Robert Boschgmbh

Seg Automotive Germany Gmbh

Michael Herz

Helmut Suelzle

Gert Wolf

Thomas Koss

Andre Micko

Egon Reisz

Xaver Laufenberg

A device for minimizing the current consumption of a motor vehicle generator from the battery during the starting phase of a motor vehicle, has a generator unit and a generator regulator. The generator regulator includes a regulator control, which has a unit for providing a first control signal having a fixedly specified pulse duty factor, a unit for providing a second control signal having a pulse duty factor that is a function of the excitation current, and a unit for selecting the control signal having the smaller of the two pulse duty factors, which is supplied to the output stage of the generator regulator as the control signal.

Device for minimizing the current consumption of a motor vehicle generator from the battery during the starting phase of the motor vehicle

A dip in the output voltage of a motor-vehicle alternator, owing to a connecting of a load or a change in speed, is compensated with the aid of an alternator regulator which provides a control signal that has a duty factor and increases the excitation current of the motor-vehicle alternator. After the occurrence of the voltage dip, in a first step, the duty factor of the control signal is increased by a differential amount, and in a subsequent second step, the rate of correction is limited. After the occurrence of the voltage dip, parameters describing the instantaneous working point of the motor-vehicle alternator are determined, and in the first step, the differential amount is set as a function of the working point.

Method and device to compensate for a dip in the output voltage of a motor-vehicle alternator

A device for detecting a change in a generator output signal of a vehicle generator includes a window comparator for comparing a signal amplitude of the generator output signal to at least one threshold value which limits a signal amplitude range, a detector for detecting a change in the generator output signal based on an output signal of the window comparator, a detection unit for detecting a signal amplitude difference between a maximum signal amplitude and a minimum signal amplitude of the generator output signal, and an adaptation unit for adapting the signal amplitude range of the window comparator, based on the signal amplitude difference, when there is the change in the generator output signal.

Device for detecting a change in a generator output signal of a vehicle generator

A generator device with a generator regulator and a generator unit having a generator and a rectifier arrangement. The generator regulator has an operating voltage connection and a phase voltage connection. Furthermore, if during a control intervention of the phase voltage the DC voltage applied to the operating voltage connection exceeds a predefined limit for a predefined period of time, the generator regulator deactivates the control intervention of the phase voltage.

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Stuttgart, Germany

Michael Herz