Londa and Traub LLP
Inverter transformer
 In an inverter transformer comprising a primary winding and secondary winding which are wound on a first and a second spool respectively and disposed in juxtaposing relationship.with each other with the axes of the first and second spools being substantially parallel to each other, and a pair of cores which are disposed in abutting relationship to each other so as to define a closed magnetic path, the primary and secondary windings being electromagnetically coupled to each other through the pair of cores, at least one of said cores being provided with a protuberance which is disposed in opposing relationship to the other core, with a small distance maintained therebetween, the protuberance being interposed between the primary winding and the secondary winding, the arrangement is made such that secondary-side minimum sectional area of that portion of the cores through which magnetic flux is permitted to pass, is given substantially by S.sub.1 K, where S.sub.1 is primary-side minimum sectional area of that portion of the cores through which magnetic flux is permitted to pass, and K is the electromagnetic coupling coefficient between the primary winding and the secondary winding. 
Toko, Inc.
H H H H
H01F H01F H01F H01F
inventional inventional inventional inventional
Minoru Kazuhiro Koji Shigetoshi
Nakano Ishikawa Ito Watanabe