Off-line uninterrupted power supply device

A power supply device, off-line technology, applied in the direction of circuit devices, battery circuit devices, emergency protection circuit devices, etc., can solve the problems of easily damaged loads, sharp wave voltage affecting the quality of power supply, power loss, etc., and achieve the effect of reducing damage

Inactive Publication Date: 2009-09-02
ALOHA POWER INTEGRATION SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However Figure 4 and Figure 5 There are certain shortcoming in two kinds of known UPS structures: (1) two kinds of UPS structures AC voltage output is a kind of square wave form, for inductive load (as transformer, motor), this kind of square wave output will cause load easily damaged; (2) Figure 4 The UPS structure shown can only be used in places where the mains voltage fluctuation r...

Method used

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  • Off-line uninterrupted power supply device
  • Off-line uninterrupted power supply device
  • Off-line uninterrupted power supply device

Examples

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Embodiment Construction

[0025] Please refer to figure 1 , figure 2 , image 3 , is a diagram of a preferred embodiment of the off-line uninterruptible power supply of the present invention.

[0026] In this specific embodiment, the off-line uninterruptible power supply unit includes:

[0027] A filtering device 11, coupled to the AC input;

[0028] An AC / DC conversion device 12, the input end of which is coupled to the output end of the filtering device 11, for providing a harmonically shaped DC high voltage to the DC bus;

[0029] A battery 13, which is used to provide DC voltage when the mains power fails;

[0030] A DC / DC conversion device 14, the input end of which is coupled to the output end of the battery 13, for outputting a harmonically shaped DC high voltage to the DC bus;

[0031] A DC / AC conversion device 17, its input terminal is coupled to the DC bus, and its output terminal is coupled to the AC output to output an AC voltage in a harmonic shape. The DC / AC conversion device inclu...

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Abstract

The invention relates to an off-line uninterrupted power supply device, particularly to an off-line uninterrupted power supply device which can output harmonic-shaped AC voltage and has power factor improvement function. The device mainly comprises an AC input coupled to an AC power supply, an AC output coupled to a load end, a DC power supply used for supplying DC voltage, a DC/DC conversion device with the input end coupled to the DC power supply and the output end coupled to a DC bus, a DC/AC conversion device with the input end coupled to the DC bus and the output end coupled to the AC output, and a control circuit; wherein the control circuit controls the uninterrupted power supply device to realize three working modes of supplying harmonic-shaped DC voltage when commercial power is cut off, charging the DC power when the commercial power is normal and charging the DC power supply when the DC bus has excess energy so as to recycle energy.

Description

technical field [0001] The invention relates to an uninterruptible power supply device, especially an improved off-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. Two known off-line uninterruptible power supplies, such as Figure 4 , 5 shown. Figure 4 It is a simple UPS structure. When the mains power is normal, only the mains power is directly connected to the output terminal through the filter device 44 through the relay 45 for use by the load connected to the UPS output end; when the mains power is abnormal (the voltage is too high or too high). low), the UPS converts its internal battery 41 into a high DC voltage through a DC / DC converter 42 (DC / DC converter), and then uses a DC / AC converter 43 to convert the high DC voltage into AC The voltage is switched and outputted through the relay 45 again. Figure 5 It...

Claims

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Application Information

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IPC IPC(8): H02J7/00H02J7/10H02M7/06H02M3/07H02M3/335H02M7/5387H02M1/32H02H7/122
Inventor 王庆文
Owner ALOHA POWER INTEGRATION SHANGHAI
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