Examination of Eddy Current between Steel Sheets without Insulation and Criterion for Determining the Necessity of Insulation

DOI Web Site Web Site 9 References
  • Akagi Akira
    Department of Electrical and Electronic Engineering, Faculty of Engineering, Okayama University
  • Takahashi Norio
    Department of Electrical and Electronic Engineering, Faculty of Engineering, Okayama University
  • Nakano Masanori
    Department of Electrical and Electronic Engineering, Faculty of Engineering, Okayama University
  • Doi Yuhito
    Magnetic Materials R & D Center, Shin-Etsu Chemical Co., Ltd.
  • Miyagi Daisuke
    Department of Electronic Engineering, Tohoku University

Bibliographic Information

Other Title
  • 絶縁皮膜の無い積層鋼板間を流れる渦電流及び絶縁必要性の判定指標の検討
  • ゼツエン ヒマク ノ ナイ セキソウ コウバン カン オ ナガレル ウズデンリュウ オヨビ ゼツエン ヒツヨウセイ ノ ハンテイ シヒョウ ノ ケントウ

Search this article

Abstract

In the laminated core of transformers, motors, etc., each electrical steel sheet is usually insulated in order to reduce the eddy current loss. It has been reported that the insulation is not necessary in such a laminated core in some conditions. However, few studies have been performed in quantitative and systematic examination of the relationship between the insulation and eddy current. In this study, the eddy current losses of a core made of SPCC (colded rolled steel sheets) of different widths with and without insulation under various conditions are analyzed by using the finite element method (FEM) and considering the contact resistance. The equivalent circuit of a laminated core without insulation is presented, that can be used for determining the necessity of insulation. It is shown that the increase in the eddy current is affected by the ratio of the resistance of steel to the contact resistance. An experimental investigation is also carried out.

Journal

References(9)*help

See more

Related Projects

See more

Keywords

Details 詳細情報について

Report a problem

Back to top