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A Half-Bridge-Full-Bridge Combined DC Converter Based on Component Multiplexing

A technology of DC converters and components, applied in the direction of converting DC power input to DC power output, electrical components, output power conversion devices, etc., which can solve the problems of narrow range of soft switching of the lagging bridge arm, rectifier diode voltage oscillation, and duty cycle Ratio loss and other issues, to achieve the effect of widening the soft switching range, reducing output ripple, and ensuring continuity

Active Publication Date: 2020-03-20
SHANTOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the practical application of the traditional phase-shifted full-bridge converter, there are mainly the following problems: voltage oscillation of the rectifier diode, narrow soft switching range of the lagging bridge arm, circulation loss on the primary side, and loss of duty cycle

Method used

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  • A Half-Bridge-Full-Bridge Combined DC Converter Based on Component Multiplexing
  • A Half-Bridge-Full-Bridge Combined DC Converter Based on Component Multiplexing
  • A Half-Bridge-Full-Bridge Combined DC Converter Based on Component Multiplexing

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Embodiment Construction

[0019] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0020] The schematic diagram of the circuit connection of the patent of the present invention is as follows: figure 1 As shown, a half-bridge-full-bridge combined DC converter based on component multiplexing, including the first to fourth switching tubes (Q 1 ~Q 4 ), the first and second isolation transformers (T 1 , T 2 ), the first to fourth rectifier diodes (D 1 ~D 4 ), the first to fourth capacitors (C 1 、C 2 、C b 、C o ), DC power supply (V in ) and filter inductor (L o ), transformer T 1 Including the primary winding n p and the secondary winding n s , Transformer T 2 Including the primary winding m p and the secondary winding m s1 、m s2 .

[0021] The first to fourth switching tubes constitute a full bridge circuit, which are positively con...

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Abstract

Embodiments of the invention disclose a half-bridge-full-bridge combined DC converter based on component reuse. On the basis of a full-bridge structure comprising a DC power source, an inverter bridgearm, an isolation transformer, a DC blocking capacitor, and a rectifying and filter circuit, an auxiliary transformer and a voltage dividing capacitor are introduced, and a half-bridge structure is formed by reusing the inverter bridge arm. The two structures adopt full-bridge rectification and full-wave rectification methods on secondary sides, respectively. Through reusing a group of rectifierdiodes, the two structures are connected in series and are combined, to realize reuse of a filter circuit. The DC converter has characteristics of wide zero voltage switching range, no loop current loss, small current ripple, and has a simple circuit structure and high conversion efficiency.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a half-bridge-full-bridge combined DC converter based on component multiplexing. Background technique [0002] In power electronic equipment, the function of the DC converter is to convert the DC signal into another DC quantity with a fixed or adjustable voltage. The research on the DC converter has also attracted extensive attention from practitioners of power electronics technology at home and abroad. According to the number of switching tubes contained in the DC converter, it can be divided into three topologies: single-tube, double-tube and full-bridge. Generally speaking, the power level of the DC converter is proportional to the number of switch tubes. The full-bridge converter composed of four switch tubes has the highest power level. When the phase-shift control mode is adopted, the switch tubes can realize soft switching, and The switching frequency is fixed, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/28H02M3/335
CPCH02M3/28H02M3/33523H02M3/3353Y02B70/10
Inventor 赵雷范衠施羿
Owner SHANTOU UNIV
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