THREE-PHASE TRANSFORMER Russian patent published in 1995 - IPC

FIELD: electrical engineering. SUBSTANCE: three-phase transformer is composed of three toroidal cores 1, 2, 3 of magnetic material with rectangular hysreresis loop differing from each other by coercive force determined by conditions H_c2 ≥ 2H_c1;; H_c3≥ 3H_c1. Each of them is embraced by three output windings W_21a, W_21b, W_21c(W_22a, W_21b, W_21c), (W_23a, W_23b, W_23c), and all cores are simultaneously embraced by common magnetization winding W₁.. First output windings of all cores W_21a, W_22a, W_23a are interconnected in series siding and form first phase of three-phase transformer, second output windings of all cores (W_21b, W_22b, W_23b) are interconnected in series opposition and form second phase of transformer, third output windings of all cores (W_21c, W_22c, W_23c) are interconnected in series aiding and form third phase of transformer. Leads of phases come together at single point. Specified aggregation of indications makes it possible to conduct process of successive remagnetication of cores 1, 2, 3 of transformer and transform single-phase voltage into three-phase one which significantly simplifies design of three-phase inverters. EFFECT: simplified design of transformer, expanded operational field. 3 dwg