Abstract：AbStract Dual Buck inverter is a new topology which has the characteristics of no Shoot-through problem, high reliability and high efficiency. But the output of bridge is bi-polarity PWM waveform and voltage stress is high. To overcome those problems, three level combined SwitcheS are taken to replace diodes of dual buck inverter, then one three-level dual Buck inverter topology which has uni-polarity PWM waveforms output canbe obtained. Due to the use of modified control method combined high frequency PWM with low frequency modulation, the filter of new inverter is reduced and the merits of high efficiency and high reliable is remain at the same time. Experiment verifies those analysis.
[1] Liu Jun, Yan Yangguang．Reliable hysteresis current controlled dual buck half bridge inverter[J]. Transaction of Nanjing University of Aeronautics and Astronautics, 2003, 1(1): 67-72． [2] 洪峰, 刘军, 严仰光．滞环电流控制型双buck逆变器[J]．电工技术学报, 2004, 19(8): 73-77． Hong Feng, Liu Jun, Yan Yangguang. Hystersis current controlled dual buck half bridge inverter[J]. Transactions of China Electrotechnical Society, 2004, 19(8): 73-77. [3] 朱成花, 严仰光．一种新颖的串并联输出双Buck逆变器[J]．中国电机工程学报, 2005, 25(20): 12-15． Zhu Chenhua, Yan Yangguang. A novel series paraliel output dual Buck inverter[J]. Proceeding of the CSEE, 2005, 25(20): 12-15． [4] Yao Zhilei, Xiao Lan, Gong Chunying. Half-bridge- type inverter with hysteresis current control and unipolar modulation[C]. Proceedings of the 2010 5th IEEE Conference on Industrial Electronics and Applications, 2010: 1113-1117． [5] Lin B R, Hung T L．Single-phase half-bridge converter topology for power quality compensation[J]. IEE Proceedings on Electric Power Applications, 2002, 149(5): 351-359． [6] 洪峰, 单任仲, 王慧贞, 等. 一种新型的磁集成双Buck逆变器[J]. 电工技术学报, 2007, 22(6), 76-81. [7] Gao Liliang. Improvement in capacitor voltage balancing using multi-phase diode-clamped multi- level inverters[C]．3rd IET International conference on Power Electronics, Paris, France: 2006: 378-382． [8] Cetin S, Sazak B S, Bodur H. A comparative study of dual half-bridge inverter topologies used in induction cooking[C]. 2009 6th International Conference on Electrical Engineering/Electronics, Computer, Piscataway, NJ, USA: 2009. [9] Song B, McDoweel R, Bushnel A, et al. A three-level DC-DC converter with wide-input voltage operations for ship-electric-power distribution systems[J]. IEEE Trnsactions on Plasma Science, 2004, 32(5): 1856- 1863. [10] Ruan Xinbo, Li Bin, Chen Qianhong. Three-evel converters a new concept in high voltage DC- -DC conversion[C]. IEEE Power Electronics Specialists Conference, Cairns, Queensland, Australia: 2002.
2011, Vol. 26 
