Patent ID: 7728708

Claim:
A transformer apparatus comprising: an inverter transformer having a primary coil and a secondary coil; the inverter transformer operative to generate a first magnetic flux; a balance transformer having a primary coil and a secondary coil; the balance transformer operative to generate a second magnetic flux; wherein the inverter transformer and balance transformer are integrally formed by sharing a part of a core portion of the transformer apparatus such that directions of the first and second magnetic fluxes are the same in the part of the core portion; wherein the primary coil of the inverter transformer is wound on a center core portion of an H-shaped core portion of the inverter transformer; wherein the secondary coil of the inverter transformer is wound on a core portion of an I-shaped core portion of the inverter transformer; and wherein the primary coil and the secondary coil of the balance transformer are wound on a center core portion of an E-shaped core portion of the balance transformer.