| 摘要 |
<p>PURPOSE:To make it possible to cool from both sides of the outer surface of a winding and an iron core located inside the winding by a method wherein a non-wound part of winding is formed on a part of the circumference of the iron core, and heat-radiating fins are provided on the above-mentioned part. CONSTITUTION:An insulator 10 and a low-tension winding 11 are divided into two parts in circumferential direction and wound alternately on the core 1, which is molded in ring-like shape, in such a manner that a non-wound part 12 of the winding is formed on a part of the circumference of the core 1, and a heat-radiating fins 13 are provided on the non-wound part 12 of the core 1. Accordingly, the heat generated on the core 1 and the winding 11 is conducted toward the outside surface of the winding 11, it is radiated to outside from the outside surface of the winding 11, and besides, the heat is transmitted through the core 1 and radiated to outside by the heat radiating fins 13 provided on the circumference of the core 1. As a result, cooling effect can be improved, a fine strand can be used for the winding, and consequently, the thickness of the winding part can be reduced, and the entire through type transformer can also be made small in size.</p> |
