To provide a method, by which two kinds of magnetic steel plates with different permeabilities are used as a transformer and a reactor and any manufacture efficiency is not hurt while preventing increase of noise of an iron core when manufacturing the iron core which is laminated so that the steel plates with the same permeability may form a closed magnetic circuit, respectively.
In an iron core junction laminated by using a low permeability steel plate, the iron core is arranged so that gap positions of adjacent steel plates in the product thickness direction may be shifted every one steel plate. In an iron core junction laminated by using a high permeability steel plate, the iron core is arranged so that gap positions of adjacent steel plates in the product thickness direction may be shifted every two steel plates.
Takashi Ishida
Tetsuji Koga
Hiroshi Kamematsu
Nagasaka Tomoyasu
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