三相インバータのレグ間キャパシタ電流アンバランスとその抑制法

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: 2018/06/01

タイトル(英語): Capacitor Current Imbalance and Its Suppression Method Between Phase Legs for Three-phase Inverter

著者名: 平尾　高志（首都大学東京），和田　圭二（首都大学東京），清水　敏久（首都大学東京）

著者名(英語): Takashi Hirao (Tokyo Metropolitan University), Keiji Wada (Tokyo Metropolitan University), Toshihisa Shimizu (Tokyo Metropolitan University)

キーワード: 電流アンバランス，DCキャパシタ，共振，寄生インダクタンス，スイッチング周波数　　current imbalance，DC-link capacitor，resonance，stray inductance，switching frequency

要約(英語): This paper proposes a method to suppress the capacitor current imbalance between the phase legs of a three-phase inverter circuit. This circuit consists of half-bridge modules and DC-link capacitors closely connected to each module. It can be designed for low stray inductance between power semiconductor devices and DC-link capacitors in each module. However, in the conventional structure, the stray inductance between the phase legs may lead to an imbalance in the capacitor current due to the DC-side resonance phenomenon under a higher switching frequency condition by using a SiC MOSFET. This paper presents the analyses of the equivalent circuit considering the circuit configuration, which suggests that capacitor current imbalance occurs depending on the stray inductance between phase legs. To suppress the capacitor current imbalance, a delta-type bus bar connecting phase legs is proposed. The experiment results at 300V and 4.6A demonstrate the suppression effectiveness of the proposed method.

本誌: 電気学会論文誌D（産業応用部門誌） Vol.138 No.6 （2018）

本誌掲載ページ: 491-498 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/138/6/138_491/_article/-char/ja/