Robert Boschgmbh

Michael Koerner

Frank Fischer

Stefan Koch

Nikolas Haberl

Sebastian Paulus

Gerhard Knecht

Volker Lurk

Christian Poddey

Tobias Stiefel

Armin Niederer

Norbert Knab

Gerald Roos

Oliver Gerundt

Markus Feigl

Ingo Drewe

Armin Stubner

Patric Kahles

Hans-Peter Dommsch

Norbert Martin

Stefan Demont

Thomas Malich

Lucas Durix

Jan Van Goethem

Daniel Hofacker

Fengmei Cheng

Jihad Bsul

Jean-Luc Augier

Chris Cummaudo

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 having a stator and a rotor. The electric motor also comprises a controller, wherein the controller is connected to the stator and/or rotor, and is designed for applying current to the stator and/or rotor for rotating the rotor. According to the invention, the controller comprises a pulse width modulator designed for controlling a power output of the electric motor, in order to generate a predetermined number of different current application patterns. The current application patterns each represent a power output of the electric motor, and preferably comprise a time sequence of current pulses, each having a current pulse duration. The controller is designed for applying current to the electric motor according to at least two different current application patterns for actuating the electric motor during a time interval of actuation, such that a power output of the electric motor in the time-based average of the time interval of actuation, in particular from the beginning to the end of the time interval, is different from the power outputs represented by the current application patterns in the time interval of actuation.

Electric motor having a pulse width modulator

The invention relates to a method for detecting blocking or sluggishness (M, M) of a DC motor (). The method comprises the following steps: applying a voltage pulse (U=O) to the DC motor (); monitoring a motor current (I) flowing through the DC motor (); detecting a maximum value of the motor current (I) following the application of the voltage pulse; checking whether a change in the motor current (I) after reaching the maximum value exceeds a specific amount; signalling the blocking or the sluggishness (M, M) of the DC motor () if the change in the motor current (I) after reaching the maximum value exceeds the specific amount.

Method and device for detecting blocking or sluggishness of a DC motor

A circuit arrangement and a method for adjusting the power consumption of a load of a cooling fan motor of a motor vehicle that can be operated by a direct-voltage system has at least one semiconductor switch in the supply current circuit of the load, and a control unit for triggering the semiconductor switch or switches. The load is connectable via at least one sense field-effect transistor to the direct-voltage system the measurement output of the sense FET is connected to the control unit, and the control unit furnishes a signal corresponding to the current consumption of the load at the respective operating point.

Circuit arrangement and method for adjusting the power consumption of a load that can be operated by a direct-voltage system

Growing community of inventors

Buehl, Germany

Michael Koerner