2012•Unpublished venueRequires access

Measurement and analysis of in-plane eddy current in lamination steel using a new tester

Kazuo Shima, Takeo Murai, Tadashi Fukami, Yoko Furukawa, Akiyoshi Komura

Abstract

In stator end regions of turbogenerators, the in-plane eddy current arises in the lamination steel. In this paper, a simple tester to measure the in-plane eddy current losses in lamination steel is newly designed and built. A measurement method to separate the in-plane losses from the total core losses in the tester is presented. The in-plane losses are measured and computed by finite element analysis. The computed losses agreed well with the measured ones. The accuracy of the analysis has been confirmed. The eddy-current phenomena in the tester are examined by the analysis. The computed results show that the in-plane eddy current has nearly resistance-limited characteristics. The eddy current generates the looped flux inside a steel sheet.

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Available abstract

Key concepts: Eddy current, Lamination, Stator, Finite element method, Current (fluid), Plane (geometry), Skin effect, Materials science