| Title |
An Accurate Junction Temperature Estimation Algorithm for MOSFETs using Kalman Filter |
| Authors |
Yong-Kyeong Lee ; Eun-Taek Nam ; Im-Bo Kong ; Su-Yong Chae |
| DOI |
https://doi.org/10.6113/TKPE.2024.29.2.99 |
| Keywords |
Junction temperature; Health monitoring; MOSFET; Kalman filter; Thermal model; Rainflow algorithm |
| Abstract |
In this paper, an algorithm that utilizes a low-speed temperature sensor and Kalman filter was introduced to estimate the junction temperature of a power MOSFET in real time. The Kalman filter was designed to estimate the junction and internal layers’ temperatures on the basis of the Cauer thermal model. The calculated power loss and measured ambient temperature of a MOSFET were used as input for the Kalman filter to estimate the junction temperature. The proposed algorithm can effectively estimate variations in junction temperature even in the presence of uncertainties in the thermal model and measurement noise. The effectiveness of the proposed algorithm was evaluated in simulations and hardware experiments by using a synchronous buck DC-DC converter. |