Development of Low Noise Core for Power Transformer by Utilizing Inertial and Viscous Resistance Force of Oil

カテゴリ: 部門大会

論文No: 293

グループ名: 【B】令和元年電気学会電力・エネルギー部門大会

発行日: 2019/08/23

タイトル(英語): Development of Low Noise Core for Power Transformer by Utilizing Inertial and Viscous Resistance Force of Oil

著者名: 郭 翔(日立製作所),栗田 直幸(日立製作所)

著者名(英語): Xiang Guo|Naoyuki Kurita

キーワード: Transformer|Magnetostriction|Core vibration|Low noise,Transformer,Magnetostriction,Core vibration,Low noise

要約(日本語): Main noise sources of power transformer are core’s stress generated with magnetostriction and magnetic attractive force at overlapped regions. This research developed a lap joint structure of core decreasing the vibration and quantified its effect by prototyping. The maximum reduced amount of noise of 14 dB was achieved comparing with a conventional core under the same vibration force by small volume prototype. The structure consisting of stacked Si-steel panels while shifting has wider internal surface facing the oil at lap joints. It was confirmed that the structure attenuated the vibration effectively due to larger inertial and viscous resistance force of oil.

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