Hey Henning,

I am not referring to PWM frequency. I am talking about the frequency that the controller has to use to change the magnet field fast enough to keep up with the magnets in the motor rotating past the motor winding.

If a motor spins at 30,000 rpm, and it has 14 poles, then this commutation frequency is: 30,000*14/60 = 7,000 hz, or 7khz.

This why the PWM frequency needs to be set at 16khz when the ESC is driving the Pyro 600 motor.

Brenner ...