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Originally Posted by glassdoctor
How does the controller know what the motor temp is?
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It doesnt, it is a measurement of the internal case temp. of the controller it has no idea what the motors temp is. When the motor is 200f the the controller isnt far behind. The motor heats up the three leads going into the controller which transfers the heat into it. Add this to the heat the controller itself is producing and you have got one hot controller. If you would measure the heat of the case and compare it to the heat of the three solder connections (were the three motor leads are attached to the exposed board sticking out of the controller case) you would see a 20-30f difference.