Cyberpower Systems, Inc.

Zi-Wei Lin

Chao-Ching Yang

Lien-Hsun Ho

Chun-Chao Liao

Hsun-Ping Cho

Hong-Jhih Chen

An on-line uninterruptible power system and an operation method thereof are provided. The on-line uninterruptible power system comprises a first switch unit, a second switch unit, a charging circuit, a DC-AC conversion circuit, a power factor correction circuit and a control circuit. When the on-line uninterruptible power system is in a line mode, the control circuit controls the operation of the power factor correction circuit to limit the magnitude of its input current to not exceed a first predetermined value.

On-line uninterruptible power system and operation method thereof

An uninterruptible power system comprising an input unit, a battery, a first voltage conversion unit, a second voltage conversion unit, an output unit and a control circuit is provided. The control circuit is configured to control the operations of the input unit, the first voltage conversion unit, the second voltage conversion unit and the output unit, and to determine whether to derate the rated output power of the uninterruptible power system according to a first setting command, wherein the first setting command is used to indicate whether the uninterruptible power system is electrically connected to AC power source through a power cord. In addition, an operation method corresponding to the uninterruptible power system is also provided.

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Taipei, Taiwan

Zi-Wei Lin