Y-Δ結線による三相絶縁型双方向DC/DCコンバータの軽負荷時の効率改善

カテゴリ: 論文誌(論文単位)

グループ名: 【D】産業応用部門

発行日: 2013/06/01

タイトル(英語): Improvement of Light-Load Efficiency of Three-Phase Dual Active Bridge Isolated Bidirectional DC/DC Converter by Employing Y-Δ Transformation

著者名: 周藤　龍（首都大学東京大学院理工学研究科／新電元工業（株）），清水　敏久（首都大学東京大学院理工学研究科）

著者名(英語): Ryu Sudo (Tokyo Metropolitan University/Shindengen Electric Mfg. Co., Ltd.), Toshihisa Shimizu (Tokyo Metropolitan University)

キーワード: 絶縁型双方向コンバータ，ソフトスイッチング範囲，トランスkVA，リプル電流，高調波電流　　isolated bidirectional dc/dc converter，soft-switching range，transformer kVA，ripple current，current harmonics

要約(英語): In order to improve light-load efficiency, a Y-Δ connected three-phase dual active bridge (DAB) galvanically isolated bidirectional dc/dc converter topology is proposed in this paper. All the primary and secondary switches of this converter are operated in a soft-switched manner over the entire operating range, when the secondary to primary voltage gain is kept within approximately 100 ± 14%. In comparison with the conventional Y-Y connected three-phase DAB converter, the stresses of power devices such as transformers, inductors, filters' capacitors, and switches are almost at the same level as that of the conventional converter, and the power devices can be kept at the same size. With space vector analysis of voltage harmonics and inductor current harmonics, it is clear that the 5th and 7th harmonics' reactive current flowing through the inductor is greater than that of the Y-Y connected DAB converter at light-load condition, which makes switches easy to be operated in a soft-switched manner when they turn on. A 5.5kW prototype has been built to verify all the theoretical considerations.

本誌: 電気学会論文誌D（産業応用部門誌） Vol.133 No.6 （2013）

本誌掲載ページ: 595-608 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejias/133/6/133_595/_article/-char/ja/