変圧器鉄心接合部での異常ラップによる騒音増加
変圧器鉄心接合部での異常ラップによる騒音増加
カテゴリ: 論文誌(論文単位)
グループ名: 【A】基礎・材料・共通部門
発行日: 2012/02/01
タイトル(英語): Noise Increase by Abnormal Joints in Transformer Cores
著者名: 溝上 雅人(新日本製鐵(株) 技術開発本部),黒崎 洋介(新日本製鐵(株) 技術開発本部)
著者名(英語): Masato Mizokami (Technical Development Bureau, Nippon Steel Corporation), Yousuke Kurosaki (Technical Development Bureau, Nippon Steel Corporation)
キーワード: 変圧器鉄心,騒音,鉄心接合部,電磁鋼板,磁歪 transformer core,acoustic noise,core joint,electrical steel,magnetostriction
要約(英語): In order to study the acoustic noise generated by transformer cores, the authors have made many 3-phase model transformers, and have measured the noise levels. A unique behavior was found in one result of the noise measurements. The clamping pressures of 0.15MPa and 0.30MPa were applied on the model transformers. In the case of 0.15MPa, the noise levels at the flux densities of 1.5T and 1.6T were unnaturally high in comparison with 0.30MPa. In addition, the harmonic components in high frequency range were higher in the noise spectra at those flux densities. Concerning about the cause of the noise increase, it was assumed that the irregular overlap made in the core joint by accident formed the gap between the core sheets, so that the impact at the end of the sheet was caused by the vibration generated by magnetic attractive force, consequently, impulse sound was generated. For more detailed study, the model core for the investigation on core joints was built. The irregular overlap was intentionally made in the joint, and the waveform of sound pressure was measured. The impulse sound appeared on the measured waveform.
本誌: 電気学会論文誌A(基礎・材料・共通部門誌) Vol.132 No.2 (2012) 特集:電気電子絶縁材料システムシンポジウム
本誌掲載ページ: 192-197 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/ieejfms/132/2/132_2_192/_article/-char/ja/
受取状況を読み込めませんでした
