{"title":"基于llc的高频锂离子电池充电器时域综合优化","authors":"S. Karimi, F. Tahami","doi":"10.1109/PEDSTC.2019.8697876","DOIUrl":null,"url":null,"abstract":"The LLC resonant converter, as a promising solution for battery charger applications, has the ability to adjust its output voltage during Constant Current and Constant Voltage modes in the charging profile. However, its operation mode changes as switching frequency changes. Therefore, for efficiency-oriented optimizations in battery charger applications, the one-pointed efficiency is not an appropriate objective. To this end, in this paper, a multi-pointed averaged efficiency is considered for optimization along with the transformer volume. Another factor of a proper design for a wide output range LLC is the converter peak voltage gain that is calculated based on an accurate method. The efficiency calculations are carried out by using time-domain-based analysis for every operation points. Regarding dead-time, a worst case is realized during the charging profile. At last, a 500W 400V:48V battery charger is designed with this procedure, and verified by simulation.","PeriodicalId":296229,"journal":{"name":"2019 10th International Power Electronics, Drive Systems and Technologies Conference (PEDSTC)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":"{\"title\":\"A Comprehensive Time-domain-based Optimization of a High-Frequency LLC-based Li-ion Battery Charger\",\"authors\":\"S. Karimi, F. Tahami\",\"doi\":\"10.1109/PEDSTC.2019.8697876\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The LLC resonant converter, as a promising solution for battery charger applications, has the ability to adjust its output voltage during Constant Current and Constant Voltage modes in the charging profile. However, its operation mode changes as switching frequency changes. Therefore, for efficiency-oriented optimizations in battery charger applications, the one-pointed efficiency is not an appropriate objective. To this end, in this paper, a multi-pointed averaged efficiency is considered for optimization along with the transformer volume. Another factor of a proper design for a wide output range LLC is the converter peak voltage gain that is calculated based on an accurate method. The efficiency calculations are carried out by using time-domain-based analysis for every operation points. Regarding dead-time, a worst case is realized during the charging profile. At last, a 500W 400V:48V battery charger is designed with this procedure, and verified by simulation.\",\"PeriodicalId\":296229,\"journal\":{\"name\":\"2019 10th International Power Electronics, Drive Systems and Technologies Conference (PEDSTC)\",\"volume\":\"6 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2019-02-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"3\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2019 10th International Power Electronics, Drive Systems and Technologies Conference (PEDSTC)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/PEDSTC.2019.8697876\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2019 10th International Power Electronics, Drive Systems and Technologies Conference (PEDSTC)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/PEDSTC.2019.8697876","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
A Comprehensive Time-domain-based Optimization of a High-Frequency LLC-based Li-ion Battery Charger
The LLC resonant converter, as a promising solution for battery charger applications, has the ability to adjust its output voltage during Constant Current and Constant Voltage modes in the charging profile. However, its operation mode changes as switching frequency changes. Therefore, for efficiency-oriented optimizations in battery charger applications, the one-pointed efficiency is not an appropriate objective. To this end, in this paper, a multi-pointed averaged efficiency is considered for optimization along with the transformer volume. Another factor of a proper design for a wide output range LLC is the converter peak voltage gain that is calculated based on an accurate method. The efficiency calculations are carried out by using time-domain-based analysis for every operation points. Regarding dead-time, a worst case is realized during the charging profile. At last, a 500W 400V:48V battery charger is designed with this procedure, and verified by simulation.
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