一种新型的低成本高性能在线式UPS

A new single-phase on-line UPS with low cost and high performance

提出了一种新型的低成本单相在线不间断电源(UPS)。该系统包括具有功率因数校正(PFC)功能的整流/升压转换器和连接到DC-Link总线的两桥臂逆变器,电池组通过一个非常简单的系统可直接连接到DC-Link总线。采用6开关管的架构,相对于传统的8开关管全桥拓扑结构的系统降低了成本。即使在非线性负载下,该系统仍具有功率密度高和高品质输出电压的特点。最后详细描述了电路操作、分析以及模拟和实验结果。

This paper presents the design considerations and performance analysis of a new single-phase on-line uninterrupt- ible power supply （UPS） system with low cost owing to the reducing number of switches. The proposed new UPS system consist of an integrated rectifier/boost converter with power factor correction （PFC） capabilities and a two-leg inverter connected to the DC- Link bus. The battery sets are directly connected to the DC-Link bus resulting in a very simple system. The proposed topology uses only 6 active switches reducing the cost of the system compared to the traditional 8 switch topologies. It has sinusoidal input current with unity power factor and high quality output voltage even with nonlinear loads. Detailed circuit operation and analysis as well as simulation and experimental results are presented.