Isolated DC-DC Converter utilizing GaN power device for Automotive Application

2019 IEEE Applied Power Electronics Conference and Exposition (APEC) Pub Date : 2019-03-17 DOI:10.1109/APEC.2019.8722097

H. Matsumori, T. Kosaka, Kisho Sekido, Kitae Kim, T. Egawa, N. Matsui

{"title":"Isolated DC-DC Converter utilizing GaN power device for Automotive Application","authors":"H. Matsumori, T. Kosaka, Kisho Sekido, Kitae Kim, T. Egawa, N. Matsui","doi":"10.1109/APEC.2019.8722097","DOIUrl":null,"url":null,"abstract":"This paper presents an isolated step-sown DC-DC converter using GaN power device for automotive applications. The works for a power supply from a high voltage main battery with 200V to low voltage auxiliary battery with 13.6V in hybrid electric vehicle. A LLC converter is known as isolated DC-DC converter with high-efficiency. However, when input and/or output voltage considerably fluctuates, efficiency of a LLC resonant converter becomes worse. In order to solve this problem, a DC-DC boost-up converter to mitigate efficiency deterioration for the input and/or output voltage fluctuation is added to a LLC resonant converter. Generally speaking, an additional circuit, the boost-up chopper in this case, also deteriorates the total system efficiency. To avoid the efficiency degradation, discontinuous current mode control and GaN power devices are applied to the boost-up chopper. The DC-DC boost-up converter experimentally achieves 99.03% of conversion efficiency at nominal output so that it has no effect on the total system efficiency. Even though adding a DC-DC boost-up chopper to the LLC resonant converter, a power density expected to 10 W/cc.","PeriodicalId":142409,"journal":{"name":"2019 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2019-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"16","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2019 IEEE Applied Power Electronics Conference and Exposition (APEC)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/APEC.2019.8722097","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 16

Abstract

This paper presents an isolated step-sown DC-DC converter using GaN power device for automotive applications. The works for a power supply from a high voltage main battery with 200V to low voltage auxiliary battery with 13.6V in hybrid electric vehicle. A LLC converter is known as isolated DC-DC converter with high-efficiency. However, when input and/or output voltage considerably fluctuates, efficiency of a LLC resonant converter becomes worse. In order to solve this problem, a DC-DC boost-up converter to mitigate efficiency deterioration for the input and/or output voltage fluctuation is added to a LLC resonant converter. Generally speaking, an additional circuit, the boost-up chopper in this case, also deteriorates the total system efficiency. To avoid the efficiency degradation, discontinuous current mode control and GaN power devices are applied to the boost-up chopper. The DC-DC boost-up converter experimentally achieves 99.03% of conversion efficiency at nominal output so that it has no effect on the total system efficiency. Even though adding a DC-DC boost-up chopper to the LLC resonant converter, a power density expected to 10 W/cc.

查看原文本刊更多论文

基于GaN电源器件的汽车隔离DC-DC变换器

本文提出了一种基于GaN电源器件的汽车用隔离式步进式DC-DC变换器。本工程为混合动力汽车提供由200V高压主电池至13.6V低压辅助电池的电源。LLC变换器是一种高效的隔离型DC-DC变换器。然而，当输入和/或输出电压波动较大时，LLC谐振变换器的效率会变差。为了解决这个问题，在LLC谐振变换器中增加了一个DC-DC升压变换器，以减轻输入和/或输出电压波动导致的效率下降。一般来说，一个额外的电路，在这种情况下的升压斩波器，也会降低系统的总效率。为了避免效率下降，在升压斩波器中采用了断续电流模式控制和氮化镓功率器件。实验结果表明，DC-DC升压变换器在标称输出下达到99.03%的转换效率，对系统总效率没有影响。即使在LLC谐振变换器中增加DC-DC升压斩波器，功率密度预计为10 W/cc。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

2019 IEEE Applied Power Electronics Conference and Exposition (APEC)

自引率

0.00%

发文量