Robert Boschgmbh

Michael Wohlfarth

Manuel Mueller

Miriam Riederer

Alfred Goerlach

Paul Mehringer

Kurt Reutlinger

Sebastian Paulus

Fabio Magini

The invention relates to a method for detecting an error in a generator unit which has an electric machine () with a rotor winding (), a stator winding () transformer-coupled to the rotor winding (), and a rectifier () connected to said stator winding, via which the electric machine () is connected to an onboard power supply () of a motor vehicle, wherein a decision is made, depending on a magnitude of a correlation (K, K) between a curve of an excitation current (I) flowing through the rotor winding () of the electric machine () and a curve of a voltage drop (U, U) on one side of the transformer, as to whether the error is present or not.

Method for detecting an error in a generator unit

A method for determining a speed (nG) of a generator unit which has an electric machine () with a rotor winding () and a stator winding () and a rectifier () connected thereto, via which rectifier the electric machine () is connected to an electrical system () of a motor vehicle, the speed (nG) being determined depending on the plot of an excitation current (IE) flowing through the rotor winding () of the electric machine (). In particular, the speed is determined from a known relationship between the speed, the frequency of the excitation current, the number of pole pairs and optionally the number of phases when there is an error that leads to a constant phase voltage being output.

Method and device for detecting a speed in a generator unit

A rectifier system, e.g., for a generator, includes a bridge system having a predefined number of rectifier elements, at least one rectifier element being a rectifier element having at least one reverse-voltage dependent characteristic curve in a predefined range, and one of the negative diodes having a higher reverse saturation current than the associated positive diode, and at least one of the negative diodes being placed at a location in the rectifier in which the temperature is increased.

Rectifier system for a generator

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Gerlingen, Germany

Michael Wohlfarth