Patent ID: 8943677
Filing Date: 2015-02-03
Classification: C21D,C22C,H01F,H02K,Y10T

Abstract:
1. A method for joining core laminations to form a soft-magnetic laminated core, comprising: producing sheets of a soft-magnetic, crystalline CoFe material, each sheet having a top side and an underside; applying a coating that is wettable with epoxy resin to the top sides and undersides of each sheet; separating said sheets into core laminations having a wettable coating on the top sides and undersides and having less wettable contour surfaces; stacking the core laminations to form a core lamination stack, comprising stacking each core lamination on top of another core lamination without warping and in a plane parallel manner, and wherein said introducing of said solvent-free, low-viscosity adhesive between the core laminations comprises filling an epoxy-based solvent-free adhesive of low viscosity into the interstices between the core laminations of the core lamination stack from an end face of the core lamination stack by means of capillary action; and joining the core lamination stack by adhesive force to produce a soft-magnetic laminated core by introducing a solvent-free, low-viscosity adhesive between the core laminations in the core lamination stack, and curing the adhesive to produce electrically insulating intermediate layers between sheets of soft-magnetic material.