Accurate current measurement method in high frequency hybrid switch test and application

LETTER

Peixuan Jiang, Bo Gao, Yuheng Gao, Jialu Wang, Xiao Wang, Ping Wang, College of Optoelectronic Engineering, Key Laboratory of Optoelectronic Technology and Systems Education Ministry of China, Chongqing University">Xianping Chen

Author information

Peixuan Jiang
School of Electrical Engineering, State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University
Bo Gao
College of Optoelectronic Engineering, Key Laboratory of Optoelectronic Technology and Systems Education Ministry of China, Chongqing University
Yuheng Gao
College of Optoelectronic Engineering, Key Laboratory of Optoelectronic Technology and Systems Education Ministry of China, Chongqing University
Jialu Wang
College of Optoelectronic Engineering, Key Laboratory of Optoelectronic Technology and Systems Education Ministry of China, Chongqing University
Xiao Wang
College of Optoelectronic Engineering, Key Laboratory of Optoelectronic Technology and Systems Education Ministry of China, Chongqing University
Ping Wang
School of Electrical Engineering, State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University
Xianping Chen
School of Electrical Engineering, State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University
College of Optoelectronic Engineering, Key Laboratory of Optoelectronic Technology and Systems Education Ministry of China, Chongqing University

Keywords: hybrid switch, current measurement, inductance impact, turn-off characteristics

JOURNAL FREE ACCESS

2024 Volume 21 Issue 11 Pages 20240058

DOI https://doi.org/10.1587/elex.21.20240058

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Abstract

Hybrid switch (HyS) consisting of Si IGBT and SiC MOSFET becomes increasingly popular due to its prominent advantages of low power loss and cost in clear energy era. However, the existing studies suffer from the current measurement methods due to the insertion inductance and inductive signal overshoot, which may lead to inaccurate measurements of loss, electrical stress and also limited performance of HyS at high switching frequencies. This paper conducts an in-depth study on the impact of inner loop inductance on HyS turn-off process. And an accurate current measurement method is proposed for high frequency HyS test and application, showing significant improvement in insertion inductance level and high-bandwidth accuracy.

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