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A Method of Junction Temperature Estimation for SiC Power MOSFETs via Turn-on Saturation Current Measurement

A Method of Junction Temperature Estimation for SiC Power MOSFETs via Turn-on Saturation Current Measurement

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カテゴリ: 論文誌(論文単位)

グループ名: 【D】産業応用部門(英文)

発行日: 2019/03/01

タイトル(英語): A Method of Junction Temperature Estimation for SiC Power MOSFETs via Turn-on Saturation Current Measurement

著者名: Hui-Chen Yang (School of Electrical and Electronic Engineering, Nanyang Technological University), Rejeki Simanjorang (Applied Technology Group, Rolls-Royce Singapore Pte. Ltd.), Kye Yak See (School of Electrical and Electronic Engineering, Nanyang Techno

著者名(英語): Hui-Chen Yang (School of Electrical and Electronic Engineering, Nanyang Technological University), Rejeki Simanjorang (Applied Technology Group, Rolls-Royce Singapore Pte. Ltd.), Kye Yak See (School of Electrical and Electronic Engineering, Nanyang Technological University)

キーワード: junction temperature estimation,saturation current,SiC Power MOSFET,threshold voltage

要約(英語): Maintaining the operating junction temperature of a SiC Power MOSFET within a safe and tolerable range is crucial not only for safety reasons, but also for reliable operation, as thermal transient is one of the major stressors that threaten a device's life span. Conventional methods use thermal sensors for temperature monitoring. However, these sensors require extra space, and the measurement accuracy is affected by their position. Besides, they are unable to track the transient temperature variation owing to relatively slow response time. This paper proposes a new temperature sensor-less method to estimate the junction temperature of SiC power MOSFETs by measuring the device's turn-on saturation current (ID,sat). The device's square root of the saturation current (√ID,sat) and threshold voltage (Vth) can be extracted and adopted as junction temperature estimators. Compared to the threshold voltage, the square root of the saturation current has the advantage of a shorter test time. The feasibility of this temperature estimation method has been experimentally verified. The results suggest that the proposed method can be used as an alternative for effective online junction temperature monitoring.

本誌: IEEJ Journal of Industry Applications Vol.8 No.2 (2019) Special Issue Ⅰ on “Motion Control and its Related Technologies” Special Issue Ⅱ on “IPEC-Niigata 2018”

本誌掲載ページ: 306-313 p

原稿種別: 論文/英語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejjia/8/2/8_306/_article/-char/ja/

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