论文部分内容阅读
现在在中国市场上销售的UPS有很多品牌,基本可以分成下列几类:一.后备式UPS 后备式UPS主要是由电池、直流-交流变换器及转换开关组成,它可以提供一个较低成本的断电保护功能。在市电工作模式时,负载通常是直接与市电相接,所以负载大部份时间是使用市电供电。当市电电压降到一个预设的低压点时,转换开关切换到由电池经直流-交流变换器回路提供能量给负载。二.在线交互式UPS 传统后备式UPS的输出电压会随着输入电压变动而变动,所以
UPS is now sold in the Chinese market there are many brands, the basic can be divided into the following categories: I. Backup UPS backup UPS is mainly composed of batteries, DC - AC converter and transfer switch, it can provide a lower cost Power-off protection. In the mains work mode, the load is usually directly connected with the mains, so the load most of the time is the use of mains power supply. When the mains voltage drops to a preset low voltage point, the switch is switched to be supplied by the battery via the DC-AC converter loop to the load. Second, the online interactive UPS Traditional backup UPS output voltage changes with the input voltage changes, so