An electronic temperature sensor for measuring the depletion-layer temperature of an electronic power circuit breaker in the operation and method of the depletion-layer temperature by means of this electronic sensor

摘要

An electronic temperature sensor for measuring the depletion-layer temperature of an electronic power switch (4) of a static converter (8) comprises a feed source of a calibrated measuring current (20) and a measuring amplifier a differential voltage (76; 276).The electronic sensor comprises a first serial connection element (26) and a second serial connection element (28), which are each provided with the input terminals (78, 80) of the difference voltage amplifier (76; 276) are connected.The first and second serial connection element (26, 28; 224, 226), which are configured to the amplifier to protect in front of a high voltage, have electrical properties, which are substantially identical and belong to the group consisting of the resistors and the fast diodes for high voltage (ht) are formed.