Lawrence, Apparently they looked very well at the Prius as you are describing exactly how the Prius handles regen, although the regen is so mild that it normally does not give a surprise, just a slight feeling of "missing something" when the battery gets to full on a downhill and regen cuts out, making you speed up quicker.
Cor van de Water Chief Scientist Proxim Wireless office +1 408 383 7626 Skype: cor_van_de_water XoIP +31 87 784 1130 private: cvandewater.info http://www.proxim.com This email message (including any attachments) contains confidential and proprietary information of Proxim Wireless Corporation. If you received this message in error, please delete it and notify the sender. Any unauthorized use, disclosure, distribution, or copying of any part of this message is prohibited. -----Original Message----- From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Lawrence Harris via EV Sent: Tuesday, February 28, 2017 7:43 PM To: Electric Vehicle Discussion List Subject: Re: [EVDL] Regen and Smart Cruise Control On my smart ED the regen is a hybrid of these. When you lift the accelerator pedal it will will begin to regen and slow you down. If you feather the peddle you can coast and on some models there is a control that allows you to vary the regen on the accelerator pedal from none to some upper limit. Often on the highway if I am going down hill I press the accelerator to speed up and it just reduces the regen. When you press the brake peddle it will regen more aggressively and slow you down while smoothly engaging the friction braking at some point - I don't normally feel the transition. It does limit regen when the battery is full and that has a weird effect something like having wet brakes, you get use to it but sometimes its a mild surprise. Lawrence > On Feb 28, 2017, at 16:23, ROBERT via EV <ev@lists.evdl.org> wrote: > > Excellent info. This is the method I am thinking of implementing except I will select the regen configuration via the CAN link to the VCU. Does the truck have wheel speed sensors?? I now wonder how the EV1 did regen. > > Thanks for the info. Bob. > > > ________________________________ > From: EV <ev-boun...@lists.evdl.org> on behalf of Cor van de Water via EV <ev@lists.evdl.org> > Sent: Tuesday, February 28, 2017 3:14 PM > To: Electric Vehicle Discussion List > Subject: Re: [EVDL] Regen and Smart Cruise Control > > I have a US Electricar truck (there are also sedans based on the Prizm) > and it has a fully configurable controller. > You can set the max charge voltage (I m using it now with a Leaf pack, > some people have used it with NiCd and NiMH and originally it had a Lead > Acid pack) > > You can also configure the regen control. > Default it uses the automatic shifter positions (since the AC motor has > a fixed ratio to the wheels and does not need a gear shift, just > reverse/forward selection) to give different regen levels. > In normal (Drive) position it does a light regen on throttle up, but > this can be programmed to be zero if so desired or higher... > In [2] it regens pretty hard and it feels like a BMW where you can do > single pedal drive. > In [1] it even simulates a harder regen, I have not yet experimented > with that. > > If you touch the brakes, it ups the regen even more (configurable) > before applying friction brakes later in the pedal travel. > > You can configure at which regen current the brake lights come one as > you may hardly ever touch the brake pedal again if you like the [2] gear > setting > > I am enjoying this 1994 marvel of engineering.... > > Cor van de Water > Chief Scientist > Proxim Wireless > > office +1 408 383 7626 Skype: cor_van_de_water > XoIP +31 87 784 1130 private: cvandewater.info > > http://www.proxim.com > Proxim - Wireless Broadband, Backhaul Solutions and Access ...<http://www.proxim.com/> > www.proxim.com > Proxim Wireless offers licensed and unlicensed point to point, backhaul, bridge, point to multipoint, wireless broadband and wireless access points. > > > > This email message (including any attachments) contains confidential and > proprietary information of Proxim Wireless Corporation. If you received > this message in error, please delete it and notify the sender. Any > unauthorized use, disclosure, distribution, or copying of any part of > this message is prohibited. > > > -----Original Message----- > From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Corbin Dunn via > EV > Sent: Tuesday, February 28, 2017 9:54 AM > To: ROBERT; Electric Vehicle Discussion List > Subject: Re: [EVDL] Regen and Smart Cruise Control > > >> Il giorno 27 feb 2017, alle ore 4:22 PM, ROBERT via EV > <ev@lists.evdl.org> ha scritto: >> >> I noticed a series of e-mails on regen and smart cruise control. > These two topic are closely related. I have been looking at > implementing regen on an AC motor controller. I found that designing an > AC motor controller in simple comparison to selecting the best regen > implementation. There are two typical methods for regen. If you > release the accelerator then start regen. If you depress the brake then > start regen. Tesla and Nissan use the first method. > > Tesla uses a different method; you must partially depress the throttle > pedal to coast (zero power and zero regen). Regenerative braking gets > progressively stronger as you lighten up off the pedal. It does full > regen when your foot is off the pedal. > >> Some other companies use the brake depress method. The main > advantages of the release accelerator method is fewer components and it > is simpler. The disadvantage is with cruise control and down hill and > then up hill. For in town cruise control, it works OK. The brake > depress method solves the down hill/up hill problem; however, you do not > get as much regen capacity because at some point the mechanical brake > must be enabled. Added to the complication is the sequence of firing or > not firing of the IGBTs. There are numer >> ous technical articles is the SAE journals and electrical journals > proposing IGBT firing sequences that produce better regen. All > manufactures are trying to extend the range of their vehicles. At > present, improvements in inverter and component design provide less than > a percent or two of efficiency improvement. Regen is a hot topic because > a good regen implementation could add 10 plus percent in range. At > present, recoverable energy from regen in 20 - 30 %. A smart system > that could use GPS data, road map data, traffic light data and AI > programming could recover a huge amount of energy. If you check current > technical literature, you find that car manufacturers are working on > this type of system. I am interested in is what current EV do? Is > fully charging a battery not allowed so that regen can always happen? > > In a Tesla, it isn't prevented. > >> Is regen modified when the brake paddle is depressed? > > In a Tesla, it isn't modified when the brake pedal is pressed. It is > purely with the throttle pedal. > >> Under what situations is regen disabled? > > Regan is disabled, or the max regen amount is limited, when the battery > is fully charged or cold. > >> Do all EV have a regen disabled light? > > All EV's don't. > >> Do all EV have a regen d >> isable switch? > > No - the Tesla does not have a switch to disable regen. Hybrids, like > the Prius also do not have the ability. > > corbin > >> Which EVs only use release of accelerator method? Does regen adaptive > based on similar trips? The questions are numerous. >> >> -------------- next part -------------- >> An HTML attachment was scrubbed... >> URL: > <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20170228/15bb > b0e2/attachment.htm> >> _______________________________________________ >> UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub >> http://lists.evdl.org/listinfo.cgi/ev-evdl.org >> Read EVAngel's EV News at http://evdl.org/evln/ >> Please discuss EV drag racing at 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 > Read EVAngel's EV News at http://evdl.org/evln/ > Please discuss EV drag racing at 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 > Read EVAngel's EV News at http://evdl.org/evln/ > Please discuss EV drag racing at 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/20170301/fc0f 930c/attachment.htm> > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > Read EVAngel's EV News at http://evdl.org/evln/ > Please discuss EV drag racing at 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 Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at 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 Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
