Patent ID: 9424978
Filing Date: 2016-08-23
CPC Classification: H01F

Claim Text:
1. A three-phase three-column transformer including a primary portion and a secondary portion and a common symmetry axis A; the primary portion comprising a first body made of ferromagnetic material and primary coils, the secondary portion comprising a second body made of ferromagnetic material and secondary coils; the first body defining a first annular slot of axis A and a second annular slot of axis A, the first slot being defined by a first side leg, a central leg, and a ring, the second slot being defined by the central leg, a second side leg, and the ring; the primary coils comprise a first toroidal primary coil of axis A corresponding to a phase Up of the transformer in the first slot, a second toroidal primary coil of axis A corresponding to a phase Wp of the transformer in the second slot, and one or more third toroidal primary coils connected in series, the third toroidal primary coils corresponding to a phase Vp of the transformer being wound around one of the legs and passing via slots in the one of the legs.