电源学报2024，Vol.22Issue(2)：113-120,8.DOI:10.13234/j.issn.2095-2805.2024.2.113
基于开关电容的单输入升压型七电平逆变器
Single-input Step-up Seven-level Inverter Based on Switched-capacitor
摘要
Abstract
Aimed at the problems of complex topologies,high total standing voltage of switches,and unbalanced series capacitor voltages in the existing multilevel inverters,a novel seven-level inverter based on switched-capacitor is proposed.By adopting the phase disposition pulse width modulation strategy,three capacitors are reasonably controlled in series/parallel with the DC source,so that the seven-level output with a triple boost gain is realized.The proposed inverter uses only one single DC source,so it has advantages such as a simple structure,fewer components,high boost gain and self-balanced capacitor voltage.In addition,it does not use the H-bridge to change the polarities of output levels,thus reducing the total standing voltage of switching devices.The topology,working principle,capacitor voltage self-balance,modulation strategy,capacitor parameter and current stress are analyzed,and five aspects including the numbers of switches,diodes and capacitors,the total standing voltage and the boost gain are compared with those of the existing topologies,which fully proves the practicality of the proposed topology.Finally,the feasibility of this topology was verified by experimental results.关键词
多电平逆变器/开关电容/电压自平衡/脉宽调制Key words
Multilevel inverter/switched-capacitor/voltage self-balance/pulse width modulation分类
信息技术与安全科学引用本文复制引用
张国鑫,陈仕铠,叶远茂..基于开关电容的单输入升压型七电平逆变器[J].电源学报,2024,22(2):113-120,8.基金项目
国家自然科学基金资助项目(51907033)This work is supported by National Natural Science Foundation of China under the grant 51907033 （51907033）
