I am still attracted to the idea of doing away with the gearbox and driving the driveshafts directly.
Seems that the use of two separately excited motors would be the way to go for this.
Main drawbacks could be efficiency and available controllers.
If I could find a series controller that was current controlled then maybe I could just use two controllers (one for main windings and one for field windings).
The other problem would be finding two small enough sepex motors.
There may also be issues with getting the gearing correct. Prob safest to run a toothed belt drive to each drive shaft so that the mechanical gearing can be varied to ensure that the motor runs most efficiently at normal driving speed (maybe 50-60km/hr)
This sounds like a bit more fun on the control side and less just copying everyone else. It also allows work to be done before the vehicle is purchased. The mechanical conversion is probably also easier.
I think that I want two of these connected in series (72v system, 17hp)
http://www.cloudelectric.com/inc/sdetail/1065
sep ex controller
curtis faq (sepex)
packages
http://www.thunderstruck-ev.com/ddmotor.htm
seems fro the general curtis faq that connecting two motors in series should be okay
http://curtisinst.com/index.cfm?fuseaction=FAQ.ListMotorControllers
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