ELECTRONIC TEMPERATURE SENSOR FOR MEASURING THE JUNCTION TEMPERATURE OF AN ELECTRONIC POWER SWITCH DURING OPERATION, AND METHOD FOR MEASURING THE TEMPERATURE OF THE JUNCTION BY THIS ELECTRONIC SENSOR

摘要

An electronic temperature sensor for measuring the junction temperature of an electronic power switch (4) of a static converter (8) comprises an injection source of a calibrated measurement current (20) and a differential voltage measurement amplifier (76; 276). The electronic sensor comprises a first series connection element (26) and a second series connection element (28) connected respectively to the inlet terminals (78, 80) of the differential voltage amplifier (76; 276). The first and second series connection elements (26, 28; 224, 226) are configured to protect the amplifier against a high voltage, have essentially identical electrical characteristics, and are included in the assembly formed by the high-voltage resistors and fast diodes (HT).