Method for checking the plausibility of the torque of an electric machine and machine controller for controlling an electric machine and for carrying out the method

US9065376B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Roland Schleser · Riegelsberg, DE
• Daniel Raichle · Lambach, DE
• Torsten Heidrich · Lambach, DE
• Dragan Mikulec · Erlangen, DE
• Gunther Goetting · Stuttgart, DE
• Stephan Hanel · Markgröningen, DE

Key dates

• Filing date: Sep 16, 2010
• Grant date: Jun 23, 2015
• Expiry date: May 6, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/64
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A method for checking the plausibility of a torque of an electric machine, calculated on the basis of a machine model, in which a first value of an electromagnetic power of the electric machine is determined from the calculated torque and a rotational speed of the electric machine. Stator current components and stator phase voltage components are calculated from the stator currents and the stator phase voltages with respect to a reference system, which is fixed in relation to the stator. A second value of the electromagnetic power of the electric machine is determined from the stator current components and the stator phase voltage components. If a deviation of the first value of the electromagnetic power of the electric machine from the second value exceeds a predefined power threshold value, the torque of the electric machine, calculated on the basis of the machine model, is classified as implausible.