FREQUENCY CHANGER Russian patent published in 1994 - IPC

FIELD: conversion engineering. SUBSTANCE: frequency changer has magnetic-material circuit with rectangular hysteresis loop, two electrically isolated primary and secondary windings; magnetic circuit carries primary winding and is built up of n cores, where n = 2k+1, k = 1,2,3; cores have different mmf of reversal of magnetization; transformer secondary winding is formed by windings connected differentially in series, each being mounted on one of cores. EFFECT: provision for conversion of input AC voltage at frequency f₁, into output voltage at frequency f₂=G×f₁, where n = 2k + 1, k = 1,2,3 . . . . 5 dwg