Audi Ag

Franz Honkomp

Bernhard Karl

Martin Adam

Sebastian Heber

Uwe Feldmann

Bastian Heidler

Thomas Heckel

A method for checking a model temperature of an electrical machine ascertained by a temperature model. At least one manipulated variable relating to the electrical machine is specified by a regulation of the electrical machine as a function of a setpoint variable. A model value of the manipulated variable is ascertained as a function of the manipulated variable and the model temperature from a machine model comprising at least one temperature-dependent parameter. A difference between the actual manipulated variable of the regulation and the model value of the manipulated variable and/or a difference between a variable derived from the actual manipulated variable of the regulation and a corresponding further variable derived from the model value of the manipulated variable is ascertained. The difference is compared to a limiting value and, if the limiting value is exceeded, a deviation of the model temperature from an actual temperature of the electrical machine is detected.

Method for checking a model temperature of an electrical machine ascertained by means of a temperature model, and motor vehicle

A method and a device for checking the thermal state of an electric machine of a vehicle driven by at least two electric machines are described.

Motor diagnosis with braking torque compensation for electric vehicles

A method for determining an intermediate circuit voltage Uin an electrical system, which includes a battery, a DC-DC converter, a DC-AC converter, and an electrical machine. The battery is connected to the DC-DC converter, the DC-DC converter is connected to the DC-AC converter, and the DC-AC converter is connected to the electrical machine. An intermediate circuit of the electrical system is formed by the DC-DC converter and the DC-AC converter. A line-to-line voltage Û, which is applied to a conductor of the electrical machine, is determined, wherein a maximum degree of modulation mof the line-to-line voltage Ûis determined. The intermediate circuit voltage Uis determined according to the equation

Method for determining an intermediate circuit voltage

A system for a vehicle, which has a battery, a DC-DC converter, a DC-AC converter, an electric motor, and a switch. The battery is connected to the DC-DC converter and the DC-AC converter is connected to the electric motor. The switch is arranged between the DC-DC converter and the DC-AC converter, and the switch is designed, in a first switching state, to electrically connect the DC-DC converter and the DC-AC converter and to permit an exchange of electrical energy between the battery and the electric motor in order to carry out a traction process. The switch is designed, in a second switching state, to electrically isolate the DC-DC converter and the DC-AC converter, to connect the battery to an electrical charging station, and to permit an exchange of electrical energy between the battery and the electric charging station in order to carry out a charging process.

System for a vehicle

Methods and apparatuses for determining a rotor temperature of a permanent magnet synchronous machine (PSM) of an electrically driven vehicle are described.

Determination of the rotor temperature of a permanent magnet synchronous machine

A method for operating an electrical circuit, wherein the electrical circuit includes a DC converter, an inverter and an electric machine, wherein the inverter is connected on the direct current side to the output of the DC converter and on the alternating current side to the electric machine, wherein the electric machine is operated using a torque specification and/or a rotational speed specification, wherein the level of the output voltage of the DC converter is set as a function of a current torque specification and/or a current rotational speed specification.

Method for operating an electrical circuit, electrical circuit and motor vehicle

A method and a system for automatic yaw torque equalization (AYTE) in an electrically driven vehicle having wheel-individual torque distribution (torque vectoring drive).

Growing community of inventors

Ingolstadt, Germany

Franz Honkomp