Patent ID: 11923785
Assignee: ZF FRIEDRICHSHAFEN AG
Field: Measurement (Instruments)
Classification: CPC G  H  B | IPC B  G  H

Claim 0:
1. A method for measuring an operating temperature of a power module that is used for operating an electric vehicle drive, the power module comprising at least one semiconductor switching element and drive electronics, wherein the at least one semiconductor switching element is configured to be switched by the drive electronics in such a way that the at least one semiconductor switching element allows or interrupts a load current in order to convert direct current fed into the power module at an input side into an output-side alternating current,
wherein the method comprises:
measuring a value of a voltage present at a point located on an upstream side of a diode that is connected in series with the at least one semiconductor switching element;
measuring a drain-source current of the at least one semiconductor switching element that is generated by a current source, and
determining a mathematical dependency between the measured value of the voltage and the measured current.