Robert Boschgmbh

Armin Niederer

Sebastian Paulus

Gerhard Knecht

Michael Koerner

Thomas Huck

Tarek Mili

Stefan Hornung

Diyap Bueyuekasik

Lars-Dirk Anding

Tobias Kuechen

Marco Krauth

Linh-Thao Stubenbord

Andrea Ganter

Determining the rotor angle of a synchronous machine. In one aspect, the invention provides a method that includes generating a multiplicity of pulse-width-modulated drive signals for the phases of an inverter feeding the synchronous machine depending on a voltage to be fed into the synchronous machine, and applying a first phase shift to one or more of the multiplicity of pulse-width-modulated drive signals, so that the duration of the switching states of the inverter is extended in order to generate a first switching pattern for the phases of the inverter. The method also includes applying a second phase shift to one or more of the multiplicity of pulse-width-modulated drive signals for generating a second switching pattern, selecting one or more of the first and second switching patterns, determining one or more of neutral point potentials at the neutral point of the synchronous machine, and calculating the rotor angle of the synchronous machine.

Control device and method for determining the rotor angle of a synchronous machine

A method for determining the rotor angle of a synchronous machine. In one implementation, the method includes generating a multiplicity of pulse-width-modulated drive signals for the phases of an inverter feeding the synchronous machine depending on a voltage to be fed into the synchronous machine, changing the pulse width modulation frequency of at least one drive signal of the multiplicity of pulse-width-modulated drive signals, with the result that the duration of the switching states of the inverter in which an active voltage phasor is output is extended in order to generate a switching pattern for the phases of the inverter, driving the inverter with the generated switching pattern, determining one or more of neutral point potentials at the neutral point of the synchronous machine during driving of the inverter with the switching pattern, and calculating the rotor angle of the synchronous machine depending on the determined neutral point potentials.

The invention relates to an electric motor () and to a method for producing said electric motor, especially for adjusting mobile parts in a motor vehicle. Said electric motor comprises a collector (), arranged on an armature () and electrically contacted via hammer brushes (). The armature () is surrounded by a lower housing part () and an upper housing part () which can be assembled in a radial direction () in relation to the armature (). The hammer brushes () comprise one fastening element () each which engages directly in a seat () of the lower or upper housing part ().

Electric motor with hammer brushes

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Karlsruhe-Rueppurr, Germany

Armin Niederer