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High-efficient UPS

A technology of power supply and voltage source, which is applied in the field of power supply and can solve problems such as energy loss and increased manufacturing cost

Inactive Publication Date: 2007-09-12
NAT SCI & TECH DEV AGENCY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Despite the advantage of portability, however, there is still some energy loss in the low frequency DC / AC converter circuit of this last stage
Due to the low P.F. characteristics of the power supply, designing such a power supply requires at least one pair of large switching devices in the converter circuit, which increases manufacturing cost

Method used

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Examples

Experimental program
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Embodiment approach

[0024] Fig. 3 is a first embodiment of UPS according to the present invention, which uses a load characteristic analysis device. Below are its components: Automatic Switch 1 (SW1) and Automatic Switch 2 (SW2), both of which are connected to the main distributor 220V. The load characteristic analysis circuit 12 will analyze the sensitivity of the load characteristic to the current change. The control device 32 is a logic circuit or a programmable microcontroller whose function is to check the status of the external distributor and control the selection of the automatic switch 1 (SW1) and the automatic switch 2 (SW2) to discharge the load as specified. The control unit 32 receives signals from the load characteristic analysis unit 12 which may consist of discrete components such as individual diodes or digital signal processing together with a microprocessor and / or current detectors. (DSP), which includes a current detector and a voltage detector (not shown in the figure) for d...

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Abstract

Provided is a high frequency UPS obtaining stored energy from the battery by the high frequency electrical source DC / AC converter, which can avoid the huge low frequency transformer. Subsequently, alternating current voltage is commutated to a direct current voltage and released to the load. The load is preferred a personal computer. Although the power coefficient of the load is not equal to 1, it can be corrected to 1. The provided load characteristic analysis apparatus analyzes whether the load able to fit for DC power before UPS outputting direct current voltage to the load. If the UPS is used for the load, such as personal computer, the entire power will be higher and the working hours will be longer in the period of the electrical source shortage. The UPS is more compact and lighter compared to the battery with the same size.

Description

technical field [0001] This invention relates to power supplies, and more particularly to uninterruptible power supplies having a DC voltage output. Background technique [0002] Typically, an uninterruptible power supply is powered by batteries, hence the name "backup UPS", usually having a capacity of less than 3KVA. As shown in Figure 1, a UPS includes a battery charger that converts power from the mains into the battery, a low-frequency power converter, a low-frequency transformer, and an automatic switch. The battery supports the low frequency power converter to generate an AC voltage with a frequency equal to the main voltage frequency (50 Hz or 60 Hz) when the normal power supply is in short supply. The AC voltage from the low frequency AC voltage converter is not a complete sinusoidal waveform and is boosted to the same level as the main voltage supply. Subsequently, the AC voltage from the low frequency transformer is applied to the load through the automatic swit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00H02M3/22H02M7/42H02M1/14
Inventor 苏塔特·帕托姆诺普洪皮塞奴·杜昂塔奴
Owner NAT SCI & TECH DEV AGENCY