| abstract |
In a core (3) for a stationary machine having a wound core in which the magnetic core inside the wound core is subdivided to improve the core characteristics, two or more types of magnetic materials (11 to 14) having different magnetic permeability are used. The rolled core is formed by laminating a single plate or a plurality of sheets to form a laminated block, and a laminated block having different magnetic permeability is alternately arranged from the inner circumference to constitute a core (3). Further, among the core materials having different magnetic permeability, a core material (14) having a large magnetic permeability is disposed on the inner peripheral side. Further, when the core materials having different magnetic permeability are alternately arranged, the thickness of the core material (11) having the same permeability is gradually changed, and the excessive magnetic flux density distribution in the core is relaxed. Further, the annular core is a block-shaped laminated body in which a plurality of rectangular amorphous material sheets are laminated, and a plurality of layers are laminated, and the plurality of block-shaped laminated bodies in a ring shape are the most A thin plate-shaped non-magnetic insulating material is disposed between the block-shaped laminated body of the n (n is an integer of 2 or more) layer and the block-shaped laminated body of the n+1 layer on the inner peripheral side. |