Abstract
In view of the secondary rectifier diode overvoltage damage problems in the DC–DC link during the operation process of the metro auxiliary converter, this paper analyzes the mechanism of overvoltage and a novel way of RCD snubber is proposed. Different from the traditional snubber circuits, it has the characteristics of less resistor heat, high energy utilization rate, good voltage spike suppression effect, etc. On the basis of metro auxiliary converter circuit topology, this paper has carried out detailed research on the energy flow during the snubber circuit voltage clamped process and put forward the snubber parameter calculation method. Then experimental verification is made by a simulation model based on SABER and 77 kVA prototype platform, which proves the rationality of the RCD snubber circuit design.
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Acknowledgments
This work is supported in part by the National Natural Science Foundation of China under Grant U1134204, the China National Science and Technology Support Program under Grant 2013BAG24B01 and “the Fundamental Research Funds for the Central Universities” under Grant 2012JBM099.
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Fu, Y., Diao, L., Du, H., Jia, H., Wang, L. (2014). Design and Research for the Low-Loss Passive Snubber Circuit Used in the Metro High Frequency Auxiliary Converter. In: Jia, L., Liu, Z., Qin, Y., Zhao, M., Diao, L. (eds) Proceedings of the 2013 International Conference on Electrical and Information Technologies for Rail Transportation (EITRT2013)-Volume II. Lecture Notes in Electrical Engineering, vol 288. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-53751-6_9
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DOI: https://doi.org/10.1007/978-3-642-53751-6_9
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