Patent ID: 6894596

Claim:
An inverter transformer comprising: a frame-core shaped substantially square; a plurality of I-cores disposed inside and coupled to the frame-core so as to provide a predetermined leakage inductance, the I-cores being divided into first group cores located not adjacent to one another and second group cores located not adjacent to one another but adjacent respectively to the first group cores; a plurality of primary windings provided respectively around the I-cores; and a plurality of secondary windings provided respectively around the I-cores, wherein magnetic fluxes generated in the first group cores by currents flowing in primary windings provided around the first group cores flow in a same direction, magnetic fluxes generated in the second group cores by currents flowing in primary windings provided around the second group cores flow in a same direction that is opposite to the direction of the magnetic fluxes generated in the first group cores, and wherein respective voltages induced at respective secondary windings provided around the first and second group core are polarized identical with each other.