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Thermal Runaway Protection for IGBT Module, Temperature Monitoring of NTC Thermistor
2026/04/10 03:04:21


IGBT module continuously generates heat during operation, and if the temperature becomes too high, it will lead to performance degradation, shortened lifespan, or even damage. By integrating EXSENSE MELF glass-encapsulated NTC thermistor into the IGBT module, it will monitor the temperature changes of module in real-time and convert the temperature signals into electrical signals for output. After these electrical signals are collected and processed by the control system, the temperature of the IGBT module can be effectively controlled by adjusting its working state or activating the heat dissipation device based on the preset temperature threshold.

 

In EV motor controller, EXSENSE glass-encapsulated NTC thermistor ensures stable operation of the IGBT module by monitoring and controlling its temperature; In industrial frequency converter, NTC can prevent IGBT module from being damaged by overheating, thereby improving production efficiency; In photovoltaic inverter, NTC thermistor enables temperature management of the IGBT module to ensure the efficient operation of the power generation system. Therefore, using EXSENSE glass-encapsulated NTC thermistor in IGBT module helps maintain smooth operation and strongly supports device performance. This relies on the excellent characteristics of NTC thermistor, which match the thermal management requirement of IGBT module:

 

1. Excellent sensitivity: Can quickly respond to subtle temperature fluctuations, timely converting the temperature signals into electrical signals for output, preventing performance degradation of the IGBT module due to abnormal temperatures.

 

2. High-temperature resistance: Under rated operating conditions, the junction temperature of IGBT module can reach 150℃ or higher, the glass casing of EXSENSE glass-encapsulated NTC can still stably operate in such high-temperature environment, continuously and accurately monitoring the temperature of IGBT module and providing reliable temperature data to the control system.

 

3. Small dimension: The compact structure of the glass-encapsulated thermistor allows it to be integrated into the limited space of the IGBT module, achieving stable thermal coupling.

 

The protection strategy based on temperature feedback from EXSENSE glass-encapsulated NTC thermistor is key to over-temperature protection and lifespan management of IGBT module. With the assistance of NTC, IGBT module can reduce thermal cycling damage by dynamically adjusting heat dissipation power or load output in real time, effectively extending the mean time between failures of module. With the development of power electronic devices towards higher power density and miniaturization, EXSENSE Electronics believes that with the help of EXSENSE MELF glass-encapsulated NTC thermistor for temperature monitoring and control, the stable operation and performance optimization of IGBT module can be continuously ensured.

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