MONITORING THE TEMPERATURE SENSORS OF A PULSE-CONTROLLED INVERTER

摘要

The present invention relates to a method for monitoring a number of temperature sensors of power switches of a pulse-controlled inverter, the method comprising the following steps: detecting a number of temperature values that were measured by the number of temperature sensors; determining temperature differences of two respectively detected temperature values; calculating a temperature difference error for each of the determined temperature differences that lie outside the predetermined range; and determining a plausibility error for each temperature sensor, the temperature differences of which have temperature difference errors, based on the temperature difference errors of the temperature sensor. The plausibility errors may be utilized in order to protect the power electronics, wherein the power of an electric machine connected to the pulse-controlled inverter and operated by the pulse-controlled inverter for said protection is reduced by a factor determined by the plausibility error. The method may be carried out any time and/or during or after the occurrence of certain events compromising the power electronics.