ROTATING MAGNET HEAT INDUCTION
FIG23 is a chart depicting rotor speed and strip temperature of the rotor and metal strip of FIG22 under a first condition according to certain aspects of the present disclosure  FIG24 is a chart depicting rotor speed and strip temperature of the rotor and metal strip of FIG22 under a second condition according to certain aspects of the present disclosure
FIG23 is a chart depicting rotor speed 2309 and strip temperature 2301 of the rotor 2208 and metal strip 2202 of FIG22 under a first condition according to certain aspects of the present disclosure. Line 2309 depicts non-dimensionalized rotor speed for each of the eleven sub-rotors 2209 of FIG22. For convenience, the chart of FIG23 is aligned vertically with the sub-rotors 2209 of FIG22. Dashed lines 2302 denote the edges of the metal strip 2202. Line 2301 depicts non-dimensionalized strip temperature across the width of the metal strip 2202 at or immediately after passing the rotor 2208. The lines 2309, 2301 are not necessarily drawn to scale, but shown as exaggerated for demonstrative purposes. Under the second condition, each of the sub-rotors 2209 is driven at the same speed except for the penultimate sub-rotors 2209 adjacent the ends of the rotor 2208. The penultimate sub-rotors 2209 are shown as being driven at speeds greater than the remaining sub-rotors 2209. This condition generates similar moving magnetic fields to a single full-length rotor except near or slightly inwards of the edges of the metal strip 2202, where the amount of heating in increased. The strip temperature 2401 resulting from such moving magnetic fields shows a profile that is more uniform across the width of the metal strip 2202 than the strip temperature 2301 of the first condition depicted in FIG23. Thus, by adjusting the speed of particular sub-rotors 2209 in a rotor 2208 having sub-rotors 2209, temperature uniformity across the width of the metal strip 2202 can be improved.  FIG24 is a chart depicting rotor speed 2409 and strip temperature 2401 of the rotor 2208 and metal strip 2202 of FIG22 under a second condition according to certain aspects of the present disclosure. Line 2409 depicts non-dimensionalized rotor speed for each of the eleven sub-rotors 2209 of FIG22. For convenience, the chart of FIG24 is aligned vertically with the sub-rotors 2209 of FIG22. Dashed lines 2402 denote the edges of the metal strip 2202. Line 2401 depicts non-dimensionalized strip temperature across the width of the metal strip 2202 at or immediately after passing the rotor 2208. The lines 2409, 2401 are not necessarily drawn to scale, but shown as exaggerated for demonstrative purposes.
flowchart
2409
chart depicting rotor speed present disclosure. Line
2209
sub-rotors
2202
metal strip
2401
strip temperature
2302
Dashed lines
2309
chart depicting rotor speed present disclosure. Line
2208
rotor
2224
in direction
2402
Dashed lines
2301
strip temperature
['1. A heating system, comprising: a magnetic heating apparatus (500; 600) for heating a metal article (502; 602) moving in a downstream direction (524; 224), wherein the magnetic heating apparatus (500; 600) includes a plurality of heaters for inducing a tailored temperature profile in the metal article (502; 602), the plurality of heaters comprising at least a first magnetic rotor (530, 532; 630, 632) and a second magnetic rotor (546, 548; 646, 648), each of the first magnetic rotor (530, 532; 630, 632) and the second magnetic rotor (546, 548; 646, 648) containing at least one magnetic source and being rotatable about an axis of rotation that is perpendicular to the downstream direction (524; 224) and parallel to a lateral width of the metal article (502; 602) to generate changing magnetic fields through the metal article (502; 602), characterized in that  in order to facilitate inducing the tailored temperature profile in the metal article (502; 602), the first magnetic rotor (530, 532; 630, 632) is laterally positionable with respect to the second magnetic rotor (546, 548; 646, 648) to be laterally offset from a centerline of the metal article (502; 602) by an offset distance.']