Patent ID: 11875940
Assignee: JFE STEEL CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B | IPC B  H

Claim 14:
15. The lifting-magnet attachment magnetic pole unit according to claim 13, wherein the fixed magnetic pole has dimensions satisfying Inequality (2):

S×B<L1×t1×BS  Inequality (2)

where
S is a cross-sectional area (mm2) of an inner pole of the lifting magnet;
B is a mean magnetic flux density (T) inside the inner pole of the lifting magnet;
L1 is a total perimeter (mm) of the fixed magnetic pole in a region where the fixed magnetic pole is in contact with a lifted steel material;
t1 is a maximum sum (mm) of plate thicknesses of steel materials lifted by the fixed magnetic pole; and
BS is a saturation magnetic flux density (T) in the lifted steel materials.