Abstract: An axial air gap type electric motor includes: a stator with stator cores in a ring shape around a rotating shaft and including a laminated iron core that is a prismatic body of metal plate-like members laminated in a radial direction of the rotating shaft, a tubular bobbin with an inner diameter into which the laminated iron core is inserted, and a coil wound on the extension of the outer diameter of the laminated iron core; and a rotor plane-facing the rotating shaft direction end section of the stator with a predetermined air gap interposed therebetween. The laminated iron core includes: a core member with continuously laminated metal plate-like members, the widths of which increase in a rotational direction of the rotating shaft from the center toward a radial direction; and a core member with continuously laminated metal plate-like members, the widths of which are substantially equal.

Abstract: The purpose of the present invention is to efficiently cope with the plate thickness deviation of a laminated iron core in an axial air gap type electric motor. An axial air gap type electric motor comprises: a stator formed by arranging stator cores around a rotating shaft in a ring shape, said stator cores each including a laminated iron core that is a prismatic body formed by laminating metal plate-like members in a radial direction of the rotating shaft, a tubular bobbin that has an inner diameter into which the laminated iron core is inserted, and a coil that is wound on the extension of the outer diameter of the laminated iron core; and at least one rotor plane-facing the rotating shaft direction end section of the stator with a predetermined air gap interposed therebetween.

Abstract: A method of preheating iron scraps in steel-making by the electric arc furnace, by utilizing high-temperature exhaust gas to be discharged from the electric arc furnace. This method shortens, to a large extent, the time required for melting iron scraps and economizes in energy.