Reducing Transformer Losses with Adjustable Path-Core Type Inductance in 1.4-MHz LLC Resonant Converters
Reducing Transformer Losses with Adjustable Path-Core Type Inductance in 1.4-MHz LLC Resonant Converters
カテゴリ: 論文誌(論文単位)
グループ名: 【D】産業応用部門(英文)
発行日: 2022/09/01
タイトル(英語): Reducing Transformer Losses with Adjustable Path-Core Type Inductance in 1.4-MHz LLC Resonant Converters
著者名: Tengfei Ou (Department of Electrical Engineering, Graduate School of Engineering, Nagoya University), Mostafa Noah (Department of Electrical Engineering, Graduate School of Engineering, Nagoya University), Mamoru Tsuruya (Engineering Department, Power Ass
著者名(英語): Tengfei Ou (Department of Electrical Engineering, Graduate School of Engineering, Nagoya University), Mostafa Noah (Department of Electrical Engineering, Graduate School of Engineering, Nagoya University), Mamoru Tsuruya (Engineering Department, Power Assist Technology (Ltd.)), Seiji Namiki (Engineering Department, Power Assist Technology (Ltd.)), Koichi Morita (Engineering Department, Power Assist Technology (Ltd.)), Jun Imaoka (Department of Electrical Engineering, Graduate School of Engineering, Nagoya University), Masayoshi Yamamoto (Department of Electrical Engineering, Graduate School of Engineering, Nagoya University)
キーワード: transformer losses,magnetic structure,resonant converter,leakage fluxes
要約(英語): Path-core type resonant inductance adjustable (PRIA) transformer usage in high-frequency LLC resonant converters is proposed herein to reduce transformer losses. The proposed magnetic structure is a type of transformer with adjustable resonant inductance combined with a path core for LLC resonant converters. In the proposed transformer, the flux density of the magnetizing inductance can be reduced with a path core. Therefore, fewer core losses are generated when using the proposed transformer. Moreover, the flux of leakage inductance that can be set with the path core has been previously proven by researchers at the Nagoya University laboratory. Consequently, the coil losses, which are one of the largest components of transformer losses, can be reduced effectively by controlling the path of the leakage flux. The proposed PRIA transformer has been reported to improve the efficiency of LLC converters. In this study, a conventional transformer with a magnetic structure is compared with a PRIA transformer through experiments. The core losses were obtained through finite-element simulations, and the coil losses not generated by the magnetic structures were estimated via calculations. The advantage of reducing transformer losses in high-frequency LLC resonant converters with PRIA-structure transformers is presented in this work.
本誌: IEEJ Journal of Industry Applications Vol.11 No.5 (2022)
本誌掲載ページ: 664-673 p
原稿種別: 論文/英語
電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejjia/11/5/11_21012384/_article/-char/ja/
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