Patent ID: 9607758
Date: 2017-03-28
CPC Classifications: H01F

Claim:
1. A three-phase transformer comprising: a primary portion and a secondary portion; 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; and the primary coils comprising a first toroidal coil of axis A in the first slot corresponding to a phase U, a second toroidal coil of axis A in the first slot, a third toroidal coil of axis A in the second slot, and a fourth toroidal coil of axis A in the second slot corresponding to a phase W, the second coil and the third coil corresponding to a phase V being connected in series; wherein the winding and connection directions of the second coil and of the third coil correspond, for a current flowing in the second coil and in the third coil, to a first magnetic potential for the second coil, and to a second magnetic potential opposite to the first magnetic potential for the third coil.