DC/DC circuit for UPS

A circuit and power supply technology, which can be applied to conversion equipment, electrical components, and electrical variables that can be converted to DC without intermediate conversion. low cost effect

Active Publication Date: 2013-07-03
EMERSON NETWORK POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, the cost of uninterruptible power supply is higher

Method used

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  • DC/DC circuit for UPS
  • DC/DC circuit for UPS
  • DC/DC circuit for UPS

Examples

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Embodiment Construction

[0062] The invention provides a DC / DC circuit for an uninterruptible power supply, which simplifies the UPS system and reduces system cost at the same time.

[0063] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0064] Such as image 3 As shown, this figure is a system block diagram of the UPS power supply of the present invention.

[0065] The UPS power supply described in the embodiment of the present invention includes a rechargeable battery B and a UPS power supply control circuit connected thereto. The UPS power supply control circuit includes an input filter circuit 1 , a rectifier circuit 2 , an inverter circuit 3 , a static switch 4 , an output filter circuit 5 , a control circuit 6 and a bidirectional DC / DC circuit 8 .

[0066] The input filter circuit 1 , the rectifier circui...

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Abstract

A DC / DC (direct current / direct current) circuit for a UPS (uninterrupted power supply) is a two-way DC / DC circuit and is connected with a battery and a bus; the two-way DC / DC circuit takes power from the bus to charge the battery in a mains supply mode; when a mains supply is abnormal, the two-way DC / DC circuit is in a working state that the battery supplies the power to the bus; the two-way DC / DC circuit comprises an isolation transformer; a primary side of the isolation transformer is connected with a push-pull circuit or a half-bridge circuit or a full-bridge circuit; a secondary side of the isolation transformer is connected with the push-pull circuit or the half-bridge circuit or the full-bridge circuit; the isolation transformer is provided with a plurality of controllable taps; and the two-way DC / DC circuit selects the taps on the primary side or the secondary side of the isolation transformer to conduct turn ratio switching for adjusting charging and discharging voltage. The DC / DC circuit for the UPS allows a UPS system to be more simplified, and lowers the cost of the system.

Description

technical field [0001] The invention relates to the technical field of uninterruptible power supply, in particular to a DC / DC circuit of uninterruptible power supply. Background technique [0002] In the traditional UPS (Uninterruptible Power System, uninterruptible power supply) power supply, the design of the UPS power charger generally includes the following two types: [0003] The first type, isolated type, generally adopts flyback conversion, and some also use double forward conversion, etc.; [0004] The second type is non-isolated type, which uses BUCK circuit step-down, BUCK-BOOST circuit step-down conversion, etc. [0005] The design idea of ​​the above-mentioned traditional UPS charger is that the charger is set independently. In the UPS power supply, no matter how the charger is connected to the UPS power supply, the charger is an independent component of the UPS power supply. [0006] Such as figure 1 Shown is the first system block diagram of the traditional ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02M3/337H02M5/10
Inventor 倪同宋淼刘峰刘春阳
Owner EMERSON NETWORK POWER CO LTD
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