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Variable structure combined LLC resonant converter

A resonant converter and combined technology, applied in the direction of converting DC power input to DC power output, instruments, adjusting electrical variables, etc., can solve the problems of increased conduction loss, inability to ensure high working efficiency, etc., and achieve high overall efficiency. Widen the gain range and realize the effect of mode switching

Active Publication Date: 2021-01-15
XINXIANG TAIHANG JIAXIN ELECTRIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when the LLC resonant converter operates in a wide gain state, the operating frequency will be far away from the resonant frequency, the conduction loss will increase, and high operating efficiency cannot be guaranteed in a wide input or wide output voltage range

Method used

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  • Variable structure combined LLC resonant converter
  • Variable structure combined LLC resonant converter
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Embodiment Construction

[0046] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0047] It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circums...

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Abstract

The invention discloses a variable structure combined LLC resonant converter. The converter comprises a direct current source, a square wave generator, a combined resonance circuit, a combined transformer, a combined rectification filter circuit and a load, wherein the combined resonance circuit includes a first LLC resonance circuit and a second LLC resonance circuit; the combined transformer includes a first transformer and a second transformer; the direct-current source is connected with the square-wave generator; the square-wave generator is connected with the combined resonance circuit, the combined resonance circuit is connected with a primary side of the combined transformer, and a secondary side of the combined transformer is connected with the combined rectification filter circuit; and the combined rectification filter circuit is connected with the load. According to the variable structure combined LLC resonant converter, four working modes can be combined and converted, a gain range of the converter can be widened, stable output can be guaranteed through mode transition, conduction losses are not increased due to the added rectifying device, and the advantages of the LLCresonant converter are reserved.

Description

technical field [0001] The invention relates to the technical field of power electronic converters, in particular to a variable structure combined LLC resonant converter. Background technique [0002] With the wide application of power electronics technology in new energy power generation, electric vehicle on-board charging and other fields, high-efficiency, wide-gain DC converters have become a current research hotspot. [0003] The LLC resonant converter can realize the zero-voltage turn-on of the switching tube and the zero-current turn-off of the rectifier diode, effectively reducing the switching loss and improving the overall efficiency of the converter; the control method is pulse frequency modulation, and the modulation method is simple and easy to implement; at the same time, the high-frequency work The utilization of state, transformer excitation inductance and leakage inductance is conducive to reducing the volume of magnetic components and improving the power den...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335
CPCH02M3/33569H02M1/0058Y02B70/10
Inventor 杨秋霞陈乐赵清林王德玉贺宏胜郭栋
Owner XINXIANG TAIHANG JIAXIN ELECTRIC TECH CO LTD
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