An effect temperature measurement system for the high voltage pulse power switch application

How to thermostatic control and temperature monitor of the power electronics and its bank is very important to the healthy operation for the power converter. However, the work situation of the power electronics is high-level voltage, which will give bad influence to the temperature sensor head and its conditioning circuit. Some protection measures to the sensor head located in the high voltage level are necessary. An effective temperature test system used to detect the temperature of the heat bank of the pulse switch centered on thyristor is introduced. The integrated circuit temperature transducer AD590 has been proposed for the sensor head due to its simple use and its prompt availability. The sensor head is enclosed by an insulating box, which is casted by the silicone gel. And it is installed in the high voltage terminal of the current-carrying plate. The output signal reflected the temperature of the bank plate is transmitted by the twisted pair line with shielded cable. The test system can endure the high level voltage and be useful to the acquirement the operation state of the pulse power switch.