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1 引言目前可供用户选择使用的UPS电源品种很多。按其工作方式分,可分为后备式和在线式两大类;按其输出电压波形来分,又可分为方波输出和正弦波输出两种。就UPS电源的电性能来讲,在线式正弦波输出UPS电源为最佳,其次是后备式正弦波输出UPS电源,最后是后备式方波输出UPS电源。但从价格来看,在线式正弦波输出UPS电源为最贵,后备式正弦波输出UPS电源次之,其中以后备式方波输出UPS电源最便宜。
1 Introduction Currently available for the user to choose a large variety of UPS power supply. Divided according to their working methods, can be divided into two types of back-up and online; according to the output voltage waveform to points, but also can be divided into square-wave output and sine wave output of two. In terms of the electrical properties of the UPS power supply, the on-line sine wave output UPS power supply is the best, followed by a backup sine wave output UPS power supply, and finally a backup square wave output UPS power supply. However, from the price point of view, online sine wave output UPS power is the most expensive, back-up sine wave output UPS power supply followed by backup square wave output UPS power supply the cheapest.