High-gain bidirectional soft switching DC/DC converter based on full-coupling inductor

A technology of coupled inductance and soft switching, which is applied in the field of high-gain bidirectional soft-switching DC/DC converters, can solve the problem that the input and output terminals cannot be exchanged at will, and achieve the effect of simple control method

Active Publication Date: 2020-04-28
XIAN TECHNOLOGICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention provides a high-gain bidirectional soft-switching DC / DC converter based on fully coupled inductors, which solves the problem that the input and output terminals of the DC / DC conversion system cannot be freely exchanged in the prior art

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  • High-gain bidirectional soft switching DC/DC converter based on full-coupling inductor
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  • High-gain bidirectional soft switching DC/DC converter based on full-coupling inductor

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Embodiment Construction

[0021] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0022] In the existing bidirectional DC / DC conversion system, its input and output terminals cannot be exchanged at will, that is, when boosting or stepping down, one terminal must be designated as the output, and the other terminal as the output. The energy transmission system composed of this type of DC / DC has certain limitations on the input or output voltage. When any end of the DC / DC converter designed in the present invention is used as an input, it can...

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Abstract

The invention relates to a high-gain bidirectional soft switching DC/DC converter based on a full-coupling inductor. The high-gain bidirectional soft switching DC/DC converter comprises six switchingtubes S1, S2, S3, S4, S5, S6, four inductors L1, L2, L3, L4, an independent inductor Ls, an input capacitor Cin and an output capacitor Cout. Due to the symmetry, the two sides of the converter can beused as input or output. According to the invention, either end of the structure can be used as an input end or an output end, the purpose of boosting or reducing voltage can be achieved when eitherend is used as an input end. According to the structure, a soft switching technology can be realized when bidirectional energy flow is realized; and the structure is simple in control method, and theoutput voltage control idea is the same as the traditional Buck/Boost control idea.

Description

technical field [0001] The invention relates to the technical field of power energy conversion, in particular to a high-gain bidirectional soft-switching DC / DC converter based on fully coupled inductance. Background technique [0002] In a low-voltage distributed energy system, a step-up DC / DC converter is required to convert the low-voltage source to a high-voltage source and then connect the load. It first needs to boost the low voltage to generate the required AC mains voltage, that is, a DC / DC converter with a higher step-up ratio is required in practical applications. Secondly, since most power systems start and brake, there will be energy flow, that is: energy can flow in both directions in the converter. Therefore, a high-gain, high-efficiency, high-power-density bidirectional DC / DC converter is a requirement for most voltage conversion systems. [0003] Some researchers add additional peripheral circuits to realize Boost soft switching, but it requires more diodes,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/158
CPCH02M3/1584H02M1/0058Y02B70/10
Inventor 付永升李翰山闫克丁雷鸣高俊钗
Owner XIAN TECHNOLOGICAL UNIV
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