Conti Temic Microelectronic Gmbh

Brose Fahrzeugteile Gmbh&co.kg, Hallstadt

Juergen Groth

Thomas Just

Armin Farrenkopf

Heinz Ewinger

Thomas Dorner

Heiko Engelhardt

A method and a control device operate a three-phase brushless direct current motor with phase windings that are fed by an inverter connected to a voltage source having a high potential and a low potential. The semiconductor switches of the inverter are arranged in a bridge circuit and are controlled such that current always flows through two phase windings during motor operation. The motor is operated with normal commutation when the rotational speed is greater than or equal to a minimum rotational speed, wherein the angles are shifted by 60&#xb0;. During start-up operation, up to the minimum rotational speed, a high-potential-side commutation angle of a phase winding is shifted toward a low-potential-side commutation angle of the phase winding by an angle greater than 0&#xb0; and less than or equal to 60&#xb0; with respect to the normal commutation.

Method and control device for operating a three-phase brushless direct current motor

To avoid damaging the electrical braking system of a motor vehicle due to driving with an applied parking brake, the parking brake is automatically released, if the speed of the motor vehicle exceeds a prescribed minimum value, and the drive unit of the motor vehicle is driven in a specific operating state, and at least one operating element (e.g. gas pedal, gear shift lever, clutch pedal, safety belt, etc.) of the motor vehicle has been actuated by the driver of the motor vehicle. Sensor signals of sensors that sense the state of the above parameters are subjected to a plausibility check.

Method for operating a motor-driven vehicle

Method of operating a braking system of a parked motor vehicle

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Nuremberg, Germany

Juergen Groth