レベルシフトPWM制御を適用した高電圧受電絶縁型AC-DCコンバータ

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: 2021/07/01

タイトル(英語): Isolated Medium-Voltage AC-DC Converter Using Level-Shifted PWM Control

著者名: 武道　宏平（名古屋工業大学），竹下　隆晴（名古屋工業大学）

著者名(英語): Kohei Budo (Nagoya Institute of Technology), Takaharu Takeshita (Nagoya Institute of Technology)

キーワード: 絶縁型AC-DCコンバータ，モジュラーマトリックスコンバータ，レベルシフトPWM制御，高周波トランス　　isolated AC-DC converter，modular matrix converter，level-shifted PWM control，high-frequency transformer

要約(英語): The authors have proposed an isolated medium-voltage AC-DC converter using a Modular Matrix Converter (MMxC). The proposed circuit directly converts medium three-phase AC voltage to DC voltage because the MMxC has a high breakdown voltage capability. Therefore, the proposed circuit can be downsized because it does not need a commercial transformer to convert the medium voltage to the low voltage. This paper presents a level-shifted PWM control in the proposed circuit's MMxC to generate the multi-level output voltage. When the MMxC output voltage frequency is equal to the switching frequency, the level-shifted PWM control is more suitable than phase-shifted PWM control for generating the MMxC multi-level output voltage. Level-shifted PWM control can reduce the source current harmonics and the MMxC switching loss. The total-power-factor of the high-frequency transformer can be improved by level-shifted PWM control. The theoretical waveforms of applying level-shifted PWM control to the proposed circuit can be experimentally obtained using a 6-kW small power system. In addition, this control method's effectiveness is verified, compared with the conventional control method which generates the three-level PWM waveform in the MMxC.

本誌: 電気学会論文誌D（産業応用部門誌） Vol.141 No.7 （2021）

本誌掲載ページ: 561-573 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/141/7/141_561/_article/-char/ja/