Patent ID: 8433538

Claim:
A method for use with a magnetic wheel of an electromotive drive of a vehicle, the method comprising: moving an electric actuation unit by means of the electromotive drive, generating a pulse by means of a sensor system, which interacts with a magnetic wheel attached to the rotor shaft of the electromotive drive, having adjacent sectors, forwarding of the pulse to an evaluation unit, calculating the motor-rotation speed in relation to the sector of the magnetic wheel assigned to the pulse according to the relationship ω i =k i /T i , where k i is a correction factor and T i is a the time interval between the forwarded pulse and the preceding pulse, storing the calculated motor rotation speed and an associated sector index in a ring buffer memory, detecting the minimum and maximum motor rotation speed stored in the ring buffer memory and the associated sector index in each case, and adapting the correction factor assigned to the sector with the detected minimum motor rotation speed, and adapting the correction factor assigned to the sector with the detected maximum motor rotation speed.