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Low-power UPS

A low-power, transformer technology, applied in electrical components, emergency power arrangements, circuit devices, etc., can solve problems such as inability to work, large isolation transformers, and reduced UPS reliability, and achieve high reliability and small size.

Inactive Publication Date: 2016-12-07
EAST GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The volume of the isolation transformer is large, which is not conducive to the miniaturization of UPS
In addition, the mains mode and the battery mode share the transformer T1. If the transformer T1 fails, both the mains mode and the battery mode of the UPS will not work, reducing the reliability of the UPS.

Method used

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Examples

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Embodiment Construction

[0014] The invention will be described in detail below in conjunction with specific embodiments.

[0015] like figure 2 As shown, the low-power UPS of this embodiment includes an input filter unit 1, an input relay REL1, a transformer T1, a charging unit 2, a battery BAT, a DC / DC conversion unit 3, an inverter unit 4 and an output relay REL3, and the transformer T1 is an automatic The coupling transformer, the DC / DC conversion unit 3 is a boost circuit, the output relay REL3 constitutes the output unit, the IN terminal is the mains input terminal, and the OUT terminal is the output terminal of the low-power UPS in this embodiment.

[0016] When the mains is normal, the input relay REL1 pulls in, and the output relay REL3 connects the output terminal of the transformer T1 to the output terminal OUT of the low-power UPS of this embodiment, thereby switching the working mode of the low-power UPS of this embodiment to the mains mode . After the input filter unit 1 filters the m...

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PUM

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Abstract

The invention discloses a low-power UPS, and relates to the technical field of the uninterruptible power supply (UPS). The low-power UPS comprises a storage battery, a charging unit, an inversion unit, a transformer for voltage stabilization, and an output unit which is used for outputting outwardly, wherein when the low-power UPS works in a mains supply mode, the charging unit takes power from the mains supply to charge the storage battery; the transformer takes power from the mains supply, performs voltage stabilization and then outputs the power to the output unit; the transformer is an autotransformer; the low-power UPS also comprises a DC / DC conversion unit; when the low-power UPS works in a battery mode, the electric energy output by the storage battery is subjected to voltage conversion by the DC / DC conversion unit, and then the electric energy is output to the inversion unit; and next, the electric energy is inverted into alternating current by the inversion unit, and finally the alternating current is output to the output unit.

Description

technical field [0001] The invention relates to the technical field of uninterruptible power supply, in particular to a low-power UPS. Background technique [0002] A UPS (Uninterruptible Power Supply) is a power protection device that includes a battery. When the mains is normal, it stabilizes the mains to output electric energy with stable voltage to the load, and at the same time charges the battery. This working mode is called the mains mode; when the mains is abnormal, the electric energy stored in the battery is charged Output to the load after inverter and voltage conversion. On the one hand, the load will not be powered off. On the other hand, it can also isolate the load from the abnormal mains environment and provide the load with stable and high-quality power for its work. This working mode Called battery mode. The UPS has at least the above two working modes, and switches between them according to the mains conditions. [0003] For low-power UPS, the mains mod...

Claims

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Application Information

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IPC IPC(8): H02J9/04
Inventor 梁宇
Owner EAST GRP CO LTD
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