摘要
介绍Boost三电平直流变换器的工作原理及其升压比和占空比的关系,从理论上分析该变换器的两输出电容分压不均的原因,推导出实现均压的条件,并据此设计了一种通过调节占空比来实现均压的数字控制方法,最后利用Mat-lab中的Power System Blockset工具箱,并结合该控制算法对该变换器进行开环和闭环电路仿真。仿真结果表明,所设计的方法能够实现电容的分压均衡,并能确保输出电压稳定。
The principle of a Boost three-level converter is introduced at first,the relation formula of the boosting proportion and duty cycle are included.The reason of unbalancing capacitor voltage and the condition of realizing balancing voltage in theory are emphasizes studied in the paper.A digital control method by regulating the duty cycle to realize steady output and balancing voltage is schemed out,based on which the open and closed loop circuit simulation with power system blockset of Matlab is built.The re...
出处
《通信电源技术》
2008年第1期9-12,共4页
Telecom Power Technology
关键词
三电平变换器
脉宽调制
闭环控制
均压
仿真
three-level converter
PWM
closed-loop control
balancing voltage
simulation
