{"id":530,"date":"2014-11-22T07:56:48","date_gmt":"2014-11-21T22:56:48","guid":{"rendered":"http:\/\/isy2.wordpress.com\/?p=530"},"modified":"2014-11-22T07:56:48","modified_gmt":"2014-11-21T22:56:48","slug":"full-papera-power-efficiency-improvement-technique-for-a-bidirectional-dual-active-bridge-dc-dc-converter-at-light-load","status":"publish","type":"post","link":"https:\/\/pemsic.eee.nagasaki-u.ac.jp\/?p=530","title":{"rendered":"Full Paper:A Power Efficiency Improvement Technique for a Bidirectional Dual Active Bridge DC\u2013DC Converter at Light Load"},"content":{"rendered":"<p><a href=\"http:\/\/ieeexplore.ieee.org\/xpl\/articleDetails.jsp?tp=&amp;arnumber=6823708&amp;queryText%3Dtakasaki+ishizuka+hirose\" target=\"_blank\">A Power Efficiency Improvement Technique for a Bidirectional Dual Active Bridge DC\u2013DC Converter at Light Load<\/a><\/p>\n<p><span style=\"text-decoration: underline;\"><span style=\"color: #0066cc;\"><span class=\"snippet\">Toshiro Hirose<\/span><\/span><\/span>; <span class=\"snippet\"><span style=\"text-decoration: underline;\"><span style=\"color: #0066cc;\">Mika Takasaki<\/span><\/span><\/span>;\u00a0<a class=\" prefNameLink\" title=\"\" href=\"http:\/\/ieeexplore.ieee.org\/search\/searchresult.jsp?searchWithin=p_Authors:.QT.Ishizuka, Y..QT.&amp;newsearch=true\"> Yoichi <span class=\"snippet\">Ishizuka<\/span><\/a>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<a href=\"http:\/\/ieeexplore.ieee.org\/xpl\/RecentIssue.jsp?punumber=28\"><br \/>\nIndustry Applications, IEEE Transactions on <\/a><br \/>\nVolume: 50 ,<a href=\"http:\/\/ieeexplore.ieee.org\/xpl\/tocresult.jsp?isnumber=6949174\"> Issue: 6 <\/a><br \/>\nDOI: <a href=\"http:\/\/dx.doi.org\/10.1109\/TIA.2014.2327147\" target=\"blank\"> 10.1109\/TIA.2014.2327147<\/a><br \/>\nPublication Year: 2014 , Page(s): 4047 &#8211; 4055<\/p>\n<p>Bidirectional dc\u2013dc converters, which make possible the bidirectional transmission of power, have become indispensable in recent years due to the diversification of the power supply network, including the use of batteries. Of these, the dual active bridge (DAB) dc\u2013dc converter features a simple mechanism and symmetric circuit architecture, making possible the equal transmission of power in both directions. Because of these advantageous characteristics, DAB dc\u2013dc converters are in wide use. However, this circuit has the intrinsic problems that, during light-load conditions, switching surges occur and power efficiency decreases. This paper proposes digitally controlled operation as a new method to resolve these problems and reports on an experiment that was carried out using a 1-kW system. In addition, for both buck and boost modes, output power characteristic equations were derived through application of the extended state-space averaging method, and a loss-included circuit analysis was carried out for the circuit used in the experiment. It was thereby demonstrated that circuit loss was smaller for the proposed operation than that for conventional operation. In the loss-included circuit analysis, for both proposed and conventional operations, equivalent circuits that approximated circuit loss as a single resistance were used. As a result, it was confirmed that, with the operation proposed in this paper, without the use of a snubber circuit, switching surges could be reduced significantly and also that, during light load, there was a power efficiency improvement of up to 16%. In addition, a loss-included circuit analysis with a single equivalent resistance has been done. The resistance value is assigned with the averaged circuit total resistance. By the analysis, a relation between phase difference and output power is obtained. The results were confirmed with the experiment.<\/p>\n<p><a href=\"http:\/\/ieeexplore.ieee.org\/xpl\/articleDetails.jsp?tp=&amp;arnumber=6823708&amp;queryText%3Dtakasaki+ishizuka+hirose\" target=\"_blank\">\u00a0<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A Power Efficiency Improvement Technique&#8230; <a class=\"more-link\" href=\"https:\/\/pemsic.eee.nagasaki-u.ac.jp\/?p=530\">Continue Reading &rarr;<\/a><\/p>\n","protected":false},"author":1,"featured_media":1130,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[4],"tags":[16,19,29,31,33,34],"class_list":["post-530","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-published","tag-dab","tag-dual-active-bridge","tag-smps","tag-toshiro-hirose","tag-yoichi-ishizuka","tag-34"],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/pemsic.eee.nagasaki-u.ac.jp\/wp-content\/uploads\/2014\/11\/DAB1-e1447809749918.png?fit=640%2C853&ssl=1","jetpack_sharing_enabled":false,"jetpack_shortlink":"https:\/\/wp.me\/p6WRmG-8y","jetpack-related-posts":[{"id":2084,"url":"https:\/\/pemsic.eee.nagasaki-u.ac.jp\/?p=2084","url_meta":{"origin":530,"position":0},"title":"Presentation:   &#8220;Adaptive Control Technique for High Power Efficiency Dual Active Bridge DC-DC Converter with Wide Load Range&#8221;, Sept. 23-27, 2018@2018 IEEE Energy Conversion Congress and Exposition, Portland, OR","author":"","date":"09\/01\/2018","format":false,"excerpt":"Thank you for dropping by our board! \u00a0 2018 I\u2026","rel":"","context":"Presentations","block_context":{"text":"Presentations","link":"https:\/\/pemsic.eee.nagasaki-u.ac.jp\/?cat=5"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/pemsic.eee.nagasaki-u.ac.jp\/wp-content\/uploads\/2018\/07\/DSC_1878-300x225.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":201,"url":"https:\/\/pemsic.eee.nagasaki-u.ac.jp\/?p=201","url_meta":{"origin":530,"position":1},"title":"\u8b1b\u6f14\u60c5\u5831\uff1a9\u670815-19\u65e5\u3000\u56fd\u969b\u4f1a\u8b70ECCE 2013 \u9ad9\u5d5c","author":"","date":"09\/10\/2013","format":false,"excerpt":"http:\/\/www.ecce2013.org\/ Wednesday, September 18 1\u2026","rel":"","context":"Presentations","block_context":{"text":"Presentations","link":"https:\/\/pemsic.eee.nagasaki-u.ac.jp\/?cat=5"},"img":{"alt_text":"SONY DSC","src":"https:\/\/isy2.files.wordpress.com\/2013\/09\/dsc08620-e1383437478594.jpg?w=350&h=200&crop=1","width":350,"height":200},"classes":[]},{"id":893,"url":"https:\/\/pemsic.eee.nagasaki-u.ac.jp\/?p=893","url_meta":{"origin":530,"position":2},"title":"Full Paper: Static Characteristic Analysis of Proposed Bi-Directional Dual Active Bridge DC-DC Converter","author":"","date":"09\/01\/2015","format":false,"excerpt":"*This jounal is\u00a0Open Access Journal. 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