Patent ID: 8305183
Filing Date: 2012-11-06
Classification: H01F,H02M

Abstract:
1. A transformer operating at a single frequency for multiple voltage output power supplies comprising a magnetic core and a plurality of windings, at least some of which give effect to fractional windings, arranged about the magnetic core, wherein the transformer further comprises a dual transformer structure having a main transformer on a first core and an auxiliary transformer on a second core not magnetically coupled to the first core, at least one secondary winding of the main transformer being coupled to a primary winding of the auxiliary transformer, wherein voltage on the at least one secondary winding of the main transformer is an input voltage to the primary winding of the auxiliary transformer, and at least one secondary winding of the auxiliary transformer being coupled to a secondary winding of the main transformer to generate one of the multiple voltage outputs, wherein the effect of fractional windings is provided without utilizing fractional windings.