{"title":"同步降压变换器零电压开关与交错的数字变频控制","authors":"Pål Andreassen, G. Guidi, T. Undeland","doi":"10.1109/EPEPEMC.2006.4778396","DOIUrl":null,"url":null,"abstract":"When a synchronous buck converter is operated with zero voltage switching (ZVS) and fixed frequency, the direction of the current in the output inductor is alternated each switching period. Thus the output current ripple of the converter is high to ensure zero voltage switching operation at maximum load. With interleaved outputs this leads to high circulating currents at low loads. In this paper, to minimize circulating currents at low loads, solutions for digital control of ZVS with variable switching frequency and interleaving control for bidirectional power flow are presented. The methods have been implemented in a DSP and verified by measurements.","PeriodicalId":401288,"journal":{"name":"2006 12th International Power Electronics and Motion Control Conference","volume":"195 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2006-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"16","resultStr":"{\"title\":\"Digital Variable Frequency Control for Zero Voltage Switching and Interleaving of Synchronous Buck Converters\",\"authors\":\"Pål Andreassen, G. Guidi, T. Undeland\",\"doi\":\"10.1109/EPEPEMC.2006.4778396\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"When a synchronous buck converter is operated with zero voltage switching (ZVS) and fixed frequency, the direction of the current in the output inductor is alternated each switching period. Thus the output current ripple of the converter is high to ensure zero voltage switching operation at maximum load. With interleaved outputs this leads to high circulating currents at low loads. In this paper, to minimize circulating currents at low loads, solutions for digital control of ZVS with variable switching frequency and interleaving control for bidirectional power flow are presented. The methods have been implemented in a DSP and verified by measurements.\",\"PeriodicalId\":401288,\"journal\":{\"name\":\"2006 12th International Power Electronics and Motion Control Conference\",\"volume\":\"195 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2006-08-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"16\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2006 12th International Power Electronics and Motion Control Conference\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/EPEPEMC.2006.4778396\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2006 12th International Power Electronics and Motion Control Conference","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/EPEPEMC.2006.4778396","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Digital Variable Frequency Control for Zero Voltage Switching and Interleaving of Synchronous Buck Converters
When a synchronous buck converter is operated with zero voltage switching (ZVS) and fixed frequency, the direction of the current in the output inductor is alternated each switching period. Thus the output current ripple of the converter is high to ensure zero voltage switching operation at maximum load. With interleaved outputs this leads to high circulating currents at low loads. In this paper, to minimize circulating currents at low loads, solutions for digital control of ZVS with variable switching frequency and interleaving control for bidirectional power flow are presented. The methods have been implemented in a DSP and verified by measurements.
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