Patent ID: 7221252
Filing Date: 2007-05-22
Classification: H01F

Abstract:
1. A transformer, comprising: a primary winding coil; plural secondary winding coils; a first winding portion for winding said primary winding coil thereon; plural second winding portions for winding said secondary winding coils thereon and disposed at two sides of said first winding portion; plural partition plates disposed between said first winding portion and said second winding portions, respectively, and each said partition plate having a slot; a channel penetrating said first winding portion, said second winding portions and said partition plates; and a magnetic core assembly comprising an I-shaped magnetic core and a U-shaped magnetic core, said I-shaped magnetic core being received in said channel and said U-shaped magnetic core having plural protrusions inserted into said slots of said partition plates; thereby a leakage inductance of said transformer is adjusted by a distance between said protrusions of said U-shaped magnetic core and said I-shaped magnetic core received in said channel.