Zf Friedrichshafen Ag

Johannes Hager

Michael Sperber

Stefan Hain

Marco Denk

Michael Meiler

Navid Daniali

A method for measuring a temperature of a coolant in a power module may include measuring a first temperature with a first temperature sensor and measuring a second temperature with a second temperature sensor. The method may include calculating a difference between the first temperature and second temperature, identifying one or more thermal resistances and one or more thermal capacitances with a thermal circuit corresponding to the power module and based on the calculated difference and at least one power loss in the power module. The method may further include determining the temperature of the coolant from the identified thermal resistances, thermal capacitances, the at least one power loss, and at least one of the two temperatures.

Device and method for measuring the temperature of a cooling medium for an inverter, inverter with such a device

Method for measuring an operating temperature of a power module () that is used for operating an electric vehicle drive, the power module () comprising a plurality of semiconductor switching elements () and drive electronics (), wherein the semiconductor switching elements () can be switched by the drive electronics () in such a way that the semiconductor switching elements () allow or interrupt a drain-source current in order to convert the direct current fed into the power module () at the input side into an output-side alternating current, wherein the method comprises measurement of a voltage present at a point located on a side of a diode () that is connected in series with the semiconductor switching element () and that faces away from the semiconductor switching element (), wherein the method comprises measurement of a drain-source current of the semiconductor switching element () that is generated by a current source (), wherein the method comprises determination of a mathematical dependency between the measured voltage and the measured current.

Power module for the operation of an electric vehicle drive with improved temperature determination of the power semiconductor

A power electronics assembly comprises a heat sink, at least two half bridge modules mounted on one side of the heat sink, a circuit board mounted on the half bridge modules, and at least one capacitor mounted on the circuit boards, wherein each of the half bridge modules has a housing that has a cold side that is mounted on the heat sink, and the housing has a connection side from which numerous connection pins project for each DC connection in the half bridge module that are connected to the circuit board, and wherein conductors in the circuit board are designed to connect the half bridge modules in parallel and connect them to the at least one capacitor to form a DC link.

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Marktleugast, Germany

Johannes Hager