Manufacturing methods and laminated core that has been produced by this electromagnetic steel sheet laminated core for magnetic loss reduction and strength improvement

摘要

present invention relates to a manufacturing method and a laminated core produced by this electromagnetic steel plates laminated core for the magnetic loss reduction and strength improvement. One embodiment of the present invention includes the steps of obtaining a laminated body by laminating electromagnetic steel sheets, comprises the steps of welding the outer peripheral surface of the laminate, the electrical resistivity is 6.5 10 during the welding ^-7 is a m or more, relative permeability is less than 1.02, the manufacturing method of the electromagnetic steel plates laminated core which comprises using a welding wire having a lower melting point than that of the electrical steel sheet as the welding material and to provide a laminated core manufactured by this