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Uninterruptible power supply, DC-DC converter and control method and control device thereof

A DC-DC, control method technology, applied in the field of converters, can solve the problems of limiting the application range, increasing the cost, increasing the complexity of wire and wiring, etc., achieving small size and volume, low cost and loss, and high power density. Effect

Active Publication Date: 2018-11-13
SANTAK ELECTRONICS SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The rechargeable battery in the bidirectional DC-DC converter must use an even number of batteries or battery packs, which limits its application range
In addition, bringing out the intermediate connection point of the rechargeable battery increases the complexity of wire and wiring, and increases the cost

Method used

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  • Uninterruptible power supply, DC-DC converter and control method and control device thereof
  • Uninterruptible power supply, DC-DC converter and control method and control device thereof
  • Uninterruptible power supply, DC-DC converter and control method and control device thereof

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Embodiment Construction

[0044] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0045] Figure 4 is a circuit diagram of a bidirectional DC-DC converter according to the first embodiment of the present invention. Such as Figure 4 As shown, the bidirectional DC-DC converter 2 includes an inductor L21, an inductor L22, an insulated gate bipolar transistor T21, T22, T23, T24 with anti-parallel diodes D21, D22, D23, D24, and a positive DC bus in series Capacitor C21 and negative DC bus capacitor C22.

[0046] The positive terminal of the positive DC bus capacitor C21 is connected to the positive DC bus 21, the negative terminal of the negative DC bus capacitor C22 is connected to the negative DC bus 22, and the positive DC bus capacitor C21 and the negative DC bus capacitor C22 are connected in series to form a nod...

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Abstract

The invention provides an uninterruptible power supply, a DC-DC converter and a control method and a control device thereof. The DC-DC converter comprises a positive DC bus capacitor, a negative DC bus capacitor, a first switching transistor, a second switching transistor and a bidirectional controllable switching device, wherein the positive DC bus capacitor and the negative DC bus capacitor areconnected in series; the first switching transistor and the second transistor are connected in series between a positive electrode and a negative electrode of a rechargeable battery; one end of the bidirectional controllable switching device is connected to a node formed by the first switching transistor and the second switching transistor, and the other end of the bidirectional controllable switching device is connected to a node formed by the positive DC bus capacitor and the negative DC bus capacitor. The DC-DC converter provided by the invention is low in cost, small in size and high in power density.

Description

technical field [0001] The invention relates to a converter, in particular to an uninterruptible power supply, a DC-DC converter, a control method and a control device thereof. Background technique [0002] A DC-DC converter is an electrical device used in uninterruptible power supplies. The input terminal of the DC-DC converter is connected to the rechargeable battery, and its output terminal is connected to the positive and negative DC bus bars in the uninterruptible power supply. When the mains power fails, the DC-DC converter boosts the DC power in the rechargeable battery and outputs it to the positive and negative DC buses. [0003] figure 1 is a circuit diagram of a prior art bidirectional DC-DC converter. Such as figure 1 As shown, the bidirectional DC-DC converter 1 includes an inductor L11 and an inductor L12, and insulated gate bipolar transistors T11, T12, T13, T13, T14, and a positive DC bus capacitor C11 and a negative DC bus capacitor C12 connected in ser...

Claims

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Application Information

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IPC IPC(8): H02M3/158H02J9/06
CPCH02J9/061H02M3/1584H02M3/1586
Inventor 曹磊
Owner SANTAK ELECTRONICS SHENZHEN
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