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Novel Buck-Mode Three-Level AC Direct Converter

Jiamei Xu and Lei Li
College of Automation, NJUST, Nanjing, Jiangsu, 210094, China
Abstract—A novel buck-mode three-level AC/AC converter is proposed. Effectively to solve the problem such as switch voltage stress and harmonic interference of the two-level AC-AC converter existed in the field of large capacity transform, The inverter has the advantages such as simple topology, bidirectional power flow, two-stage power conversions, high frequency electrical isolation, three-level voltage across the output filter, strong load adaptability and so on. The converter could convert the alternating current with instability distortion to the steady sine alternating current with same frequency, this paper has studied the topology, high frequency switching process, and the feedback control strategy of instantaneous voltage value of this converter, also the diagram formed by the driving signal is given. At last, the correctness and advancement of this Buck-Mode Three-level converter are verified through simulation tests.

Index Terms—three-level, buck-mode, electrical isolation, AC/AC converter

Cite: Jiamei Xu and Lei Li, "Novel Buck-Mode Three-Level AC Direct Converter," Journal of Industrial and Intelligent Information, Vol. 3, No. 1, pp. 20-25, March 2015. doi: 10.12720/jiii.3.1.20-25
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