THREE-PHASE TRANSFORMER MAGNETICALLY WITH THREE MAGNETIC CORES

摘要

A three-phase transformer (10) comprising a primary portion (11; 12) and a secondary portion (12; 11), the primary portion (11) comprising a first body of ferromagnetic material and primary coils, the secondary portion (12) comprising a second body of ferromagnetic material and secondary coils (28, 29a, 29c, 30), the first body delimiting a first annular notch (22) of axis A and a second annular notch (23) of axis A, the primary coils comprising a first torus coil (24) of axis A in the first notch (22), a second coil (27) of axis A in the second notch (23), and one or more third coils (25a, 25d) connected in series, said third coils (25a, 25d) being wrapped around one of said legs passing into notches (36) in said leg.