Patent ID: 6201463
Filing Date: 2001-03-13
Classification: H01F

Abstract:
An inverter transformer comprising:an insulating bobbin including a base portion having terminals attached thereto, and a spool upwardly extending from center of said base portion, said insulating bobbin being formed with a hole extending through said spool;a primary winding wound on said spool;a secondary winding disposed under said base portion and electromagnetically coupled to said primary winding;a pair of cores formed of a magnetic material, said pair of cores being disposed in abutting relationship with each other holding said bobbin therebetween from above and below; anda center leg provided on at least one of said cores and adapted to be inserted in an aperture of said spool;wherein a plurality of grooves are defined by a plurality of flanges provided at side surface of said spool; said primary winding is provided in one of said grooves; said groove having no winding provided therein is interposed between said primary winding and said secondary winding; and an air gap is defined between said center leg and said secondary winding.