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Three-phase LLC resonant direct-current converter

A resonant DC and converter technology, applied in the field of three-phase LLC resonant DC converters, can solve the problems of a large number of internal components, a large volume of the converter, and a high circuit cost, and achieve the effect of reducing cost and volume

Active Publication Date: 2021-03-26
SUNGROW POWER SUPPLY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The transformer adopts a star-connected three-phase LLC DC resonant converter, and its structure diagram is shown in figure 1 As shown, although it has the ability of self-current sharing, but the number of internal components is large, resulting in high circuit cost and large converter volume

Method used

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  • Three-phase LLC resonant direct-current converter
  • Three-phase LLC resonant direct-current converter
  • Three-phase LLC resonant direct-current converter

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Embodiment Construction

[0036] 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.

[0037] In this application, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes none. other elements specifically listed, or also include elements inherent in such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "com...

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Abstract

The invention provides a three-phase LLC resonant direct-current converter, which is characterized in that an interphase circuit is arranged between two phases of each group of adjacent phases on at least one side between an alternating-current side of a primary side circuit and a primary side of a transformer and at least two groups of adjacent phases in three groups of adjacent phases, so that function multiplexing during power transmission can be realized; namely, compared with the prior art, the three-phase LLC resonant DC converter provided by the invention realizes three-phase conversionenergy transmission through multiplexing of the two interphase circuits, and the cost and size of the circuit are reduced.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a three-phase LLC resonant DC converter. Background technique [0002] The three-phase LLC DC resonant converter has many advantages, such as simple circuit structure, high power, high efficiency, small capacitor ripple, etc. Therefore, it has very important application value in various occasions of energy transmission; and, three-phase The LLC DC resonant converter can realize soft switching in the whole load range, and it has self-current sharing ability when its transformer is connected in star shape. [0003] The transformer adopts a star-connected three-phase LLC DC resonant converter, and its structure diagram is shown in figure 1 As shown, although it has self-leveling current capability, the number of internal components is large, resulting in high circuit cost and large converter volume. Contents of the invention [0004] In view of this, an embodiment of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02M3/28H02M7/48
CPCH02M3/33584H02M3/28H02M7/48Y02B70/10
Inventor 庄加才王涵宇徐君刘威
Owner SUNGROW POWER SUPPLY CO LTD
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