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UNINTERRUPTIBLE POWER SUPPLY APPARATUS

  • US 20100308658A1
  • Filed: 07/29/2010
  • Published: 12/09/2010
  • Est. Priority Date: 07/12/2006
  • Status: Active Grant
First Claim
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1. An uninterruptible power supply apparatus, comprising:

  • an AC input receiving an AC input voltage; and

    a single-phase AC/AC converter including an AC inductor, a bus capacitor having a bus voltage, a boost arm having a first switch and a second switch, a common arm having a third switch and a fourth switch and a buck arm having a fifth switch and a sixth switch,wherein a bus voltage parameter K is set in a range of 0≦

    K≦

    1, so that the bus voltage approaches to the DC voltage when K approaches to 1, the bus voltage approaches to the full-wave rectifying voltage when K approaches to 0, and the first switch and the second switch of the boost arm, the third switch and the fourth switch of the common arm and the fifth switch and the sixth switch of the buck arm are controlled so that the bus voltage has a waveform including a DC segment and a full-wave rectifying segment according to the bus voltage parameter K to implement a regulation of the AC input voltage.

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