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

Claim 9:
10. A power module for operating an electric vehicle drive, comprising:
at least one semiconductor switching element and drive electronics, wherein the drive electronics is configured to switch the at least one semiconductor switching element in such a way that the at least one semiconductor switching element allows or interrupts a load current, in order to convert an input-side direct current fed to the power module into an output-side alternating current;
a diode that is connected in series with the at least one semiconductor switching element;
a controller configured to:
measure a value of a voltage present at a point located on an upstream side of the diode that is connected in series with the at least one semiconductor switching element;
measure a drain-source current of the at least one semiconductor switching element that is generated by a current source; and
determine a mathematical dependency between the measured value of the voltage and the measured current.