Battery in medium and large UPS secures the energy for uninterrupted power supplying.
大型UPS系统中蓄电池为交流不间断供电提供了能源保证。
Three-phase inverter of large power on-line UPS, which is widely used in industry, civil and military and so on, is over-all studied in this dissertation.
本文致力于三相大功率在线式UPS 逆变系统的研究，这种UPS 将被广泛应用于工业、民用和军用等。
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