Abstract: A transformer structure is provided having three cores of laminated magnet material positioned to define two transformer winding carriers. In the preferred embodiment, each core is a pair of C-shaped sections arranged in mouth-to-mouth relationship so as to form pairs of legs joined by connecting portions. A first leg of the first core and a second leg of the second core delimit one of the transformer winding carriers. A third leg of the second core and a fourth leg of the third core delimit the other transformer winding carriers. The winding includes a primary transformer winding having at least a first coil and a second coil, and a secondary transformer winding having at least a first coil and a second coil. The first coils of the primary and second winding are wound along the first transformer winding carrier while the second coils of the primary and secondary transformer windings are wound along the second transformer winding carrier.

Abstract: A transformer with twelve cores, a first six arranged in parallel rows of three, a second six, in parallel rows of three at right angles to the first six and positioned between the first and second, and second and third cores of each row of the first six; four coil assemblies each comprising a primary winding and a secondary winding, each of the coil assemblies embracing legs of four cores, the primary and secondary coils being electrically connected in parallel to like coils in other coil assemblies in a 180.degree. out of phase connection. Preferably, each coil assembly includes a capacitor coil, and the capacitor coils are series connected to one another at opposite corner poles so that each capacitor coil voltage is added to each other capacitor coil, the first and fourth of said capacitor coils being electrically connected to different sides of the line voltage, and the second and third of said capacitor coils being electrically connected in series to a capacitor.