Abstract
Three-level inverters are increasingly used in high-voltage and high-power applications. The fault diagnosis problem of the IGBTs gets highly attention considering to the safety and reliability of the system. Therefore, the IGBT open-circuit fault diagnosis of the three-level neutral point clamped (NPC) inverter is discussed in this paper. The output voltage of the inverter is analyzed when open-circuit fault occurs under open-loop condition. An improved algorithm is proposed based on the former results, which can be applied in the fault diagnosis of the open-circuit IGBTs in the closed-loop control system. The experimental results show that the proposed method can locate the fault IGBTs accurately and quickly with one open-circuit IGBTs.
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Acknowledgements
This research is supported by National Nature Science Foundation of China (51377013, 51407023), and the Fundamental Research Funds for the Central Universities (DUT15RC(4)04).
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Zhang, M., Guo, Y., Huang, K., Li, L., Zhang, X. (2016). IGBT Open-Circuit Fault Diagnosis for Closed-Loop System of Three-Level NPC Inverters. In: Jia, L., Liu, Z., Qin, Y., Ding, R., Diao, L. (eds) Proceedings of the 2015 International Conference on Electrical and Information Technologies for Rail Transportation. Lecture Notes in Electrical Engineering, vol 377. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-49367-0_69
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DOI: https://doi.org/10.1007/978-3-662-49367-0_69
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