电压探头对宽禁带器件高频暂态电压精确测量的影响

doi:10.19595/j.cnki.1000-6753.tces.191736

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摘要

随着宽禁带半导体器件的发展,电力电子器件的开关速度越来越快,工作电压逐渐升高,致使电压探头的性能对电力电子器件暂态电压测量结果的影响程度增大。该文分析几种实验室常用的示波器电压探头的测量原理,根据电压探头的电路分析模型,研究探头的带宽/上升时间、寄生电感和共模抑制比等几个关键因素对高频暂态电压测量结果的影响。最后搭建实验平台,实验结果验证了理论分析的有效性。

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	何杰
	刘钰山
	毕大强
	李晓

关键词 ：电压探头, 精确测量, 暂态电压, 宽禁带器件

Abstract：

With the development of wide-bandgap semiconductor devices, the switching speed of power electronic devices is getting faster, and the operating voltage is increasing, which makes the performance of voltage probes have increasing impacts on the measured transient voltages of power electronic devices. This paper analyzed the measuring principles of several commonly used oscilloscope voltage probes in the laboratory. Their circuit models were built. The impacts from the key factors of the probe, such as the bandwidth/rise time, parasitic inductance and common mode rejection ratio, on measured high-frequency transient voltages were studied. Finally, an experimental platform was built, and the results verified the proposed theoretical analysis.

Key words： Voltage probe accurate measurement transient voltage wide-bandgap devices

收稿日期: 2019-12-12

PACS:

TM930.1

基金资助:

中央高校基本科研业务费专项资金（KG16034501）、电力系统及大型发电设备安全控制和仿真实验室开放课题（SKLD20M05）及清华大学本科教学改革项目（DX02-09）资助

通讯作者: 毕大强男,1973年生,高级工程师,研究方向为电力系统主设备继电保护、电力电子技术在电力系统中的应用。E-mail: bidaqiang@mail.tsinghua.edu.cn

作者简介: 何杰男,1995年生,硕士研究生,研究方向为SiC器件驱动设计。E-mail: hejie_love@buaa.edu.cn

引用本文:

何杰, 刘钰山, 毕大强, 李晓. 电压探头对宽禁带器件高频暂态电压精确测量的影响[J]. 电工技术学报, 2021, 36(2): 362-372. He Jie, Liu Yushan, Bi Daqiang, Li Xiao. Impacts of Voltage Probes for Accurate Measurement of High-Frequency Transient Voltage of Wide-Bandgap Devices. Transactions of China Electrotechnical Society, 2021, 36(2): 362-372.

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https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.191736 https://dgjsxb.ces-transaction.com/CN/Y2021/V36/I2/362

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