Online uninterrupted power supply
A power supply, wire-type technology, applied in circuit devices, battery circuit devices, output power conversion devices, etc., can solve the problems of too much power loss and low efficiency in conversion, and achieve the effect of reducing conversion power loss.
Active Publication Date: 2012-11-14
MERRY ELECTRONICS (SHENZHEN) CO LTD
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Problems solved by technology
But the known ( Figure 4 As shown) the uninterruptible power supply (UPS) full load operating efficiency is about 80% to 85%, and the efficiency is lower at light load, and the conversion loss is too much power
Method used
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[0023] figure 1 It is a structural block diagram of an on-line uninterruptible power supply device according to a preferred embodiment of the present invention. The on-line uninterruptible power supply device of this preferred specific embodiment comprises:
[0024] A filter device 1, coupled to the AC input terminal, used to filter the input commercial power;
[0025] A rectifying device 2, the input end of which is coupled to the output end of the filtering device 1, for rectifying and outputting the filtered mains power;
[0026] A battery device 3, coupled in parallel to the output end of the rectifier device 2, is used to provide a DC voltage when the mains power fails;
[0027] A silicon-controlled switch 4, electrically connected to the battery device 3, the battery device 3 supplies power when the silicon-controlled switch 4 is turned on;
[0028] A DC / DC conversion device 5, the input end of which is coupled to the output end of the rectification device 2;
[002...
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The invention relates to an online uninterrupted power supply comprising an alternating current input coupled with a mains input end, an alternating current output coupled with a load end, a rectifierThe invention relates to an online uninterrupted power supply comprising an alternating current input coupled with a mains input end, an alternating current output coupled with a load end, a rectifierdevice used for the rectified output of the inputted alternating voltage, a direct current / direct current conversion device, a direct current device used for providing direct current voltage when mai device used for the rectified output of the inputted alternating voltage, a direct current / direct current conversion device, a direct current device used for providing direct current voltage when mains power is off and a first switch device which is powered by a direct current power supply when being conducted, a direct current / alternating current conversion device and a second switch device usedns power is off and a first switch device which is powered by a direct current power supply when being conducted, a direct current / alternating current conversion device and a second switch device usedfor switching the power supply between the mains power and the uninterrupted power supply; wherein the direct current / direct current conversion device is used for converting input direct current volt for switching the power supply between the mains power and the uninterrupted power supply; wherein the direct current / direct current conversion device is used for converting input direct current voltage into sine-wave pulse width direct current voltage which is processed into sine-wave pulse width alternating current voltage by the direct current / alternating current conversion device and then outage into sine-wave pulse width direct current voltage which is processed into sine-wave pulse width alternating current voltage by the direct current / alternating current conversion device and then output after being filtered, thus reducing the power conversion loss; and the direct current / direct current conversion device also can be used for conveying excess energy generated by a load side or theput after being filtered, thus reducing the power conversion loss; and the direct current / direct current conversion device also can be used for conveying excess energy generated by a load side or thedirect current / alternating current conversion device back to the direct current power supply for storing energy, thus realizing power-saving effect.direct current / alternating current conversion device back to the direct current power supply for storing energy, thus realizing power-saving effect.
Description
technical field [0001] The invention relates to an uninterruptible power supply device, especially an improved on-line uninterruptible power supply device. Background technique [0002] An uninterruptible power supply (UPS) is an AC power supply that can provide AC power instantaneously when the mains power is abnormal. At present, the known on-line uninterruptible power supply device adopts AC-DC and DC-AC double conversion devices, such as Figure 4 shown. Mains input is firstly filtered by the filter device 111, then overloaded by the fuse 112, rectified by the three-phase full-bridge rectifier 113, filtered by the capacitor filter 115 into DC voltage, and the battery device 114 is also passed by the three-phase full-bridge rectifier 113 provides a DC voltage, which is sent to the inverter device 117 through a fuse 116. The DC voltage is isolated and boosted by a power frequency transformer to generate a sine wave voltage using SPWM (SINEWAVEPULSE WIDTH MODULATION) contr...
Claims
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IPC IPC(8): H02J7/00H02J7/04H02M3/335H02M7/5387
Inventor 王庆文
Owner MERRY ELECTRONICS (SHENZHEN) CO LTD