| 摘要 |
PROBLEM TO BE SOLVED: To achieve a miniaturized, light weight, and low cost apparatus by collecting the heat loss, produced from a winding of an electromagnetic apparatus, by a heat pipe cooling mechanism and by releasing the heat to the outside to carry out cooling. SOLUTION: A plurality of electromagnetic apparatus bodies 1 are received in the gap part between the body 1 and a case 3 to receive it or in the case 3, and the body 1 is received in the gap part between those bodies 1 or in the case 3 having a stepped upper surface, and a heat collecting plate 11 of a heat pipe cooling mechanism is provided in any gap part between the lower stage side case 3 of the stepped case 3 and the body 1. Then, a radiation fin 8 of the heat pipe mechanism is provided so that it is exposed upward from the case 3, and this stationary inductive electromagnetic apparatus further has a cooling fan 10 for the radiation fin 8. When the area of this radiation fin is denoted by Sf [both sides/sheet (m<2> )], cross-sectional area of the heat pipe Shp (m<2> ), plate thickness of the radiation fin tf (m), heat conductivityλ(W/m.h. deg.C), these are in a relation denoted by formula I, and the wind velocity by the cooling fan 10 is made to be not less than 1.5m/s.
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