Sine wave generation circuit and uninterruptible power supply system using the same

A technology of power supply system and sinusoidal waveform, which is applied in circuit devices, emergency power supply arrangements, battery circuit devices, etc., can solve the problems of low efficiency, heavy weight, and low efficiency of UPS, and achieve the effect of reducing weight and miniaturizing weight

Inactive Publication Date: 2004-06-02
WORLD TOPTEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing UPS cannot generate sine waves correctly
Therefore, the efficiency of the existing UPS is low
Existing UPSs are bulky and heavy
Also, existing UPS cannot be properly used for mobile products
[0018] Just as when boosting the DC power of the battery 103, a linear transformer 107 is applied, where there is a problem that the existing UPS is inefficient, bulky and heavy
For this reason, so far no amplifier with high fidelity performance has been commercialized

Method used

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  • Sine wave generation circuit and uninterruptible power supply system using the same
  • Sine wave generation circuit and uninterruptible power supply system using the same
  • Sine wave generation circuit and uninterruptible power supply system using the same

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Embodiment Construction

[0055] Now, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0056] figure 2 A block diagram of a class D-amplifier according to the present invention is illustrated.

[0057] Such as figure 2 As shown, the class D-amplifier of the present invention comprises first converting means SW1 for receiving direct current (DC) power stored in a battery (not shown); second converting means SW2 for receiving the DC power; The fourth switching device SW4 connected to the first switching device SW1 through the path (A→B) between the first node A and the second node B; through the path (B→A) between the second node B and the first node A ) is connected to the third switching device SW3 of the second switching device SW2; the second inductive device L2 arranged on the path (A-B) between the first node and the second node B; arranged between the first node A and the second inductive device L2 The first inductance d...

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Abstract

A sine wave generation circuit and an uninterruptible power supply system (UPS) using the same, and more particularly, a sine wave generation circuit and a UPS using the same, which can output a sine wave for direct current (DC) power from a battery. In the UPS, a rectifier rectifies commercial alternating current (AC) power from an input terminal and converts the AC power into DC power. A charger charges a battery with the DC power. The battery provides the DC power. A DC-DC converter boosts and / or drops the DC power inputted from the battery by a predetermined level of the AC power. A D-class amplifier receives the DC power from the DC-DC converter and outputs a sine waveform power signal in response to a waveform control signal. A sine waveform controller controls a sine waveform generation operation of the D-class amplifier. A switching unit switches the commercial AC power from the input terminal to a load in a normal mode, and switches the sine waveform power signal from the D-class amplifier to the load when an error of the commercial AC power is detected.

Description

technical field [0001] The present invention relates to a sine wave generating circuit and an uninterruptible power supply system (UPS) using the circuit, in particular to a sine wave generating circuit for direct current (DC) power stored in a battery to output a sine wave and the use of the sine wave generating circuit uninterruptible power system (UPS). Background technique [0002] All electronic products that use commercial electricity receive sine waves in order to function properly. When an electronic product is used as a mobile electronic product or a backup device, the electronic product must be provided with power corresponding to commercial electricity. Mobile electronic products that use commercial alternating current (AC) power include commercial lasers and lighting equipment (100W-500W), measurement equipment installed on dedicated vehicles to perform various inspections (100W-1KW), dedicated televisions or refrigerators for buses (100W -1KW) and so on. More...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J9/00H02J9/06H02M7/48H02M7/5387
CPCH02J9/062H02J9/00
Inventor 李东香李永寿
Owner WORLD TOPTEC
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