| 摘要 |
PURPOSE:To prevent the temp. rising of coolant by stirring the coolant by rotating an electric conductor to forcedly convect the coolant and increase the heat diffusion. CONSTITUTION:A coil composing of copper wire 1 and iron core 2 is dipped in insulating oil 10 in a vessel passing through cooling water 4 and further a rotated stirring device composing of propeller 7 and electric conductor 6 is arranged in the insulating oil 10. At the time of generating the rotating force in the electric conductor 6, the insulating oil 10 is stirred by the propeller 7 connected with the electric conductor 6 to forcedly convect. In this way, the conductive heat quantity is increased and the current density in the copper wire is further increased and so the apparatus can be compacted. |
