US 12,237,103 B2
Electrical steel lamination stacks with magnetic insulator coating for electrical apparatus cores
Leyi Zhu, Novi, MI (US); Franco Leonardi, Dearborn Heights, MI (US); and Michael W. Degner, Novi, MI (US)
Assigned to FORD GLOBAL TECHNOLOGIES, LLC, Dearborn, MI (US)
Filed by FORD GLOBAL TECHNOLOGIES, LLC, Dearborn, MI (US)
Filed on Jan. 24, 2022, as Appl. No. 17/583,080.
Prior Publication US 2023/0238163 A1, Jul. 27, 2023
Int. Cl. H02K 1/02 (2006.01); H01F 1/34 (2006.01)
CPC H01F 1/344 (2013.01) [H02K 1/02 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A core for an electrical apparatus comprising:
a plurality of electrical steel sheets arranged in a stack to form a laminated stack; and
a magnetic insulator coating applied to both sides of the electrical steel sheets, wherein a relative magnetic permeability of the coating is between μr=500 to 20,000, wherein
the magnetic insulator coating allows magnetic flux to pass in a normal direction to a plane of the laminated stack to increase saturation flux density of the laminated stack.