Robert Boschgmbh

Pascal Hiry

Uwe Schiller

Jochen Kurfiss

Gerhard Walter

Antoine Chabaud

Torsten Henke

Stephan Urban

Dietmar Koehler

Tobias Blesch

The invention relates to an electronically commutated electric motor. The electric motor has a stator and a rotor, in particular one formed with permanent magnets. The electric motor has a control unit, which is connected on the output side in particular via a power output stage to the stator and is designed to energize the stator so as to produce a rotating magnetic field. The electric motor has a power output stage with semiconductor switches. The power output stage is connected to the stator via at least one controllable switch disconnector. The control unit is designed to detect a defect of a semiconductor switch depending on a braking torque caused by the defect, in particular a change over time in the braking torque, on a rotor of the electric motor, and to activate the switch disconnector so as to disconnect the defective semiconductor switch from the stator.

Electronically commutated electric motor with defect shutdown

The invention relates to a control device for regulating or controlling a servo-drive unit in a steering system of a vehicle. In order to determine the initial zero position of the steering shaft the value of at least one vehicle state variable is taken into consideration as an input signal, said variable not being a steering angle variable. The steering shaft is in the initial zero position if said vehicle state variable within a defined range of values.

Control device in a steering system of a vehicle

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Vaihingenenz, Germany

Pascal Hiry