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Personally I don't think it's a good idea to over voltage DC motors
especially when they are loaded as the extra current can burn out the fields and
armatures. It's easy enough to PWM hi efficiency 'H' bridges to reduce the
voltage very efficiently. I like the HIP4081, it's an old chip but I've
had very good success with it. (it doesn't hurt that I have a bunch of them
either!) I may even use it to control the main drive motor.
Has anyone built their own controllers? I'd love to see the circuits.
Rob |