Method of reducing noise in magnetic core and magnetic core

Details Method of reducing noise in magnetic core and magnetic core Method of reducing noise in magnetic core and magnetic core

H - Electricity

01

F

H01F 27/33 (2006.01) H01F 3/04 (2006.01) H01F 3/14 (2006.01) H01F 27/26 (2006.01) H01F 27/34 (2006.01)

Patent

CA 2052295

ABSTRACT OF THE DISCLOSURE This invention relates to a method of reducing noise of a magnetic core which is annular in shape, has a rectangular section, has an outer circumferential surface and an inner circumferential surface, and has a first side surface (upper surface) for connecting one edge of these outer and inner circumferential surfaces and a second side surface (lower surface) for connecting the other edge of the outer and inner circumferential surfaces, comprising partially forming a slit groove entering toward the opposite surface on one of the inner circumferential surface, the first side surface and the second side surface is partially; as well as the following three kinds of low noise type magnetic cores; (I) a magnetic core produced by the aforesaid method; (II) a magnetic core in which two or more magnetic cores are layered to have a positional relation to cause each of the magnetic cores to vibrate at the same phases; and (III) a magnetic core in which an annular magnetic core is stored in an annular storing container having a container main body with a cylindrical outer circumferential wall and a cylindrical inner circumferential wall concentrically arranged therewith having a smaller diameter than that of the outer circumferential wall which are connected through a bottom plate, and having an annular lid covering the opening of a container main body, the inner surface of said storing container is provided with some supporting projections for fixing the magnetic core, and a spacing is formed between the inner surface of the storing container and the magnetic core by the supporting projections.

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