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A single-stage voltage regulation conversion circuit and control method with shared rectification structure

A technology for converting circuits and control methods, which is applied in circuits, converting DC power input to DC power output, and converting AC power input to DC power output, etc. Loss increases and other problems, to achieve the effect of reducing volume, reducing core loss, and reducing the number of

Active Publication Date: 2021-07-20
WUHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this circuit structure has more switching tubes, which will lead to an increase in the on-state loss of the circuit, and thus cannot further improve the efficiency of the circuit.
At the same time, if a discrete transformer is used, the overall volume of the device will increase, and the core loss will increase.

Method used

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  • A single-stage voltage regulation conversion circuit and control method with shared rectification structure
  • A single-stage voltage regulation conversion circuit and control method with shared rectification structure
  • A single-stage voltage regulation conversion circuit and control method with shared rectification structure

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Embodiment Construction

[0041] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the implementation examples described here are only used to illustrate and explain the present invention, and are not intended to limit this invention.

[0042] The specific embodiment of the present invention is a single-stage voltage regulating conversion circuit and a control method with a shared rectification structure.

[0043] It is characterized in that it includes: a DC power supply, a capacitor voltage divider module, a resonant module, an AC filter module, an energy storage inductor, a first transformer, a second transformer, a first power regulation inverter module, a power regulation rectifier module, and a second power regulation Inverter module, load module, main controller;

[0044] The DC powe...

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Abstract

The invention proposes a single-stage voltage regulation conversion circuit and a control method with a common rectification structure. The system of the present invention includes a DC power supply, a capacitor voltage divider module, a resonance module, an AC filter module, an energy storage inductance, a first transformer, a second transformer, a first electric energy regulation inverter module, an electric energy regulation rectifier module, and a second electric energy regulation inverter module, load module, main controller. The method of the invention can realize the voltage regulation function while realizing high-efficiency energy transmission; the LLC and DAB circuits of the invention share the secondary side rectification circuit, which can reduce the number of switching devices, further improve the efficiency of the circuit, and reduce the cost of the circuit. The invention adopts a phase-shift control mode, and by controlling the phase-shift angle between the bridge arms, it ensures that all switch tubes are turned on at zero voltage and at the same time regulates power transmission.

Description

technical field [0001] The invention relates to the technical field of power electronic conversion, in particular to a single-stage voltage regulation conversion circuit and a control method with a common rectification structure. Background technique [0002] In recent years, LLC resonant converters have been widely used in high-efficiency isolation application scenarios due to their high efficiency and isolation circuit characteristics, such as photovoltaic energy storage, new energy vehicles, solid-state transformers, and low-voltage high-current applications. When the LLC resonant converter operates at the resonant frequency, it can obtain the zero-voltage turn-on (ZVS) of the primary side switch and the zero-current turn-off (ZCS) of the secondary rectifier diode, so that the highest energy conversion efficiency can be obtained. However, when the operating point of the circuit deviates from the resonant operating point, the transformer circulating current of the LLC reso...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335H02M7/797H02M1/088H01F27/30H01F19/08
CPCH01F27/306H02M1/088H02M3/3353H02M7/797H02M1/0074
Inventor 潘尚智王明龙宫金武查晓明
Owner WUHAN UNIV
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