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Analysis and Solution of Voltage Overshoot of Keep-Off State Devices in Three Level Simplified Neutral Point Clamped Inverter
ID：115 View Protection：ATTENDEE Updated Time：2022-10-11 11:32:25 Hits：1139 Oral Presentation

Start Time：2022-11-04 10:40（Asia/Shanghai）

Duration：20min

Session：E Power Electronics Technology and Application » OS6Oral Session 6

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Abstract
This paper demonstrates a unique voltage overshoot phenomenon of keep-off state devices in three level simplified neutral point clamped (3L-SNPC) inverter which comprises a DC-DC chopper and a three-phase two-level (2L) inverter. The issue is found to be related to the switching action of the DC-DC chopper and will introduce voltage overshoot on the constant keep-off state devices in the 2L-inverter. The switching transients of different switching cases are analyzed to reveal the mechanism of the voltage overshoot phenomenon. Based on the analysis, a snubber circuit is used to suppress the voltage overshoot. Simulations using LTspice software validate the analysis and the solution.
 
Keywords
3L-SNPC, voltage overshoot, keep-off state devices, switching transients, snubber circuit
Speaker
Xinyue Guo
Huazhong University of Science and Technology；State Key Laboratory of Advanced Electromagnetic Engineering and Technology

Submission Author
Xinyue Guo Huazhong University of Science and Technology；State Key Laboratory of Advanced Electromagnetic Engineering and Technology
Menghu Liu Huazhong University of Science and Technology；State Key Laboratory of Advanced Electromagnetic Engineering and Technology
Jiajia Guan Huazhong University of Science and Technology；State Key Laboratory of Advanced Electromagnetic Engineering and Technology
Cai Chen Huazhong University of Science and Technology；State Key Laboratory of Advanced Electromagnetic Engineering and Technology
Yong Kang Huazhong University of Science and Technology;School of Electrical and Electronic Engineering
Rui Li Wuhan Second Ship Design and Research Institute
Jiuqing Cai Wuhan Second Ship Design and Research Institute
Xiang Jin Wuhan Second Ship Design and Research Institute
Peng Li Wuhan Second Ship Design and Research Institute
Jing Chen Wuhan Second Ship Design and Research Institute
Lei Yang Beijing Institute of Precision Mechatronics and Controls
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Important Date

  • Conference Date

    Nov 03

    2022

    to

    Nov 05

    2022

  • Aug 01 2022

    Draft paper submission deadline

  • Nov 04 2022

    Registration deadline

  • Nov 05 2022

    Contribution Submission Deadline

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