Development of Insulation System to Prevent Local Carbonization inside Stator Core of a Product Inverter-fed Motor

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: 2021/04/01

タイトル(英語): Development of Insulation System to Prevent Local Carbonization inside Stator Core of a Product Inverter-fed Motor

著者名: Yuichiro Yoshitake (R and D Group, Hitachi, Ltd.), Hiroaki Kojima (R and D Group, Hitachi, Ltd.), Yuki Kasai (Hitachi Industrial Products, Ltd.), Shoichi Maruyama (Hitachi Industrial Products, Ltd.), Hiroki Kojima (Nagoya University), Naoki Hayakawa (Nago

著者名(英語): Yuichiro Yoshitake (R and D Group, Hitachi, Ltd.), Hiroaki Kojima (R and D Group, Hitachi, Ltd.), Yuki Kasai (Hitachi Industrial Products, Ltd.), Shoichi Maruyama (Hitachi Industrial Products, Ltd.), Hiroki Kojima (Nagoya University), Naoki Hayakawa (Nago

キーワード: insulation，burning，rotating machine，inverter surge，carbonization，threshold

要約(英語): A new phenomenon, called “local carbonization” inside a stator core was detected as a unique precursor to fragility of the insulation sheets of inverter-fed motors, and the conditions for generation of this carbonization were investigated. A separated stator of a product inverter-fed motor was manufactured, and an evaluation system for simulating a steep surge voltage was constructed. Electrically and mechanically, the results of a parameter survey of insulation system were used to compare the constructed separated stator and element model, and the comparison revealed a correlation between carbonization of the product separated stator and element model. From the consideration of carbonization mechanism, leakage current was revealed to be the dominant design factor. Through quantifying their threshold of carbonization occurrence, insulation system to prevent the carbonization in steeper inverter surge was developed by parameter survey using element model and validation test by separated stator.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.141 No.4 （2021） 特集：2020年基礎・材料・共通部門大会

本誌掲載ページ: 260-268 p

原稿種別: 論文／英語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/141/4/141_260/_article/-char/ja/