Method and device for controlling current of converter and UPS (uninterruptible power supply)

A current control and converter technology, applied in the field of circuits, can solve problems such as inability to adapt to the positive and negative capacitance scenarios of online UPS, and achieve the effect of improving application scalability

Active Publication Date: 2015-01-21
HUAWEI DIGITAL POWER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, based on the existing bidirectional DC converter, its output end is in single-capacitor mode, which cannot adapt to the scene of online UPS positive and negative capacitors. Therefore, there are application limitations

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  • Method and device for controlling current of converter and UPS (uninterruptible power supply)
  • Method and device for controlling current of converter and UPS (uninterruptible power supply)
  • Method and device for controlling current of converter and UPS (uninterruptible power supply)

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Embodiment Construction

[0049] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the Some, but not all, embodiments are invented. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0050] In view of the problem that the existing bidirectional DC converter cannot adapt to the scene of the positive and negative capacitance of the online UPS, the embodiment of the present invention provides a converter that can adapt to the scene of the positive and negative capacitance of the online UPS, and improves the application scalability of the converter .

[0051] ...

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Abstract

The invention provides a method and a device for controlling current of a converter and a UPS (uninterruptible power supply). The converter comprises a battery, a first rectifying circuit, a transformer, a second rectifying circuit, capacitors and a switching device. The second rectifying circuit comprises a first rectifying unit and a second rectifying unit, and the capacitors include a first capacitor and a second capacitor. One end of the first rectifying unit is connected with one end of a secondary edge of the transformer, and the other end of the secondary edge of the transformer is connected with the first capacitor. One end of the second rectifying unit is connected with the other end of the secondary edge of the transformer, and the other end of the second rectifying unit is connected with the second capacitor. One end of the first capacitor is connected with the first rectifying unit, and the other end of the first capacitor is connected with the second capacitor and the switching device. One end of the second capacitor is connected with the second rectifying unit, and the other end of the second capacitor is connected with the first capacitor and the second capacitor, and the other end, connected with the first capacitor and the second capacitor, of the switching device is grounded. The method and the device for controlling current of a converter and the UPS (uninterruptible power supply) are adaptable to online scenes of positive capacitance and negative capacitance of the UPS.

Description

technical field [0001] The invention relates to the field of circuit technology, in particular to a current control method and device for a converter, and an uninterruptible power supply. Background technique [0002] In areas with low power quality, most online uninterruptible power supply (English: uninterruptible power supply, UPS for short) is a long-term machine, which requires a large capacity of UPS battery, for example, the capacity of UPS battery is 100Ah / 12V At the same time, the power of the charging circuit for charging the battery of the UPS also needs several hundred watts. In order to reduce the cost and increase the power density, the DC step-up circuit and the charging circuit of the battery of the UPS are usually integrated through a bidirectional DC converter. [0003] At present, there are many studies on bidirectional DC converters, figure 1 It is the working principle diagram of the existing bidirectional DC converter: convert the mains power into DC ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/28H02J7/00
Inventor 甘健宏杜坤
Owner HUAWEI DIGITAL POWER TECH CO LTD
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