Wide-input step-down inverter system based on switched capacitor network and control method

The invention relates to a wide-input step-down inverter system based on a switched capacitor network. The wide-input step-down inverter system comprises an input direct-current source, the switched capacitor network, a single-phase high-frequency combined modulation switch, an output filter circuit and a load; and the input direct current source, the switched capacitor network, the single-phase high-frequency combined modulation switch, the output filter circuit and the load are cascaded in sequence. Compared with a traditional step-down inverter system, the inverter has the advantages of being high in efficiency, small in size, wide in input voltage range and the like, and is suitable for large-capacity inverter occasions. 本发明涉及一种基于开关电容网络的宽输入降压逆变系统，包括输入直流源、开关电容网络、单相高频组合调制开关、输出滤波电路和负载；所述输入直流源、开关电容网络、单相高频组合调制开关、输出滤波电路和负载依序级联。本发明相较于传统降压逆变系统，具有效率高、体积小、输入电压范围宽等优点，适用于大容量逆变场合。