Great way to make an electric LSD (Limited Slip Diff) Practically, I fail to see any significant issues. When the vehicle is at speed, there is hardly ever a significant difference in speed between wheels (you can't turn a 90 deg corner at freeway speeds) and if there is a large speed difference it is likely to be the case of a one-wheel traction loss (hitting a patch of sand or an oil leak or aquaplaning or a wet metal surface) so the built-in traction control characteristic of two parallel motors will avoid that one wheel spins freely and the other has no traction at all, as is the case in a normal diff and the reason that when it matters, performance cars have relied on LSD to solve that problem.
Regards, Cor van de Water Chief Scientist Proxim Wireless Corporation http://www.proxim.com Email: [email protected] Private: http://www.cvandewater.info Skype: cor_van_de_water Tel: +1 408 383 7626 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Lee Hart Sent: Thursday, February 07, 2013 4:56 PM To: Electric Vehicle Discussion List Subject: Re: [EVDL] Series and parallel switching On 2/7/2013 1:31 PM, Ds2inc wrote: > In regard to the drag during turning will this apply and/or be as > detrimental if using a motor/4-1 diff/cv/axel/wheel set up?? Yes. Get yourself two PC DC motors. Wire them in parallel. Turning the shaft of one makes it act as a generator, which causes the shaft of the other one to turn as well. If these are really crappy motors, they are so lossy that the second motor might only turn at half the speed of the first one. But if you do this with really good, high efficiency motors, they behave almost like there is a shaft coupling them together. -- Anyone can make the simple complicated. Creativity is making the complicated simple. -- Charles Mingus -- Lee A. Hart, http://www.sunrise-ev.com/LeesEVs.htm _______________________________________________ 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) _______________________________________________ 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)
