SYSTEM AND METHOD FOR REDUCING CURRENT EXITING A ROLL THROUGH ITS BEARINGS USING BALANCED MAGNETIC FLUX VECTORS IN INDUCTION HEATING APPLICATIONS

摘要

A system includes a roll (119, 212, 504) formed from a conductive material, where the roll is configured to rotate about an axis (214). The system also includes at least one induction heating workcoil (202a-202b, 402, 412, 422, 432, 502) configured to generate multiple magnetic fluxes (216a-216b) within the roll. Each induction heating workcoil includes at least two separately wound coils (204, 406a-406b, 416, 426, 436). The multiple magnetic fluxes when spatially summed have a substantially null magnetic flux vector. An induction heating workcoil could represent a balanced induction heating workcoil that is configured to individually generate multiple magnetic fluxes that when spatially summed have the substantially null magnetic flux vector. Multiple induction heating workcoils could also represent unbalanced induction heating workcoils configured to collectively generate multiple magnetic fluxes that when spatially summed have the substantially null magnetic flux vector.