An Universal Multilevel Space Vector Pulse-Width Modulation Algorithm for Single-Phase Cascaded H-Bridge Converter
Wu Xiajie1, Xiong Chenglin1, Feng Xiaoyun1, 2
1. School of Electrical Engineering Southwest Jiaotong University Chengdu 610031 China; 2. State Key Laboratory of Traction Power Southwest Jiaotong University Chengdu 610031 China
Abstract：An algorithm of universal multilevel space vector pulse-width modulation (SVPWM) is proposed for single-phase cascaded H-bridge converter, after analyzing the operation principle of single-phase cascaded H-bridge converter. The proposed algorithm has the advantages of low computational complexity, low total harmonic distortion (THD) and strong scalability. It simplifies single-phase multilevel SVPWM to single-phase two-level SVPWM. This paper realizes single-phase seven-level, nine-level and eleven-level SVPWM on a single field programmable gate array (FPGA). Experimental results based on the hardware in the loop system with DSP+FPGA have verified the proposed algorithm.
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2017, Vol. 32 
