間欠運転による双方向絶縁形DC-DCコンバータの低出力領域の変換効率向上

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: 2016/07/01

タイトル(英語): Enhancement of Power Conversion Efficiency in a Low-Power Range of a Bidirectional Isolated DC-DC Converter by Intermittent Operation

著者名: 久持　裕史（東京工業大学 工学院 電気電子系），赤木　泰文（東京工業大学 工学院 電気電子系），木ノ内　伸一（三菱電機（株）自動車機器開発センター），宮崎　裕二（三菱電機（株）パワーデバイス製作所）

著者名(英語): Hirofumi Hisamochi (Department of Electrical and Electronic Engineering, Tokyo Institute of Technology), Hirofumi Akagi (Department of Electrical and Electronic Engineering, Tokyo Institute of Technology), Shin-ichi Kinouchi (Automotive Electronics Development Center, Mitsubishi Electric Corporation), Yuji Miyazaki (Power Device Works, Mitsubishi Electric Corporation)

キーワード: 双方向絶縁形 DAB DC-DCコンバータ，間欠運転，SiC-MOSFETモジュール，同期整流　　bidirectional isolated DAB dc-dc converters，intermittent operation，SiC-MOSFET modules，synchronous rectification

要約(英語): This paper describes a 750-Vdc, 100-kW, 20-kHz bidirectional isolated dual-active-bridge (DAB) dc-dc converter using SiC-MOSFET modules without free-wheeling diodes, focusing on the output voltage ripple and power conversion efficiency. Intermittent operation brings higher conversion efficiencies in a low-power range to the dc-dc converter than does continuous operation because it makes a significant contribution to reducing switching (snubber) and iron losses. Experimental results reveal that the efficiency at 10kW (10% of the rated power) is 95.1% in continuous operation, whereas it is improved to 98.2% in intermittent operation. The combination of intermittent operation with continuous operation makes the efficiencies in a power range from 3 to 100kW higher than 98%, excluding power losses produced by the control and gate-drive circuits. However, the intermittent operation may bring additional voltage ripples to the dc output terminals. Theoretical analysis confirms that the voltage ripples in a power range from 1 to 18kW are lower than 7V in peak-to-peak, which is only 0.9% of 750Vdc. Theoretical results are confirmed by comparison to simulated and experimental ones.

本誌: 電気学会論文誌D（産業応用部門誌） Vol.136 No.7 （2016） 特集：家電・民生技術

本誌掲載ページ: 501-508 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/136/7/136_501/_article/-char/ja/