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Composite bridge type dual output LLC resonance converter

A resonant converter, dual output technology, applied in the direction of output power conversion device, AC power input conversion to DC power output, DC power input conversion to DC power output, etc., can solve the problems of large number of power devices and high cost, Achieve the effect of improving power density, reducing current stress, and reducing output voltage and current ripple

Active Publication Date: 2018-06-19
CHONGQING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is the technical problem of large number and high cost of power devices existing in the prior art

Method used

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  • Composite bridge type dual output LLC resonance converter
  • Composite bridge type dual output LLC resonance converter
  • Composite bridge type dual output LLC resonance converter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This embodiment provides a composite bridge dual output LLC resonant converter, such as figure 1 , the composite bridge-type double-output LLC resonant converter includes an input source Uin, a switch network, a resonant network, a transformer, a rectification and filtering network, and a load connected in sequence; the transformer voltage divider includes a first transformer T1 and a second transformer T2, The first transformer is composed of two primary windings Np1, Np2 and secondary winding Ns1, the second transformer is composed of primary winding Np3 and secondary winding Ns2; the switch network includes a first switching tube Q1 and a second switching tube Q2 , the third switching tube Q3 and the fourth switching tube Q4; the rectification filter network includes a first rectification filter network and a second rectification filter network; the load includes a first load Ro1 and a second load Ro2; the resonance The network includes a first resonant cavity, a sec...

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PUM

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Abstract

The invention relates to a composite bridge type dual output LLC resonance converter and solves technical problems of the large quantity of power devices and high cost. The composite bridge type dualoutput LLC resonance converter comprises an input source Uin, the switch network, the resonance network, a transformer, the rectifier filter network and a load which are sequentially connected, wherein the transformer comprises a first transformer T1 and a second transformer T2, the first transformer is composed of two primary windings Np1 and Np2 and a secondary winding Ns1, the second transformer is composed of a primary winding Np3 and a secondary winding Ns2, the switch network comprises a first switch tube Q1, a second switch tube Q2, a third switch tube Q3 and a fourth switch tube Q4, the rectifier filter network comprises a first rectifier filter network and a second rectifier filter network, and the load comprises a first load Ro1 and a second load Ro2. The composite bridge type dual output LLC resonance converter is advantaged in that the composite bridge type dual output LLC resonance converter can be applied to the communication, aerospace, new energy grid connection, electric car and LED illumination fields.

Description

technical field [0001] The invention relates to the application field of power electronic power conversion, in particular to a composite bridge-type double-output LLC resonant converter. Background technique [0002] In recent years, with the global energy crisis, environmental pollution and other issues highlighted. How to efficiently use electric energy has become an important research topic in today's academic circles. As the interface between the power grid and the load, DC / DC aims to efficiently provide high-quality electric energy for various electrical equipment. The three-element resonant DC-DC converter was proposed in the early 1990s, but it was not further studied and widely used due to the complexity of the control and the lack of suitable frequency conversion control integrated chips at that time. In recent years, the bottleneck problems of circulating current loss and duty cycle loss of medium and high-power isolated soft-switching DC-DC converters represente...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02M7/48
CPCH02M3/33569H02M7/48H02M7/4815Y02B70/10
Inventor 管春娄哲理龙江航王俊杰
Owner CHONGQING UNIV OF POSTS & TELECOMM