On May 18, 2015, at 11:56 AM, Lee Hart <leeah...@earthlink.net> wrote:
> Ben Goren via EV wrote: >>> The URL posted for the car indicates that the hub motor(s) are sprung. >> Huh? How on Earth is _that_ supposed to work? > > One way is to have a long shaft on the motor. It acts like a swing axle, like > the old VW Beetles. The motor itself is mounted so it can pivot, or has a > universal joint between it and the axle. > > Another is to have a gear-, chain-, or belt-reduction between the motor shaft > and the wheel. The motor mounts to the vehicle chassis, and the wheel is free > to move up/down on a trailing arm (that also houses the reduction unit). Are any of those considered hub motor designs? I've never, for example, heard of an aircooled VW as an hub motor vehicle. > Another is that they have an axial flux motor design, where the stator can be > attached to the car chassis, but the rotor can move up/down with the > suspension. Sounds like either a recipe for disaster or an impossible design. You've either got no room for travel between stator and rotor and the two catastrophically collide the first time you run over a pebble, or else you've got an huge gap between the two with some sort of magnetic levitation keeping the wheels attached to the car and also somehow spinning. > Still another possibility is that the reporter is mistaken. Sounds like the answer.... b& _______________________________________________ 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)
