| 主权项 |
1. An induction heating apparatus that heats a plate-like heating object having electrical conductivity and a thickness direction, using induction current generated inside the heating object, the apparatus comprising:
a coil that is wound about a core and generates magnetic flux when alternating current is supplied thereto from a power source; a core that is formed of a magnetic material capable of propagating the magnetic flux, and has one or more pairs of magnetic poles, with the magnetic poles in a pair having mutually opposite magnetic polarities, the one or more pairs of magnetic poles being arranged, on a pair basis, such that the magnetic poles in a pair sandwich therebetween both thickness-direction surfaces of the heating object, and the magnetic poles in a pair are located in a width-direction center portion of the respective both surfaces; a first magnetic flux control element that shuts off or suppresses propagation of the magnetic flux in at least one of both surfaces of the heating object, the magnetic flux being generated from the magnetic poles, and flowing along the at least one surface toward both width-direction ends of the surface, while departing from the center portion; and a second magnetic flux control element that is arranged near at least one end portion of the both width-direction ends of the heating object, and reduces an amount of the magnetic flux concentrated on the end portion. |
