IGBT is Insulated Gate Bipolar Transistor, it’s a composite full-controlled voltage-driven power semiconductor device which is made up by Bipolar Junction Transistor and Metal Oxide Semiconductor.
Nowadays, many IGBT manufacturers would encapsulate an NTC thermistor inside the IGBT module, which is used to measure the shell temperature of the module. This is not only high precision, but also very accurate, not affected by the installed location and other factors. The NTC thermistors researched, developed and produced by EXSENSE Electronics Technology Co., Ltd. have the characteristics of high precision, high sensitivity, high reliability, which could conduct the internal testing of the IGBT module better. This time, let’s introduce a IGBT temperature measurement method based on optical fiber.
As shown in the above picture, this method are including the following steps:
5th, the control unit detects the frequency of the frequency signal first, then calculates the temperature of IGBT, the detection end.
This measurement method uses the optical fiber transmits signal, the ability of anti-electromagnetic interference is strong, which is suitable for the application in the electromagnetic interference in high requirement; The temperature of IGBT is detected by collecting the voltage of NTC thermistor, play a role of real-time monitoring, to avoid the IGBT overheating burned; The whole method is streamlined, the cost of hardware is lower, which can reduce application cost significantly.