THREE-PHASE TRANSFORMER Russian patent published in 1995 - IPC

FIELD: electrical engineering; converters and transformers. SUBSTANCE: transformer has three toroidal cores 1,2,3 with different section rectangular hysteresis loop determined basing on conditions given in description of invention. Each core is embraced by its own magnetizing winding W₁₁, W₁₂, W₁₃ with number of turns determined according to conditions W₁₁≥ 1,2 W₁₂, W₁₁≥ 2,4 W₁₃, and connected in series aiding, and output winding divided into three sections so that first output sections of core windings are connected in series aiding to each other and form first phase of transformer, and second and third sections are connected in series opposite and form second and third phases of transformer, respectively. Owing to use of separate magnetizing windings for each core, magnetic polarity of cores is reversed not simultaneously, but in turn, one after the other, and emf pulses of phases shifted through 120 degrees appear in output three-phase windings. EFFECT: conversion of single phase voltage into three-phase voltage. 2 dwg