UNINTERRUPTIBLE POWER SUPPLY APPARATUS
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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Abstract
A method of controlling an uninterruptible power supply apparatus (UPS) is provided. The UPS apparatus includes at least an AC input voltage, a DC input voltage and a single-phase AC/AC converter. The single-phase AC/AC converter includes an AC inductor, a bus capacitor, a boost arm, a common arm and a buck arm. The method includes steps of: controlling the bus voltage to have a DC component and full-wave rectifying component, and setting a bus voltage parameter K so that the bus voltage approaches to a full-wave rectifying voltage when K approaches to 1, wherein 0≦K≦1.
16 Citations
13 Claims
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1. An uninterruptible power supply apparatus, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An uninterruptible power supply apparatus, comprising:
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an AC input receiving an AC 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 the bus voltage is controlled to have a waveform including a low slope segment and a full-wave rectifying segment, a bus voltage parameter K representing an amount of an output power is set in a range of 0≦
K≦
1, 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 to regulate a proportion of the low slope segment and the full-wave rectifying segment within a full cycle based on a variation of the bus voltage parameter K, and the waveform of the bus voltage during the low slope segment has a slope lower than that of the waveform of the bus voltage during the full-wave rectifying segment. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification