You could always use one of the wheel rotation speed sensors that most cars are fitted with these days as a speed reference.
Sent from my Samsung Galaxy smartphone. -------- Original message --------From: ROBERT via EV <ev@lists.evdl.org> Date: 22/02/2017 23:49 (GMT-05:00) To: Cor van de Water <cwa...@proxim.com>, Electric Vehicle Discussion List <ev@lists.evdl.org> Subject: Re: [EVDL] Wheel Speed Sensor See my previous reply. From: EV <ev-boun...@lists.evdl.org> on behalf of Cor van de Water via EV <ev@lists.evdl.org> Sent: Wednesday, February 22, 2017 4:32 PM To: Electric Vehicle Discussion List Subject: Re: [EVDL] Wheel Speed Sensor I think some vehicles have the speed sensor on the transmission output shaft, since that has a fixed relation to vehicle speed with the diff ratio and wheel circumference. If the transmission is removed, no speed sensing is available until you mount a wheel speed sensor or a pickup on the motor if it has fixed reduction - you can use the latter for the dual purpose of protecting the motor from overspeed if you have a DC series motor and speed sensing. If you have an AC motor, the inverter knows motor RPM and if you have fixed reduction then you can calculate speed. My truck has a very simple relation of motor RPM to speed since it has a transmission that is locked in second gear (fixed reduction) so the motor reaches its 9000 RPM redline at 72 MPH, so every 125 RPM is 1 MPH. 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: Wednesday, February 22, 2017 2:35 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 <ev@lists.evdl.org> 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/20170217/89cc 349b/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/20170223/95b85af8/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) -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20170223/d96f01c1/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)
