| 摘要 |
PROBLEM TO BE SOLVED: To cool a toroidal coil while avoiding problems in the insulation quality and the airtightness.SOLUTION: A toroidal coil includes: an inductor 113 (a toroidal coil body) where a coil 113b is wound around a toroidal core 113a; and a refrigerant piping 121 (a heat transfer member and a cooling fluid piping) inserted into a center part of the inductor 113. The inductor 113 is cooled by heat transmission through a pipe wall of the refrigerant piping 121. |
