A novel single-supply cascaded multilevel inverter

被引：0

作者：

Wang, Baocheng ^{[1
]}

Wang, Wei ^{[1
]}

Du, Huiyuan ^{[1
]}

Sun, Xiaofeng ^{[1
]}

机构：

[1] Key Lab of Power Electronics for Energy Conservation and Motor Drive of Hebei Province, College of Electrical Engineering, Yanshan University, Qinhuangdao 066004, China

来源：

Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2013年 / 33卷 / 30期

关键词：

Electric inverters - Modular construction - Pulse width modulation;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

From the view of economy and power integration, a novel single-supply cascaded multilevel inverter is proposed in this paper. Retaining the traditional cascaded multilevel inverter's merits of low voltage stress on each switch, few quantities of switches and easy modularization, it contains only one independent DC source in DC-link and DC source in other bridges are replaced by some capacitors. The independent DC source can charge the capacitors frequently by the introduction of the charging-switches pairs and keeps the voltage of the capacitors to be regarded as constant to some extent. The effective combination of the independent DC source and capacitors ensures that the cascaded multilevel inverter operates stably. The operation principle and carrier phase-shifted sinusoidal pulse width modulation (SPWM) strategy of the single-supply cascaded seven-level inverter are first presented in detail. The influencing factors of the capacitors voltage stability are deduced by mathematical analysis, and the result serves as theoretical basis of the parameter optimization. In addition, the charging-loss is calculated. Control system is digitally implemented with TMS320F2407A DSP and XC3S400 FPGA. A 1 (kW inverter prototype has been built to verify the feasibility of the proposed topology. © 2013 Chin. Soc. for Elec. Eng.

引用

页码：10 / 17