基于反激变换器的单级式DC/AC逆变器

单级式逆变器较传统的两级式逆变器,拓扑结构大大简化,减少了同时工作的开关器件的数目,降低开关损耗,在中小功率场合中的应用具有明显的优势.本文提出了一种新型的单级式隔离逆变电路-反激逆变器,文中对该电路的工作原理及控制策略进行了详细的分析,针对该电路过零点畸变问题提出了解决方法,并给出了电路主要参数的选取依据.最后通过仿真和实验验证了该新型电路的可行性.

Research on Single-Stage Inverter Based on the Flyback Converter

Compared with the traditional two-stage inverter, the single-stage isolated inverter is superior in the use of medium and small power field. Its structure is greatly simplified as well as the circuit components are reduced a lot. A novel single-stage flyback inverter is proposed in this paper. It is composed of two basic bi-directional flyback converters, which can operate independently. It only includes four power switches, and the inductor of output filter is eliminated. The circuit is very simple and in every operation mode only one switch is high frequency modulated. Its basic operation principles, the instantaneous voltage control scheme, and brief design procedure are described in the paper. Simulation and experimental results verified that it has the following advantages such as: compact topology, simple control scheme, good dynamic response and low current stress of the switches at the output ports.