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Efficient bidirectional DC-DC converter

A DC-DC and converter technology, applied in the field of high-efficiency bidirectional DC-DC converters, can solve the problems of high step-up and step-down ratios, which cannot be obtained, and achieve the effect of high step-up and step-up ratios

Inactive Publication Date: 2017-07-25
深圳市奥耐电气技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the traditional DC-DC converter, it can obtain a higher buck-boost ratio, but its buck-boost ratio is generally only more than 10 times, and it cannot get a higher buck-boost ratio.

Method used

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  • Efficient bidirectional DC-DC converter

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Embodiment Construction

[0020] In order to make those skilled in the art more clearly understand the purpose, technical solutions and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] refer to figure 1 , figure 1 A schematic diagram of the block principle of the high-efficiency bidirectional DC-DC converter 10 of the present invention is shown. As shown in the drawings, the high-efficiency bidirectional DC-DC converter 10 includes a capacitor circuit 13, a first isolated bidirectional DC-DC conversion circuit 11, a second isolated bidirectional DC-DC conversion circuit 12, and a filter capacitor C3. The circuit includes a fourth capacitor C4 and a fifth capacitor C5 connected in series with the fourth capacitor C4, the two ends of the capacitor circuit 13 serve as the first connection end of the high-efficiency bidirectional DC-DC converter 10, and the fourth capacitor C4 The two ends of...

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PUM

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Abstract

The invention discloses an efficient bidirectional DC-DC converter comprising a capacitor circuit, a first isolated bidirectional DC-DC conversion circuit, a second isolated bidirectional DC-DC conversion circuit, and a filter capacitor. The capacitor circuit comprises a fourth capacitor and a fifth capacitor connected in series therewith. Both ends of the capacitor circuit are used as a first connection terminal of the efficient bidirectional DC-DC converter. Both ends of the fourth capacitor are connected with both ends of the input side of the first isolated bidirectional DC-DC conversion circuit respectively. Both ends of the fifth capacitor are connected with both ends of the input side of the second isolated bidirectional DC-DC conversion circuit respectively. The output end of the first isolated bidirectional DC-DC conversion circuit is connected to the output end of the second isolated bidirectional DC-DC conversion circuit and is connected to the filter capacitor. Both ends of the filter capacitor are used as the second connection terminal of the efficient bidirectional DC-DC converter.

Description

technical field [0001] The invention relates to the technical field of power conversion, in particular to a high-efficiency bidirectional DC-DC converter. Background technique [0002] The bidirectional DC-DC converter is a DC / DC converter that can adjust the bidirectional transmission of energy according to the needs. It is mainly used in DC uninterruptible power supply systems, aerospace power systems, DC motor drive systems, hybrid energy electric vehicles and other occasions. Isolated bidirectional DC-DC converters use transformers to achieve electrical energy conversion with electrical insulation by utilizing magnetic coupling. In the existing isolated bidirectional DC-DC converter, since the turn ratio of the primary and secondary coils of the transformer can be reasonably designed according to needs, a corresponding voltage can be obtained to realize voltage conversion. [0003] In many applications, the input voltage of the DC power supply is high, and the output vo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335
CPCH02M3/3353
Inventor 向小路周虎陈明福
Owner 深圳市奥耐电气技术有限公司
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