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You can also just run the motor at a lower voltage than it's rated for, without rewinding it. It can have the same torque at lower rpms. I was talking to Fran about that a couple days ago. You could run a motor rated for 220v at 10v if you wanted (OK OK performance would suffer some, but you can do it).
Hey mrbigh! I'm working on the software right now. There are quite a few formulas involved, and a little chip with only fixed point math is what has to do all the sin, cos, sqrt(3), and multiplication stuff. I'm also getting the A/D converter working.
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