| 摘要 |
PROBLEM TO BE SOLVED: To cool an annular coil efficiently in a power supply unit.SOLUTION: A power supply unit 40 includes a secondary self-resonant coil 42 and a secondary electromagnetic induction coil 44, a cylindrical case 48 housing the coils 42, 44, an inflow side duct 50 provided on the periphery corresponding to the outer peripheral side of the coils 42, 44 on the upper surface of the case 48, a discharge side duct 52 provided in the center on the upper surface of the case 48, and a suction part 54 for sucking the cooling air to flow into the case 48 from the outside thereof via the inflow side duct 50, and to be discharged from the inside of the case 48 to the outside thereof via the discharge side duct 52. The inflow side duct 50 has a guide 51 for guiding the cooling air to flow in the circumferential direction of the coils 42, 44 in the case 48. |
