Patent ID: 9153373
Filing Date: 2015-10-06
Classification: H01F

Abstract:
1. A transformer having assembled bobbins, including: a plurality of bobbins each having an annular groove provided on its outer edge and a hollow portion; a plurality of secondary windings disposed between two adjacent bobbins, each of the secondary windings having a through-hole corresponding to the hollow portion; a plurality of protrusions formed on a surface of one bobbin, the surface being faced to a corresponding secondary winding, to surround the hollow portion, the protrusions abutting against the corresponding secondary winding so that a gap is formed between the two adjacent bobbins by the protrusions when the two adjacent bobbins are assembled with each other, wherein the gap is used to facilitate an air convection between the two adjacent bobbins to thereby enhance the heat-dissipating effect to the bobbins; and two magnetic cores penetrating the hollow portions of the bobbins and the through-holes of the secondary windings to assemble them together.