[mharvey]

Originally Posted by Woodsmith

Wouldn't a small shunt motor do that?

Shunt motors will hold rpm and demand current to achieve that.
A small shunt motor, with a contactor for on/off, to drive the AC, PS and vacuum pumps at their ideal speeds and the traction motor to just deal with traction.

I've also been tinkering with the idea of using a Prius Compressor. Just need a DC/DC to step up the voltage. I've heard of other folks doing this. Anyone tried it?