Grain-oriented electrical steel sheet for low-noise transformer
AssigneeNippon Steel Corporation
InventorsHisashi Mogi, Akira Sakaida, Masahiro Fujikura, Masato Mizokami
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Abstract
The present invention provides a grain-oriented electrical steel sheet, for a low noise transformer, capable of reducing higher harmonics which are highly audible and lowering noise effectively, and relates to a grain-oriented electrical steel sheet for a low noise transformer, characterized by imposing a film tension of 0.5 to 6.0 MPa on the surface by coating or a method corresponding thereto, without forming a glass film on the grain-oriented electrical steel sheet or, if a glass film is formed, after removing the glass film by an arbitrary method.
Claims5
A grain-oriented electrical steel sheet, for a low-noise transformer, having a film that imposes a tension of 0.5 MPa to 4.0 MPa on the steel sheet.
A method for producing a grain-oriented electrical steel sheet, for a low noise transformer, characterized by imposing a film tension of 0.5 MPa to 4.0 MPa on the surface by coating or a method corresponding thereto, without forming a glass film on the grain-oriented electrical steel sheet or, if a glass film is formed, after removing the glass film by an arbitrary method.
Dependencies are inferred from the claim text.