摘要
为了改善传统多电平逆变器电路结构复杂的问题,利用较少的功率器件实现尽可能多的电平输出,提出一种新型单相五电平电压源逆变器。新型电路扑结是在传统的单相H桥型电压源逆变器的基础上,增加了两个单向功率开关,利用6个功率开关在交流侧就可以产生5个不同的电平输出。在分析电路拓扑工作原理和6种工作模式的基础上,给出了简单的PWM控制策略。实验结果验证了电路拓扑及其控制方法的有效性。
This paper presents a new single-phase five-level voltage-source inverter. The proposed design improved on the complex circuit structure of a conventional multilevel inverter and achieved as much output voltage levels as possible with fewer power switches. In this topology two power switches were used together with a conventional single-phase H-bridge voltage-source inverter. By using six power switches, five output voltage levels can be obtained at ac side. Simple PWM （Pulse-Width Modulation） control was achieved. The simple PWM control strategy was presented on the base of analysis of operating principles and six working model. Experimental results verify the validity of the proposed topology and control strategy.
出处
《电机与控制学报》
EI
CSCD
北大核心
2008年第3期300-303,共4页
Electric Machines and Control
关键词
电气设备
逆变器
五电平
拓扑结构
电压源逆变器
electric equipment
inverters
five-level
topology
voltage source inverters
