ELECTROMAGNETIC INDUCTION DEVICE

PURPOSE:To provide effective cooling operation, by a method wherein a bottom plate is set on the bottom portion between two insulating cylinders to improve cooling efficiency for the coil, origin of heat, and the coil is put in condensate completely. CONSTITUTION:Condensate 10 made by condensing refrigerated gas is supplied to a dropping unit 9 through a pipe 12 by a pump 11. The condensate, then, is made droplet through small holes 91, and dropped onto a core 6 and a coil 7. The bottom plate 15 is set on the bottom portion of the internal insulating cylinder 13 and external insulating cylinder 14 that are placed inside and outside of the coil 7, forming a container 16 where the condensate 10 dropping from the dropping unit 9 is stored. The coil is always put in the condensate 10 partially or completely, so the heat of the coil 7 is dispersed there, that is, boiling-and- cooling is performed in which cooling is made by absorbing the vaporization heat of the coil 7.