The functions, working principle, classification of UPS and EPS, as well as the main characteristics of the common type of back-up, on-line, on-line interactive UPS are expatiated.
摘 要 分别介绍了UPS和EPS的功能、工作原理、分类，以及常见的后备式、在线式、在线交互式三种UPS的主要特点。
The paper mainly analysed the charge and invert principle of line-interactive UPS.
本文主要分析了在线互动式ups电源的充电、逆变的基本原理。
The paper mainly analysed the charge and invert principle of line-interactive UPS.
本文主要分析了在线互动式ups电源的充电、逆变的基本原理。
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