新型三电平交流斩波电路的输出频谱结构分析  

RESEARCH ON THE OUTPUT FREQUENCY STRUCTURE OF NOVEL THREE-LEVEL AC CHOPPER

作　　者：石勇[1] 杨旭[1] 王兆安[1] 

机构地区：[1]西安交通大学电气工程学院,陕西西安710049

出　　处：《中国电机工程学报》2004年第6期106-110,共5页Proceedings of the CSEE

基　　金：国家自然科学基金(50007007)~~

摘　　要：关于多电平变换器的研究已经有十几年了,但是多电平技术在交流电能变换当中的应用尚不多见。三电平交流斩波电路是一种用于高压电能变换的新型电路拓扑。它允许使用低电压等级的器件完成高压电能变换,并采用较多的电平数去逼近所希望的波形,使输出电压或电流的质量大大提高,谐波含量减少。文中对三电平斩波电路的输出电压频谱进行了一股性的讨论,得到了普适的结论。这一结论同样可分析普通的交流斩波电路的输出频谱结构。通过实验验证了电路的工作原理。Multi-level technology was introduced ten years ago.However,this technology is rarely applied to direct AC/AC converters.A novel three-level AC chopper is proposed, which is a new multi-level direct AC/AC converter applied to high power conversion,and utilizes more votage levels to form output voltage and decrease the harmonic content of output waveform.The detail operation principles are discussed in th paper,and a comprehensive analysis about the output voltage frequency structure is given.The analysis results of output voltage frequency structure can also be used in normal ac chopper.Experimental results on a prototype are provided to valid the proposed circuit.

关 键 词：多电平变换器 三电平交流斩波电路 输出频谱结构 结构分析 电路拓扑 

分 类 号：TN624[电子电信—电路与系统]