IF I recall from some of earliest physics lessons, whenever force is transferred in any direction, there are losses, usually expressed in the form of heat (which often requires cooling and lubrication (think 90 weight here)). These losses become more extreme in ring & pinions (90 degree transfer), and less extreme in manual transmissions side by side gear to gear transfer. Most transaxles are a combination of these concepts, whereas the hub motor typically has one (side by side gear to gear). -Tom
On Tue, Dec 24, 2013 at 8:55 AM, Peri Hartman <[email protected]> wrote: > Let's say one could solve the problems of an in-wheel motor. Then, how > much > advantage would it have over using some sort of transxle and mounting the > motor the chassis a little inwards from the wheel area. > > The only advantages I can think of are: > - slightly less space used since the motor would be almost completely in > the > wheel well area, > - ever so slightly less weight and resistive loss (no transaxle). > > Peri > > -----Original Message----- > From: [email protected] [mailto:[email protected]] On > Behalf > Of Bill Dube > Sent: 24 December, 2013 7:44 AM > To: Electric Vehicle Discussion List > Subject: Re: [EVDL] VW Bora will have Protean in-wheel motors > > I agree. Every car manufacturer has boldly announced in-wheel motors, > built a prototype, and then made an embarrassing retraction. > > Sounds like a terrific idea, then they build one and learn for > themselves the insurmountable safety issues of highway driving > (uncommanded asymmetric torque, unacceptable unsprung weight, etc.), > then as quietly as possible they bury all the prototypes and pretend it > never happened. > > I wish they would publish a book or report on the bad experience, but I > guess it is just too embarrassing. > > Bill Dube' > > On 12/23/2013 9:28 PM, Al wrote: > > Sigh, in-wheel motors, again, when will they learn. > > > > ----- Original Message ----- From: "brucedp5" <[email protected]> > > To: <[email protected]> > > Sent: Monday, December 23, 2013 8:11 AM > > Subject: [EVDL] EVLN: VW Bora will have Protean in-wheel motors > > > > > > _______________________________________________ > > 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) > > > > _______________________________________________ > 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) > > -- Remember, it is not that the glass is half empty, in reality, the glass is merely twice the size that it needs to be! -TNT'82 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20131224/ac119ee6/attachment.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)
