Dr. Ing. H.c. F. Porsche Aktiengesellschaft

Thomas Hubert

Robert Nelles

Stefan Schmitz

Joerg Schneider

Axel Heitmann

Jan Nägelkrämer

Johannes Wende

Michael Reinlein

Christian Holler

Sven Luthardt

Stefan Schmidt

A method is provided for operating an electric drive system () with an electric machine () that comprises a first multiphase winding operatively coupled to a first inverter (), and has at least one second multiphase winding that is coupled to a second inverter (), A first energy storage () is arranged upstream of the first inverter (), and a second energy storage () is arranged upstream of the second inverter (). The method includes: operating the electric machine () by providing a first power flow between the first energy storage () and the first multiphase winding; and energizing the second inverter () so that a second power flow can be provided between the first energy storage () and the second multiphase winding. An electric drive system also is provided for carrying out the method.

Method for operating an electric drive system having a plurality of energy storage means

A method for controlling an electric machine, in particular a permanent magnet synchronous machine, having a first, in particular three-phase, winding system, which is controlled by a first converter, and having a second, in particular three-phase, winding system, which is controlled by a second converter. The first converter is operated with block commutation and the second converter is operated with pulse width modulation, in particular space vector modulation.

Method for controlling an electric machine and drive system for a vehicle

A stator for an electric machine provided for purely electrically driving a motor vehicle is provided with a stator body forming stator grooves, a stator winding through which current can flow, which engages in the respective stator groove and axially protrudes from the stator groove, for forming an electromagnetic rotating field and an insulation paper, which is provided in the stator groove between the stator winding and the stator body, for electrically insulating the stator winding from the stator body, wherein the insulation paper protrudes from the stator groove, wherein the insulation paper is provided with an additional layer on the surface thereof for providing a higher creepage resistance compared to the surface of the insulation paper without the additional layer.

Stator for an electric machine having insulation paper for a stator winding

A stator of an electric machine includes: a laminated stator core having sheet-metal blanks which have apertures, the apertures being closed radially on an inside thereof by a web when viewed in a cross section extending in a radial direction of the stator; and stator windings, which are accommodated in the apertures of the laminated stator core. The web which closes a respective aperture radially on the inside is plastically deformed so as to introduce a mechanical stress into the web.

Stator of an electric machine, method for producing same and electric machine

A method for operating a synchronous machine having a rotor, comprising the following features: the synchronous machine is modelled, with respect to the rotor, as a two-phase system with a direct-axis current and a quadrature-axis current, rotor losses of the synchronous machine, which rotor losses occur in the rotor, are numerically described by an evaluation function of the first direct-axis current, of the quadrature-axis current and of a specified rotation speed of the synchronous machine, and, on the basis of the evaluation function, the direct-axis current and the second quadrature-axis current are controlled for the specified rotation speed and a required torque in such a way that the synchronous machine outputs the required torque and the rotor losses are low and a corresponding synchronous machine, a corresponding computer program and a corresponding storage medium.

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Leonberg, Germany

Thomas Hubert