| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a core with a laminated structure, in which a given radius of the core is set surely, when a plurality of magnetic plates are laminated in a cylindrical shape, and also to provide its manufacturing method. SOLUTION: A core is made up of a plurality of plates M1 to M26 with differing widths A first core part 10a has an almost semicircular cross section, and in this case plates M1 to M26 are laminated in order of increasing width in the same cutting direction. A second core part 10b has an almost semicircular cross section, and plates M1 to M12 are laminated in order of decreasing width in the same direction. Each face with largest width face of the first and second core parts 10a and 10b is fitted to each other to form a laminated core with an almost circular cross section. Both end faces of the plates M1 to M26 in a width direction have burrs B1 and Bs, but these burrs B1 and B2 are not butted to each other when the plates M1 to M26 are laminated, and the Plates M1 to M26 are joined tightly.</p> |
