| 摘要 |
<p>PURPOSE:To improve the radiating effect by a method wherein, in the power amplifier comprising an electronic device system such as NC device and the like, the radiator with fins on the internal periphery wall is provided in addition to the air-core coils. CONSTITUTION:A first radiator 2 provided with the fin 2a in the axial direction to be separately formed at one position on its periphery, after spreading the external periphery of the air-coils L1-L3 with the grease of excellent thermal conductivity, is adhesively fixed to said air-core cois L1-L3 by means of tightening the flange 26 with a screw 3. A second radiator 4 also provided with the fin 4a in the internal same direction as that of said fin 2a adheres to said air- core coils L1-L3 using the adhesive with excellent thermal conductivity. The radiating effect may be improved in proportion to the additional surface area by means of cooling the over-all surface of the first and second radiators with the draft blown by a cooling blower in the arrow mark direction.</p> |
