| 引用本文: | 张友军,丁明昌,任永保,王阿敏,翁振明.级联式Buck-Boost AC／AC变换器[J].电力自动化设备,2010,(9): |
| ZHANG Youjun,DING Mingchang,REN Yongbao,WANG Amin,WENG Zhenming.Cascaded Buck-Boost AC／AC converter[J].Electric Power Automation Equipment,2010,(9): |
|
| 摘要: |
| 详细分析了Buck型和Boost 型AC／AC变换器的工作原理及其控制方法，在此基础上提出了一种新型级联式Buck-Boost AC／AC变换器及其三模式控制策略。三模式控制策略是比较输入电压与基准输出电压的大小，使得变换器只有3种工作模式：Buck模式、Boost模式和滤波模式。该电路虽然由Buck型和Boost型AC／AC变换器2级变换器级联而成，并采用2级占空比调制，但实际上最多只存在一级功率变换，具有控制简单、变换效率高、开关管电压应力低等优点。仿真结果证明了级联式Buck-Boost AC／AC变换器及其控制策略的可行性和理论分析的正确性。 |
| 关键词: AC／AC变换器 级联式Buck-Boost 三模式控制策略 工作模式 |
| DOI： |
| 分类号: |
| 基金项目: |
|
| Cascaded Buck-Boost AC／AC converter |
|
ZHANG Youjun1,2, DING Mingchang2, REN Yongbao1, WANG Amin1, WENG Zhenming1
|
|
1.College of Mechanical & Electrical Engineering，Soochow University，Suzhou 215021，China;2.Nanjing University of Aeronautics and Astronautics，Nanjing 210016，China
|
| Abstract: |
| The operating principle and control method of Buck-type and Boost-type AC／AC converters are analyzed，and a cascaded Buck-Boost AC／AC converter and its three-mode control strategy are proposed. It compares the input voltage with reference output voltage，resulting in three operating modes：Buck，Boost and filter. Though the circuit comprises of the cascaded Buck-type and Boost-type AC／AC converters with two-stage duty cycle modulation，there is only one-stage power conversion. Its control is simple，efficiency is high and switching voltage is low. Simulative results verify the feasibility of cascaded Buck-Boost AC／AC converter and the correctness of theoretical analysis. |
| Key words: AC／AC converter cascaded Buck-Boost three-mode control strategy operating mode |
