| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent a coil component from thermal deterioration by improving a winding structure and an arrangement of a coil conductor so as to achieve efficient air cooling by suppressing a locally excessive temperature rise due to energization for the coil component mounted on a circuit assembly of an air cooling type electronic apparatus. Ž<P>SOLUTION: The air cooling type electronic apparatus has a structure in which a heat generating coil component (vertical toroidal coil) 1 like an inductor having a coil conductor 1b wound around a core member 1a or a transformer is combined with other components 2, 3 and juxtaposed and mounted on a printed wiring board 4 to form a circuit assembly and a cool air is blown to the circuit assembly to cool the heat generating circuit component. In the coil component 1 of the power electronic apparatus, the coil conductor 1b is wound "densely" in a range facing an air permeating region A of "high" blowing amount and the coil conductor 1b is wound "coarsely" in a range facing an air permeating region B of "low" blowing amount, depending on the blowing amount distribution of the cooling air to be blown to the circuit assembly including the coil component. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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