{"title":"一种新的LLC DC/DC谐振变换器限流方法","authors":"Feiyue Duan, Ming Xu, Xu Yang, Yuan Yao","doi":"10.1109/EPE.2014.6910749","DOIUrl":null,"url":null,"abstract":"Constant current control is a difficult issue for LLC resonant converter due to its variable frequency operation. After detailed analysis on the short circuit operation of conventional LLC DC-DC converter, a novel current-limiting method with the help of diode clamping is proposed. Against the conventional wisdom, the switching frequency is reduced toward zero to control the output current under over-load and short circuit condition ultimately. By doing so, the ultra-high frequency operation can be avoided for current-limiting at short circuit. A 480W 12V/40A prototype with proposed concept has been built to verify the theoretical analysis.","PeriodicalId":6508,"journal":{"name":"2014 16th European Conference on Power Electronics and Applications","volume":"100 1","pages":"1-10"},"PeriodicalIF":0.0000,"publicationDate":"2014-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":"{\"title\":\"A novel current-limiting method for LLC DC/DC resonant converter\",\"authors\":\"Feiyue Duan, Ming Xu, Xu Yang, Yuan Yao\",\"doi\":\"10.1109/EPE.2014.6910749\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Constant current control is a difficult issue for LLC resonant converter due to its variable frequency operation. After detailed analysis on the short circuit operation of conventional LLC DC-DC converter, a novel current-limiting method with the help of diode clamping is proposed. Against the conventional wisdom, the switching frequency is reduced toward zero to control the output current under over-load and short circuit condition ultimately. By doing so, the ultra-high frequency operation can be avoided for current-limiting at short circuit. A 480W 12V/40A prototype with proposed concept has been built to verify the theoretical analysis.\",\"PeriodicalId\":6508,\"journal\":{\"name\":\"2014 16th European Conference on Power Electronics and Applications\",\"volume\":\"100 1\",\"pages\":\"1-10\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2014-09-29\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"4\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2014 16th European Conference on Power Electronics and Applications\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/EPE.2014.6910749\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2014 16th European Conference on Power Electronics and Applications","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/EPE.2014.6910749","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
A novel current-limiting method for LLC DC/DC resonant converter
Constant current control is a difficult issue for LLC resonant converter due to its variable frequency operation. After detailed analysis on the short circuit operation of conventional LLC DC-DC converter, a novel current-limiting method with the help of diode clamping is proposed. Against the conventional wisdom, the switching frequency is reduced toward zero to control the output current under over-load and short circuit condition ultimately. By doing so, the ultra-high frequency operation can be avoided for current-limiting at short circuit. A 480W 12V/40A prototype with proposed concept has been built to verify the theoretical analysis.
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