No sensor mounted in the transmission will work for regenerative braking. The motor/engine is directly connected to the transmission. The transmission is connected to the differential. The differential allows one wheel to rotate faster than the other wheel. Think about going around a curve. The inside wheel must rotate faster than the outside wheel or the vehicle will slide. This is the purpose of the differential. Any speed sensor mounted in the transmission measures the speed of the motor as ratio of the gearing. It is a fixed ratio. However, because the differential can allow one wheel to rotate faster than other wheel i.e no direct ratio. regenerative braking can cause an instability via loss of traction on one wheel. To prevent this instability, the inverter must know the speed of each wheel and reduce regenerative braking. Now you know why I want to install wheel speed sensors on my Porsche 914.
________________________________ From: Corbin Dunn <[email protected]> Sent: Thursday, February 23, 2017 8:10 AM To: ROBERT Subject: Re: [EVDL] Wheel Speed Sensor Ah! Okay..I haven’t heard of those. It sounds just like my Bug’s speedometer though. I think using speed would work just fine…but there are so many variables, like the type of car, motor, and controller. corbin Il giorno 22 feb 2017, alle ore 8:46 PM, ROBERT <[email protected]<mailto:[email protected]>> ha scritto: Wheel speed sensors are installed at the wheel. The wheel has a tone ring with gear teeth and the sensor reads the teeth as the wheel rotates. It is sometimes called an ABS wheel speed sensor because the ABS brakes use the signal to determine if one wheel is "locking up" during braking. The sensor is also used by the regen braking system to prevent causing an instability. I would like to install sensors on the rear wheel of an EV conversation. ________________________________ From: Corbin Dunn <[email protected]<mailto:[email protected]>> Sent: Wednesday, February 22, 2017 3:34 PM To: ROBERT; Electric Vehicle Discussion List Subject: Re: [EVDL] Wheel Speed Sensor A wheel speed sensor? You found a car without a speedometer? I mean, it is proportional. I removed my tach gauge once I knew what speed produced what RPM. corbin > Il giorno 17 feb 2017, alle ore 9:09 AM, ROBERT via EV > <[email protected]<mailto:[email protected]>> ha scritto: > > Has anyone installed a wheels speed sensor on an EV conversion? I am > referring to a vehicle that was not originally supplied with a wheel speed > sensor. Has anyone connected a wheel speed sensor to an inverter (AC motor > controller)? > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20170217/89cc349b/attachment.htm> > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub [http://www.evdl.org/images/evdl.jpg]<http://www.evdl.org/help/index.html#usub> EVDL Subscription Information and Help<http://www.evdl.org/help/index.html#usub> www.evdl.org<http://www.evdl.org/> About the EVDL: The Electric Vehicle Discussion List, founded in 1991 by EV enthusiast Clyde Visser, is an active and vital source of information and help for people ... > http://lists.evdl.org/listinfo.cgi/ev-evdl.org EV -- Electric Vehicle Discussion List - lists.evdl.org ...<http://lists.evdl.org/listinfo.cgi/ev-evdl.org> lists.evdl.org<http://lists.evdl.org/> The Electric Vehicle Discussion List is a forum for discussing the current state of the art and future direction of electric vehicles (EVs). We define an EV as a ... > Read EVAngel's EV News at http://evdl.org/evln/ EVDL EV News Archive - Electric Vehicle Discussion List<http://evdl.org/evln/> evdl.org<http://evdl.org/> EVLN - EV News Archive Edited by Bruce {EVangel} Parmenter: EVLN: home | help | archive | news | privacy policy | terms of service > Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA) [https://s1.yimg.com/dh/ap/default/130909/y_200_a.png]<http://groups.yahoo.com/group/NEDRA> Yahoo! Groups<http://groups.yahoo.com/group/NEDRA> groups.yahoo.com<http://groups.yahoo.com/> / > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20170223/35de61bb/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)
