METHOD OF CONTROLLING AN UNINTERRUPTIBLE POWER SUPPLY APPARATUS
First Claim
1. A method of controlling an uninterruptible power supply apparatus having a bus voltage, an AC input voltage, a DC input voltage and a single-phase AC/AC converter, the single-phase AC/AC converter including an AC inductor, a bus capacitor, a boost arm, a common arm and a buck arm, the method comprising steps of:
- (a) controlling the bus voltage to have a DC voltage and a full-wave rectifying voltage; and
(b) setting a bus voltage parameter K where 0≦
K≦
1, so that the bus voltage approaches to the DC voltage when K approaches to 0 and the bus voltage approaches to the full-wave rectifying voltage when K approaches to 1;
wherein when the AC input voltage is normal, the bus voltage is rectified via the single-phase AC/AC converter to output, and when the AC input voltage is abnormal, the DC input voltage is inverted via the single-phase AC/AC converter to output.
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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.
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Citations
12 Claims
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1. A method of controlling an uninterruptible power supply apparatus having a bus voltage, an AC input voltage, a DC input voltage and a single-phase AC/AC converter, the single-phase AC/AC converter including an AC inductor, a bus capacitor, a boost arm, a common arm and a buck arm, the method comprising steps of:
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(a) controlling the bus voltage to have a DC voltage and a full-wave rectifying voltage; and
(b) setting a bus voltage parameter K where 0≦
K≦
1, so that the bus voltage approaches to the DC voltage when K approaches to 0 and the bus voltage approaches to the full-wave rectifying voltage when K approaches to 1;
wherein when the AC input voltage is normal, the bus voltage is rectified via the single-phase AC/AC converter to output, and when the AC input voltage is abnormal, the DC input voltage is inverted via the single-phase AC/AC converter to output. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of controlling an uninterruptible power supply apparatus having a bus voltage, an AC input voltage, a DC input voltage and a single-phase AC/AC converter comprising an AC inductor, a bus capacitor, a boost arm, a common arm and a buck arm, the method comprising steps of:
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(a) controlling the bus voltage and making the bus voltage have a waveform including a low slope segment and a full-wave rectifying segment;
(b) setting a bus voltage parameter K representing an amount of an output power, wherein 0≦
K≦
1; and
(c) regulating 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, the waveform of the bus voltage during the low slope segment having a slope lower than a further slope of the waveform of the bus voltage during the full-wave rectifying segment;
wherein, when the AC input voltage is normal, the bus voltage is rectified via the single-phase AC/AC converter to output, and when the AC input voltage is abnormal, the DC input voltage is inverted via the single-phase AC/AC converter to output. - View Dependent Claims (9, 10, 11)
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12. A method of controlling an uninterruptible power supply apparatus having a bus voltage, an AC input voltage, a DC voltage and an AC/AC converter, comprising steps of:
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(a) controlling the bus voltage to have a DC voltage and a full-wave rectifying voltage; and
(b) setting a bus voltage parameter K, where 0≦
K≦
1, so that the bus voltage approaches to the DC voltage when K approaches to 0 and the bus voltage approaches to the full-wave rectifying voltage when K approaches to 1.
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Specification