A New Soft-switched Flyback Converter with a Minimum Number of Elements and High Efficiency

IF 0.6 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Recent Advances in Electrical & Electronic Engineering Pub Date : 2023-05-12 DOI:10.2174/2352096516666230427103110

M. Vesali, Hosein Ranjbar, Mostafa Rabiei

{"title":"A New Soft-switched Flyback Converter with a Minimum Number of\nElements and High Efficiency","authors":"M. Vesali, Hosein Ranjbar, Mostafa Rabiei","doi":"10.2174/2352096516666230427103110","DOIUrl":null,"url":null,"abstract":"\n\nThis paper proposes a new soft-switching flyback converter with a simple structure and high efficiency. The proposed converter has zero current switching conditions for the turning-on distance and zero voltage switching conditions for the turning-off distance of the switch.\n\n\n\nWith a minimum number of elements, a soft switching condition is created for all semiconductor devices, and high efficiency is obtained.\n\n\n\nTo create the ZCS condition, an inductor is used, and when the switch is turned on, the current due to the existence of this inductor increases slowly. But when the switch is turned off, this inductor has an energy that suddenly discharge on the switch, which is then controlled by a capacitor and discharged in capacitor. Then when the energy is discharge in capacitor, this capacitor is connected to the switch, which increases the voltage of the switch slowly and ZVS condition is stablished. Also the energy of leakage inductance in this state is discharged in that same capacitor which eliminates destructive effect of this inductor.\n\n\n\nA prototype of the proposed converter is implemented and tested in 60 W power. The experimental results verified theoretical analysis and shown that soft switching condition is established. Also 92% efficiency at full load is obtained, which shows the efficiency has increased. The current of the diodes in experimental results shows that when the diodes are turned off, ZCS condition is created, therefore reverse recovery problem of the diodes does not exist.\n\n\n\nTherefore, the proposed converter has high efficiency and simple structure, which is suitable to convert AC voltage to DC voltage for the devices power supply.\n","PeriodicalId":43275,"journal":{"name":"Recent Advances in Electrical & Electronic Engineering","volume":"59 1","pages":""},"PeriodicalIF":0.6000,"publicationDate":"2023-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Recent Advances in Electrical & Electronic Engineering","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.2174/2352096516666230427103110","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}

引用次数: 0

Abstract

This paper proposes a new soft-switching flyback converter with a simple structure and high efficiency. The proposed converter has zero current switching conditions for the turning-on distance and zero voltage switching conditions for the turning-off distance of the switch. With a minimum number of elements, a soft switching condition is created for all semiconductor devices, and high efficiency is obtained. To create the ZCS condition, an inductor is used, and when the switch is turned on, the current due to the existence of this inductor increases slowly. But when the switch is turned off, this inductor has an energy that suddenly discharge on the switch, which is then controlled by a capacitor and discharged in capacitor. Then when the energy is discharge in capacitor, this capacitor is connected to the switch, which increases the voltage of the switch slowly and ZVS condition is stablished. Also the energy of leakage inductance in this state is discharged in that same capacitor which eliminates destructive effect of this inductor. A prototype of the proposed converter is implemented and tested in 60 W power. The experimental results verified theoretical analysis and shown that soft switching condition is established. Also 92% efficiency at full load is obtained, which shows the efficiency has increased. The current of the diodes in experimental results shows that when the diodes are turned off, ZCS condition is created, therefore reverse recovery problem of the diodes does not exist. Therefore, the proposed converter has high efficiency and simple structure, which is suitable to convert AC voltage to DC voltage for the devices power supply.

查看原文本刊更多论文

一种新型元件数少、效率高的软开关反激变换器

本文提出了一种结构简单、效率高的软开关反激变换器。该变换器的导通距离为零电流开关条件，关断距离为零电压开关条件。以最少的元件数量，为所有半导体器件创造了软开关条件，并获得了高效率。为了创建ZCS条件，使用了一个电感，当开关打开时，由于该电感的存在，电流缓慢增加。但是当开关关闭时，这个电感有能量突然在开关上放电，然后由电容器控制并在电容器中放电。当电容中的能量放电时，将该电容接在开关上，使开关的电压缓慢升高，达到ZVS状态。在这种状态下，漏电感的能量在同一电容器中放电，从而消除了电感的破坏性影响。本文在60w功率下实现了该变换器的原型并进行了测试。实验结果验证了理论分析的正确性，并证明了软开关条件的建立。满负荷时的效率达到92%，表明效率有所提高。实验结果表明，当二极管关断时，产生ZCS条件，因此不存在二极管的反向恢复问题。因此，该变换器效率高，结构简单，适用于将交流电压转换为直流电压，为器件供电。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Recent Advances in Electrical & Electronic Engineering ENGINEERING, ELECTRICAL & ELECTRONIC-

CiteScore

1.70

自引率

16.70%

发文量

101

期刊介绍： Recent Advances in Electrical & Electronic Engineering publishes full-length/mini reviews and research articles, guest edited thematic issues on electrical and electronic engineering and applications. The journal also covers research in fast emerging applications of electrical power supply, electrical systems, power transmission, electromagnetism, motor control process and technologies involved and related to electrical and electronic engineering. The journal is essential reading for all researchers in electrical and electronic engineering science.