Abstract: A coil cooling structure comprises a coil which includes a strip-shaped conductor wound around a specific axis a plurality of times; an alumina layer which is formed on an end surface of the coil in the direction of the specific axis through thermal spraying of alumina and whose surface is flattened; a cooling plate which is mainly formed of alumina and has a flow passage for a cooling medium; and an adhesive which bonds the alumina layer and the cooling plate and which elastically deforms depending on a difference in thermal expansion between the alumina layer and the cooling plate.

Abstract: An electromagnetic coil includes a conductor winding 12a formed by winding a conductor 12b a plurality of times about a predetermined axis, and a ceramic layer 12c formed through thermal spraying on an axial end surface of the conductor winding 12a, and having a flattened surface. A maximal value t12 of thickness of the ceramic layer 12c is set to three times or less a maximal value t11 of depth of the recesses formed at the surface of turns of the conductor 12b at the axial end surface.

Abstract: An electromagnetic coil includes a conductor winding 12a formed by winding a conductor 12b a plurality of times about a predetermined axis, and a ceramic layer 12c formed through thermal spraying on an axial end surface of the conductor winding 12a, and having a flattened surface. A maximal value t12 of thickness of the ceramic layer 12c is set to three times or less a maximal value t11 of depth of the recesses formed at the surface of turns of the conductor 12b at the axial end surface.