that anxious egg-foot-driving is old history. It’s such a treat to get to live through this transition to sustainable transportation for everyone and also get back to the lead foot of my youth. ;-) -Otmar, on mobile device. > On Jan 4, 2022, at 1:40 AM, Bill Dube via EV <[email protected]> wrote: > > With an AC drive, there is no excuse not to use regen. It is built in, and > essentially free. At least equipment wise. > > Regen has significant energy losses, however, so you should use it sparingly, > or at least knowledgeably. > > Typical EV drivetrain losses are in the ~15% range, give or take. Whatever > the drivetrain losses, they at least double when you regeneratively brake. > > You first pay that ~15% toll on the way out of the battery, through the > controller, through the motor, and to the pavement. Then you pay the toll > once more pulling that same energy from the pavement, through the motor, > through the controller, and pushing it back into the battery. You basically > pay twice the toll, or perhaps 30%, to recover the energy with regen. You > don't get all the energy back. > > If you drive a bit more conservatively, you can avoid expending that energy > extra energy in the first place, and then recovering that energy, and paying > the regen toll. Not quite as much fun, but you can perhaps actually get where > you plan to go. :-) > > Bill D. > >> On 1/4/2022 2:12 PM, John Lussmyer via EV wrote: >> On Mon Jan 03 15:02:46 PST 2022 [email protected] said: >>>> On 3 Jan 2022 at 12:09, (-Phil-) via EV wrote: >>> For decades EV hobbyists dismissed regen as not worth the extra effort to >>> implement. "Just add another battery or two," they said. >>> >>> That's a pragmatic answer when you've chosen a series DC motor, which is >>> really tough to use for regen. But in fact, under the right circumstances, >>> regen is like leveling out the hills. >> Yup, and it REALLY depends on where you are driving. >> 95% of my trips are here on Whidbey Island. Yes there are hills - but they >> are gentle, and there is only one where I gain a little speed. >> So the only use for Regen is when I stop - and almost all of my driving is >> on a highway with only about 3 traffic lights per trip, which aren't always >> stops. >> >> Regen wouldn't give back very much in my situation. >> >> >> -- >> >> Worlds only All Electric F-250 truck! >> http://john.casadelgato.com/Electric-Vehicles/1995-Ford-F-250 >> >> _______________________________________________ >> Address messages to [email protected] >> No other addresses in TO and CC fields >> UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub >> ARCHIVE: http://www.evdl.org/archive/ >> LIST INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org >> > > _______________________________________________ > Address messages to [email protected] > No other addresses in TO and CC fields > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > ARCHIVE: http://www.evdl.org/archive/ > LIST INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org _______________________________________________ Address messages to [email protected] No other addresses in TO and CC fields UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub ARCHIVE: http://www.evdl.org/archive/ LIST INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org
