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89 / 2022-07-01 09:56:05
Analysis and Solution of Voltage Overshoot of Keep-Off State Devices in Three Level Simplified Neutral Point Clamped Inverter
3L-SNPC, voltage overshoot, keep-off state devices, switching transients, snubber circuit
Power Electronics Technology and Application > Power Converter Topology
Final Paper
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
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.

 
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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