| 摘要 |
PURPOSE:To make uniform the temperature distribution of each part of an iron core by a method wherein the generated heat corresponding to the quantity of radiant heat coming from the surface part of the iron core is added by increasing the generated loss of the surface part of the iron core. CONSTITUTION:Each of magnetic material bodies 13 is wound around between wound layers of the amorphous magnetic alloy thin plate 12 on the outer circumferential surface of a wound core 11 and the wound core 11 located adjoining to the outer circumferential surface of the wound core 11. The magnetic material body 13 has a large loss generating value, and a silicon steel plate (Curie point of approximately 700-800 deg.C, average thickness of approximately 0.35mm), which has the Curie point higher than that of the amorphous magnetic alloy thin plate 12 (Curie point of approximately 500-550 deg.C), can be used for said magnetic material body 13. Then, two wound cores 11 are arranged, and an exciting coil 14 is wound (temporary winding) on the leg part located outside each wound cores 11 in such a manner that their winding direction is reversed each other. When an annealing is performed for the purpose of removing the distortion of the wound cores 11, the exciting coil 14 is connected to a high frequency AC power source 16 using a change-over switch 15, and a high frequency AC current is applied to the exciting coil 14 by adjusting voltage using a voltage adjuster 18. When an AC current is applied to the exciting coil 14, heat is generated on the amorphous magnetic alloy thin plate 12 and the magnetic material body 13. |
