{"title":"400V/12V无规LLC变换器中pcb -绕组矩阵变压器的设计优化","authors":"P. Prakash, Ahmed Nabih, Qiang Li","doi":"10.1109/ECCE47101.2021.9595190","DOIUrl":null,"url":null,"abstract":"Isolated high-output-current DC/DC converters are critical technologies for future datacenter power architecture. LLC converters with matrix transformers are suitable for these applications due to their high efficiency and high power density. Previously, The Center for Power Electronics Systems (CPES) proposed a PCB-winding based matrix transformer for a 400V/12V 1MHz unregulated LLC converter. This paper aims to further improve the efficiency of the converter, without compromising on the power density, by optimizing the switching frequency of the converter, and mitigating the current sharing issues associated with center-tap rectifiers and shielding in matrix transformers with multiple outputs. The elimination of these issues is critical because they can lead to non-uniform increases in device temperatures and a reduction in the overall efficiency of the converter. The proposed improvements are verified by developing a 1 kW prototype with a peak efficiency of 98.05% and a power density of 940 W/in3","PeriodicalId":349891,"journal":{"name":"2021 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2021-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":"{\"title\":\"Design Optimization of PCB-Winding Matrix Transformer for 400V/12V Unregulated LLC Converter\",\"authors\":\"P. Prakash, Ahmed Nabih, Qiang Li\",\"doi\":\"10.1109/ECCE47101.2021.9595190\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Isolated high-output-current DC/DC converters are critical technologies for future datacenter power architecture. LLC converters with matrix transformers are suitable for these applications due to their high efficiency and high power density. Previously, The Center for Power Electronics Systems (CPES) proposed a PCB-winding based matrix transformer for a 400V/12V 1MHz unregulated LLC converter. This paper aims to further improve the efficiency of the converter, without compromising on the power density, by optimizing the switching frequency of the converter, and mitigating the current sharing issues associated with center-tap rectifiers and shielding in matrix transformers with multiple outputs. The elimination of these issues is critical because they can lead to non-uniform increases in device temperatures and a reduction in the overall efficiency of the converter. The proposed improvements are verified by developing a 1 kW prototype with a peak efficiency of 98.05% and a power density of 940 W/in3\",\"PeriodicalId\":349891,\"journal\":{\"name\":\"2021 IEEE Energy Conversion Congress and Exposition (ECCE)\",\"volume\":\"1 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2021-10-10\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"3\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2021 IEEE Energy Conversion Congress and Exposition (ECCE)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/ECCE47101.2021.9595190\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2021 IEEE Energy Conversion Congress and Exposition (ECCE)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ECCE47101.2021.9595190","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Design Optimization of PCB-Winding Matrix Transformer for 400V/12V Unregulated LLC Converter
Isolated high-output-current DC/DC converters are critical technologies for future datacenter power architecture. LLC converters with matrix transformers are suitable for these applications due to their high efficiency and high power density. Previously, The Center for Power Electronics Systems (CPES) proposed a PCB-winding based matrix transformer for a 400V/12V 1MHz unregulated LLC converter. This paper aims to further improve the efficiency of the converter, without compromising on the power density, by optimizing the switching frequency of the converter, and mitigating the current sharing issues associated with center-tap rectifiers and shielding in matrix transformers with multiple outputs. The elimination of these issues is critical because they can lead to non-uniform increases in device temperatures and a reduction in the overall efficiency of the converter. The proposed improvements are verified by developing a 1 kW prototype with a peak efficiency of 98.05% and a power density of 940 W/in3
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