at the turning point in time wp of the rotor movement the expected maximal velocity is exceeded comparison of the actual path ib established on the basis of the regulation for the rotor angle characteristic with the predetermined setpoint path sb on the basis of which the rotor angle specifies an increased motor power consumption and or torque output on the basis of the error laden and already before the turning point in time wp in the time range b 1 fig2 c depending on the size of the deviation of at least one of the two state variables rotor angular velocity motor power consumption and or electric motor torque delivered from the respective setpoint value of the state variable a correction value for equalizing the prevailing error is determined to do so the setpoint path to be corrected and or the distance sensor value to be corrected is are subject to a correction factor multiplication and or an offset addition by analogy with fig2 a c fig3 a c illustrate the case in which the rotor of the electric motor 4 does not reach the desired setpoint end position because of an error laden distance sensor signal s error of a smaller extent u2014 within a predetermined first deviation range owing to a prevailing error laden distance sensor signal s it is suggested to the regulating device 20 that even before reaching the desired rotor end position.