MODULAR MULTIPHASE TRANSFORMER Russian patent published in 1999 - IPC

FIELD: transformer manufacture; multiphase semiconductor converters. SUBSTANCE: transformer has internal (central) toroidal spiral magnetic cores, two smooth side toroidal spiral magnetic cores, and intermediate yokes made of thin electric steel sheets. Quantity of internal magnetic cores and intermediate yokes, as well as that of their separating spacers depends on total power capacity of modular transformer. Side cores also abut against extreme internal cores through nonmagnetic shims. Slots on both ends of internal magnetic cores accommodate parts of three-phase distributed primary winding and of multiphase concentrated secondary winding so that both build up magnetic fluxes compensating each other in central part of internal magnetic cores and in intermediate yokes. EFFECT: simplified design and improved total power capacity of modular transformer. 2 cl, 2 dwg