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Bidirectional direct-current converter

A technology of bidirectional DC conversion and inductors, which is applied in the direction of converting DC power input to DC power output, instruments, and adjusting electrical variables, etc., and can solve problems such as single operation mode of bidirectional converters and difficulty in meeting application requirements

Active Publication Date: 2017-05-31
GUANGDONG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the operation mode of the bidirectional converter realized by this scheme is single, and it is difficult to meet the application requirements when the voltage varies in a wide range.

Method used

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Embodiment Construction

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0026] The embodiment of the present invention discloses a bidirectional DC converter, see figure 2 As shown, the converter includes: a full bridge circuit, an inductor L and a first fully controlled device S 1 ;in,

[0027] The full-bridge circuit includes a first half-bridge 11 and a second half-bridge 12, and the first half-bridge 11 includes a second fully-controlled device S 2 and a third fully controlled device S 3 , the second half-bridge 12 include...

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Abstract

The invention discloses a bidirectional direct-current converter. The bidirectional direct-current converter comprises a full-bridge circuit, an inductor and a first full-controlled device, wherein the full-bridge circuit comprises a first half bridge and a second half bridge; the first half bridge comprises a second full-controlled device and a third full-control device; the second half bridge comprises a fourth full-controlled device and a fifth full-controlled device; the first end of the inductor is connected with the middle point of the first half bridge; the second end of the inductor is connected with the middle point of the second half bridge; the third end of the inductor is connected with the input end of the first full-controlled device; the output end of the first full-controlled device is connected with the output ends of third full-controlled device and the fifth full-controlled device. By adopting the bidirectional direct-current converter, the full-bridge circuit, the inductor and the first full-controlled device are utilized, so that the circuit can be switched freely among six bidirectional working modes, the working modes of the bidirectional direct-current converter are increased, and meanwhile the voltage adjustment width is increased.

Description

technical field [0001] The invention relates to the field of direct current conversion circuits, in particular to a bidirectional direct current converter. Background technique [0002] Buck, boost and buck-boost are the three most basic types of power electronics DC power converters. With the popularization of energy storage devices such as power batteries and supercapacitors, bidirectional power electronic power converters have received extensive attention and applications. The simplest bidirectional converter solution is to replace the freewheeling diodes in the above three converters with fully-controlled semiconductor switches. However, the operation mode of the bidirectional converter realized by this scheme is single, and it is difficult to meet the application requirements when the voltage varies in a wide range. [0003] In the prior art, an inductor and a full-bridge structure can be used to freely switch between the three operating modes of the same converter: b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/158
CPCH02M3/1582
Inventor 叶远茂陈思哲章云张桂东
Owner GUANGDONG UNIV OF TECH
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