Method for detecting and / or monitoring the temperatures of at least two electronic power switches, in particular semi-conductor power switches that are coupled with or arranged on a common cooling body, whereby a temperature detection and / or monitoring is carried out by means of a temperature model each allocated to a switch, in which switch and operating parameters as well as
temperature measurement values are processed for calculating the temperature and / or a
temperature difference in the relevant switch, whereby a
temperature measurement value from a temperature sensor is used as an input parameter for the temperature model, the same being centrally positioned between at least two switches and standing in a
heat conducting connection with the cooling body.
Electronic temperature emitting power switch arrangement, in particular a
transformer for electric drives or other power rectifiers for carrying out the method according to one of the preceding Claims, with two or more switches, in particular semi-conductor power switches coupled with or arranged on a common cooling body, and with a
calculator suitable for implementing and executing a temperature model by means of one switch each, and interfaces for receiving signals representing switch and operating parameters as well as
temperature measurement values in order to calculate the temperature and / or a
temperature difference within the relevant switch by means of the temperature model, whereby a temperature sensor is positioned centrally between the two or between two switches each, the same being coupled in a
heat conducting way with the cooling body and with the output side of the
calculator.