Robert Boschgmbh

Stefan Spannhake

Daniel Raichle

Gunther Goetting

Jochen Fassnacht

Dragan Mikulec

Mercedes Herranz Gracia

Hans-Peter Mueller

Alexander Scheidle

Mario Beyer

Stefan Kolmorgen

Yves Challand

A method and a device for operating an electrical machine having separate excitation, especially a synchronous machine. With the aid of a sensor system, a variable characterizing a rotor temperature and/or a stator temperature are/is determined, and an excitation current and stator currents for the electrical machine are specified by a control unit as a function of the variable characterizing the rotor temperature and/or the stator temperature, at least in specifiable operating ranges.

Method and device for operating an electrical machine having separate excitation

A circuit arrangement for de-exciting an excitation winding of a synchronous machine in the event of a fault, including a control circuit for controlling a current flow through the excitation winding, it being possible to apply a positive control voltage to the excitation winding for excitation and a negative control voltage for rapid de-excitation, and including a protective circuit which is parallel-connected to the excitation winding and which does not permit a current flow over the protective circuit in the event of rapid de-excitation and which forms a current path for limiting the voltage and de-exciting the excitation winding if at least one connecting line between the control circuit and the excitation winding is interrupted.

Circuit arrangement for limiting the overvoltage of an excitation winding of a synchronous machine having rapid de-excitation

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Markgroeningen, Germany

Stefan Spannhake