FP motor differences

[Al Skierkiewicz]

Originally Posted by Rob

The 9003 and 9012 motors are almost identical in performance, but they have a notable design difference. The 9012 motor has a current limiter built in (I think it is a thermistor, but I'm no electrical guy) that limits the current under high loading conditions. The 9003 motor does not have this feature.

The current limit is a thermal breaker. It will open when it achieves a certain temperature. This will occur by the passing of a high current or from external/internal heating from the motor and surroundings. Once it has reached trip temperature and cooled, it is more likely to trip again. Many teams experienced this phenomena during arm build and test this year.