Shubhangi Gurudiwan, Rees Hatch, Mahmoud Mansour, Hongjie Wang, R. Zane
{"title":"An 18 kW Battery Charger Module for Extreme Fast Charging Applications Using an Unfolding-Based AC-DC Topology","authors":"Shubhangi Gurudiwan, Rees Hatch, Mahmoud Mansour, Hongjie Wang, R. Zane","doi":"10.1109/APEC43580.2023.10131542","DOIUrl":null,"url":null,"abstract":"This paper proposes a high-performance Unfolder-based single-stage ac-dc converter for electric vehicle battery charging applications. The dc-dc converter utilizes a T-type bridge structure to process the soft dc-link voltage generated from an Unfolder. The converter is designed to operate efficiently over a wide range of variations in the output and input voltages. A leading-edge aligned modulation technique is used to increase the soft switching range of the primary bridge switching devices. Coupling between two input ports of the dc-dc converter due to the unique modulation technique is discussed and a decoupling control strategy is introduced to achieve the two control objectives of power factor control and output current control. The proposed 18 kW module serves as a scalable building block for a modular extreme fast charging system. Hardware results from an 18 kW module are presented with 96.3% ac-dc and 97.3% dc-dc efficiency for rated operating conditions.","PeriodicalId":151216,"journal":{"name":"2023 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"69 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2023-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2023 IEEE Applied Power Electronics Conference and Exposition (APEC)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/APEC43580.2023.10131542","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
This paper proposes a high-performance Unfolder-based single-stage ac-dc converter for electric vehicle battery charging applications. The dc-dc converter utilizes a T-type bridge structure to process the soft dc-link voltage generated from an Unfolder. The converter is designed to operate efficiently over a wide range of variations in the output and input voltages. A leading-edge aligned modulation technique is used to increase the soft switching range of the primary bridge switching devices. Coupling between two input ports of the dc-dc converter due to the unique modulation technique is discussed and a decoupling control strategy is introduced to achieve the two control objectives of power factor control and output current control. The proposed 18 kW module serves as a scalable building block for a modular extreme fast charging system. Hardware results from an 18 kW module are presented with 96.3% ac-dc and 97.3% dc-dc efficiency for rated operating conditions.