[Serum]

that slowing down/braking is discussed quite some tim ago. I wrote that it used the low internal resistance of the batteries to slow the car down. I remember i didn't made friends with that post.

almost everybody seemed to disagree.

another thing about sensorless controllers; the way they start varries;

I read an article on a DIY brushless controller that the controller starts at a lower set sampling frequency in order to start the motor, once it sences its EMF it changes the sampling frequency and takes it to another level. Interesting stuff; the sampling frequency would affect the timing?

A theory of myself;

Some controllers just put out a certain RPM (fixed) to start the motor (MGM/Mambamaxx) there is no way the motor will turn bellow a certain RPM; they simple use this to reduce cogging. It doesn't look at EMF, it just starts at ~120rpm or so.

i think this is done, because the EMF is hard to measure for controllers on lower RPM, and the electric magnetic field might jump over the actual rotorspeed (this results into cogging)

There is another thing that affects the heat of the esc Brian;

the quality of the sign-wave. If this is an incorrect signal, with saw-tooth effect on high mark of the signal, this results into heat as well. The FETT tries to follow the steering signal (which is obviously amplified as well)