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Originally Posted by coolhandcountry
Don't the esc need a feed back from the motor to work. You would need to do something like a sensored for it to work out.
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Yeah, I kinda forgot about that. :dft001: There may be a current-sampling coil or something on the motor wires that picks up the PWM AC signal. The switching frequency and current of the ESC outputs is high, so only a few turns around each lead would be needed. The only other way to pick up a current-sample I can think of is to use a VERY small value resistor and measure the voltage drop. But that would be less efficient, especially at the high currents these ESC can pass. Either way, I suppose re-locating the sampling coils to the outputs of the V/A amp, or calculating a new sampling resistor value to put at the outputs of the V/A amp would work. Then, feeding this data back to the "brain". Unfortunately, I don't have an ESC I can pull apart to see.
MOSFETs are voltage driven, so there would be VERY VERY little feedback from the V/A amp if you counted on them to provide feedback.
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