Robert Boschgmbh

Stefan Blind

Daniel Raichle

Gunther Goetting

Beqir Pushkolli

Andreas Heyl

Holger Niemann

Martin Eisenhardt

Klaus Rechberger

Manfred Stahl

Alexey Yushin

A method for determining an offset angle of an electric machine, including a stator, a rotor, and a shaft connected to the rotor is described. The shaft is provided in a (generally) no-load state, and the rotor is positioned with respect to the stator at a field angle. A sensor angle is determined by measuring with the aid of an angle sensor. The offset angle is provided as a function of the difference between the field angle and the sensor angle, and the configuration of the rotor includes impressing a standing or rotating stator magnetic field which corresponds to the field angle. An angle detection device for carrying out the method is also described.

Offset angle determination for synchronous machines

A method for operating an electrical network, in particular of a hybrid motor vehicle, the network having at least one electrical accumulator, in particular a high-voltage accumulator, at least one electric machine, and at least one inverter controlling the electric machine, the electrical accumulator being electrically disconnected from the network when a malfunction is detected and the inverter being switched to a short-circuit operating mode when a specifiable voltage limit of a network voltage of the network is subsequently exceeded. There is a provision for switching power semiconductors of the inverter in such a way that the driven electric machine induces a voltage and provides it via free-wheeling diodes on the electrical network and the induced voltage is used for operating the electric machine as a generator such that a specifiable network voltage is set by the electric machine.

Method for operating an electrical network, in particular of a motor vehicle

A method and a system for determining the rotor temperature of an electric motor of a hybrid vehicle. In a method for determining the rotor temperature of an electric motor of a hybrid vehicle in which it is possible to reliably determine the rotor temperature using simple means, the rotor temperature of the electric motor being ascertained by measuring an operating parameter of the electric motor during operation of the hybrid vehicle.

Method and system for determining the rotor temperature of an electric motor of a hybrid vehicle

A method for controlling an electrical machine of a hybrid drive includes: ascertaining at least one operating parameter value of the electrical machine; identifying an error, if the at least one operating parameter value does not correspond to the standard state of an operating parameter; and at least partially restricting the operation of the electrical machine as a propulsion unit if an identified error exists. The electrical machine is operated at least temporarily as a starter when an identified error exists, independently of the operation of the electrical machine as a propulsion unit.

Method and device for controlling an electrical machine of a hybrid drive with increased availability

A method for determining the torque of an electric machine, in particular a permanently energized electric machine. The torque is determined by a particularly simple and accurate method by measuring a phase voltage and the rotational speed of the electric machine and calculating the torque based on these values.

Growing community of inventors

Fellbach, Germany

Stefan Blind