Abstract: The invention relates to a method and a device for automatically adjusting the commutation angle ? of a brushless electric motor, the electric motor being driven by an electronic motor controller based on an open loop control and using a variable commutation angle ?. According to the invention, the following steps are performed repeatedly: Measuring the actual rotational speed ? of the electric motor; Comparing the actual rotational speed with a previously ascertained and stored rotational speed ??old, Increasing the commutation angle ? by a given value ??, should ?>??old; or Decreasing the commutation angle ? by a given value ??, should ?<??old; and Storing the actual number of rotations ? as a new value ??old.