Method for controlling an electric tool with an electronically commutated electric motor

摘要

The invention relates to a method for controlling an electric tool provided with an electronically commutated electric motor. The method comprises the steps of: (a) generating a pulse width modulated signal whose duty cycle ratio can be varied for controlling the speed, (b) starting the electric motor for a first pulse duration (48) with a reduced duty cycle ratio of less than 100%, preferably with a minimum duty cycle ratio, (c) the duty cycle ratio is raised for a subsequent pulse duration, provided that the electric motor (20) over a certain period of time (50) has not moved.