Patent ID: 8373101
Filing Date: 2013-02-12
Classification: H05B

Abstract:
1. An induction heating device, comprising: a cylindrical heating roller that performs electromagnetic induction heating; a first excitation coil that is provided inside of the heating roller, that is wound so as to have an axis extending in the same direction as a direction of a shaft of the heating roller, and that is connected to a first power source, the first power source comprising a commercial power source; and a second excitation coil that is provided inside of the heating roller, that is wound so as to have an axis in a direction substantially orthogonal to the shaft of the heating roller, and that is connected to a second power source, the second power source comprising a rechargeable auxiliary power source, wherein the second excitation coil has parallel portions that linearly extend in parallel to an axial direction of the first excitation coil and circular-arc bridge areas that extend in a direction substantially orthogonal to an axial direction of the first excitation coil so as to couple ends of the two parallel portions; the two bridge areas are provided along a circumference of and overlapping the first excitation coil such that an open side of the circular arc of the first bridge area faces in a first direction and an open side of the circular arc of the second bridge area faces in a second direction opposite to the first direction; and a control circuit that recharges the second power source by means of the second excitation coil when electric power is supplied from the first power source to the first excitation coil and electric power is not supplied from the second power source to the second excitation coil.