基于DSP的高频链并联逆变器的软开关技术

Soft-switch Technology Based on High-frequency Link Parallel Inverter

高频链并联逆变器是现代电力电子研究的一个热点。逆变器作为高频链并联系统的核心部分,实现逆变器的软开关特性,减小开关损耗是系统研究的一个重点。本文介绍了一种基于DSP的并联高频链逆变器的软开关技术。主电路采用FB-ZVZCS(全桥零电压零电流)软开关拓扑结构,结合电压外环电流内环双闭环控制系统,实现了逆变器的软开关。采用改进的PQ控制,有效地提高了负载的均流效果。仿真波形表明该逆变器具有良好的性能。

The inverter as the core of the High - frequency inverter linked parallel system to achieve the soft switching characteristics, reduce the switching losses is a priority of system research. The main circuit using FB -ZVZCS（ full -bridge zero -voltage and current）soft -switch topology, with the outer ring voltage current inner ring double -loop control system, achieves a soft switching inverter. Adopting improved control of the PQ, effectively improve the load flow results. Simulation shows that the inverter has a good performance.