中国电机工程学报Issue(30)：5313-5319,7.DOI:10.13334/j.0258-8013.pcsee.2014.30.007
中点钳位型H桥级联单相逆变器新型空间矢量脉宽调制方法
A Novel SVPWM Method for Single-phase Cascaded NPC H-bridge Inverter
摘要
Abstract
Through the analysis of single-phase cascaded neutral-point-clamped (NPC) H-bridge inverter’s switch states, 27 useful switch vectors are obtained. A space vector pulse width modulation (SVPWM) method for this nine-level inverter was proposed. Based on the proposed method, the one-dimensional space vector diagram can be divided into eight sectors. The output pulse type is determined by the magnitude of reference voltage vector, the section in which the vector lies and the terminative voltage vector in the last switching period. Based on the rule of minimum switching times, three vector synthesis methods were proposed. According to the volt-second balance principle, the effective time for every pulse type of voltage vector was calculated. Further, a rule for using redundant vectors was offered so as to make the capacitor voltage balance, the switching times reach the minimum and the power switch devices be used equitably. The proposed algorithm was realized using the DSP and FPGA chip. Simulation and experimental results show that the proposed modulation method is correct and feasible.关键词
单相逆变器/空间矢量脉宽调制/中点钳位/H桥级联/多电平Key words
single-phase inverter/space vector pulse width modulation (SVPWM)/neutral point clamped (NPC)/cascaded H-bridge/multilevel分类
信息技术与安全科学引用本文复制引用
李卫超,马伟明,汪光森,林城美,聂世雄,郭灯华..中点钳位型H桥级联单相逆变器新型空间矢量脉宽调制方法[J].中国电机工程学报,2014,(30):5313-5319,7.基金项目
国家863高技术基金项目(2011AA040302，2011AA040301)；国家自然科学基金项目(51207162)。The National High Technology Research and Development of China 863 Program (2011AA040302,2011AA040301) （2011AA040302，2011AA040301）
Project Supported by National Natural Science Foundation of China (51207162) （51207162）
