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Photovoltaic system DC-DC full-bridge converter based on soft switching technology

A DC-DC, full-bridge converter technology, applied in photovoltaic power generation, control/regulation systems, output power conversion devices, etc., can solve problems such as increased switching loss and reduced circuit efficiency, achieve efficient control, and ensure safety and reliability. Effect

Inactive Publication Date: 2014-09-17
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The switching loss of the DC-DC converter under hard switching will increase proportionally, the efficiency of the circuit will be greatly reduced, and serious electromagnetic interference (EMI) noise will be generated

Method used

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  • Photovoltaic system DC-DC full-bridge converter based on soft switching technology
  • Photovoltaic system DC-DC full-bridge converter based on soft switching technology
  • Photovoltaic system DC-DC full-bridge converter based on soft switching technology

Examples

Experimental program
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Embodiment Construction

[0020] like figure 1 As shown, the signal output terminal of the phase-shift control module UC1 is connected to the control terminal of the power conversion module UC2 through the isolation module and the drive amplifier module. The isolation module is composed of four isolation chips U3, U4, U5, and U6, and the drive amplifier module is composed of two It is composed of drive amplifier chips U1 and U2. The input terminal of the power conversion module UC2 is connected to the low-voltage DC output terminal of the photovoltaic system, the AC output terminal of the power conversion module UC2 is connected to the primary side of the AC transformer TR1, and the secondary side of the AC transformer TR1 is connected to the rectification and filtering module UC3.

[0021] like figure 2 As shown, the phase-shift control module adopts the phase-shift control chip UC3879. like image 3 As shown, two isolation chips and one driver amplifier chip constitute a group of isolated drive c...

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Abstract

The invention relates to a photovoltaic system DC-DC full-bridge converter based on a soft switching technology. The photovoltaic system DC-DC full-bridge converter based on the soft switching technology is characterized in that the signal output end of a phase-shifting control module is connected with the control end of a power conversion module via an isolation module and a driving amplification module, the input end of the power conversion module is connected with the low-voltage DC output end of a photovoltaic system, the alternating current output end of the power conversion module is connected with the primary side of an alternating current transformer, and the secondary side of the alternating current transformer is connected with a rectifier and filter module.

Description

technical field [0001] The invention relates to a photovoltaic system DC-DC full-bridge converter based on soft switching technology. Background technique [0002] Energy shortage is a severe challenge faced by all countries, and the development of renewable solar energy has always been an international key issue. Photovoltaic systems can convert solar energy into electrical energy, and achieve power amplification through DC-DC conversion to achieve grid connection with the power system to provide electrical energy for people's daily use. Accordingly, the research and application of DC-DC conversion technology for photovoltaic systems have made significant progress in recent years. However, most of the current DC-DC converters use "hard switching" technology. As the switching frequency increases, the switching stress on the device increases, and the switching loss also increases. The switching loss of the DC-DC converter under hard switching will increase proportionally, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335
CPCY02B70/1491Y02E10/56Y02B70/10
Inventor 赵凯岐李家斌刘胜王宇超
Owner HARBIN ENG UNIV
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