Continental Automotive Gmbh

Continental Automotive Technologies Gmbh

Christian Gunselmann

Bogdan Budianu

Michel Parette

Frank Sader

Mathias Fernengel

Andreas Donner

Christoph Förster

Nicolas Bruyant

Lionel Guichard

Alexander Rodatos

Nils Horstmann

Farid Abedini Bayghra

Roman Katchan

Lukas Jung

Scott R Smith

Albert Cimpoesu

A method for operating a vehicle brake system, wherein the brake system has at least one friction brake and at least one regenerative brake. A defined switching pattern is specified for switching between a self-cleaning operating mode for cleaning the friction brake and a normal operating mode of the brake system. The method includes determining information describing the state of the at least one friction brake, determining the state of the at least one friction brake from the information, determining whether the state satisfies a specific switching criterion, and, if the self-cleaning operating mode is to be activated according to the switching pattern and the state of the friction brake does not satisfy the switching criterion, suppressing activation of the self-cleaning operating mode and maintaining the normal operating mode.

Method for operating a vehicle brake system, and brake system

A method for identifying an error state in a brushless direct current motor. For the purposes of this identification, an angle deviation between a shaft angle and a control angle is calculated and used to identify error states on the basis of characteristic patterns. This also works, in particular, for slowly-rotating or stationary brushless direct current motors and allows a clear reduction in the calculation capacities required, compared to the prior art.

Method for identifying an error state in a brushless direct current motor

A method for operating a brushless electric motor, the windings being energized by an inverter with the aid of six switches. A detection unit for detecting defective switches, a unit for measuring voltage at the outputs of the inverter, and a microcontroller for controlling the switch and for generating a pulse width modulated voltage supply for the windings are provided. A short-circuited switch causes a torque in the electric motor opposite the actuating direction of the electric motor. The method proposes that after detecting a short-circuited switch, the windings (U. V. W) are energized to generate a motor torque that is, on the whole, positive. An actuating period of the electric motor is divided into a plurality of sectors, wherein, in accordance with the defective switch, individual sectors are deactivated for the actuation of the windings (U, V, W), while other sectors are used to actuate the windings (V, W).

Method for operating a brushless electric motor

The present invention relates to a method for operating a brushless electric motor whose windings are driven by an inverter with the aid of six switches, having an identification unit being provided in order to identify defective switches, a unit for voltage measurement at the outputs of the inverter, and a microcontroller for controlling the switches. Particularly in safety-relevant applications, it is important to quickly determine what characteristic the defective switch has, for example in order to continue to operate the electric motor in an emergency mode, or to switch it off immediately. The defect (F, F, F) is traced and the nature of the defect (F, F, F) in a switch determined by using a different voltage (PWM, PWM) to drive those windings (V, W) which are not associated with the defective switch, while a voltage measurement is carried out on the winding (U) associated with the defective switch.

Method for operating a brushless motor

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Wuppertal, Germany

Christian Gunselmann