Patent ID: 7345567

Claim:
A two-output inverter transformer comprising: a bobbin that has a winding shaft, an end block provided at either end of the winding shaft, two intermediate blocks spaced apart on the middle of the winding shaft, a portion between the two intermediate blocks around which a primary winding is wound, and portions on both sides of the primary winding portion between the intermediate block and the end block around which secondary windings of the same winding structure are wound respectively; a pole-like core inserted into the winding shaft; a rectangle frame-like core combined with the pole-like core and placed to surround the primary winding and the secondary windings; and gap sheets of the same thickness interposed between the pole-like core and the rectangle frame-like core at both ends of the bobbin respectively, wherein L 1 , L 2 , and t are set such that L 2 −L 1 >2 t, where L 1 is the length along the winding shaft of the rectangle frame-like core, L 2 is the length of the pole-like core, and t is the thickness of the gap sheet, and wherein the pole-like core and the rectangle frame-like core are so combined that the pole-like core protrudes evenly from the opposite end faces of the rectangle frame-like core.