METHOD OF CONTROLLING SWITCHING UNIT OF BOOSTER TRANSFORMER FOR MEASURING VOLTAGE Russian patent published in 1995 - IPC

FIELD: conversion technique. SUBSTANCE: method comprises steps of forming two timing intervals, having the same duration, equal to a period of switches T_sw, commutation, being no more, than a half-period of mains voltage. Each timing interval is formed by three time intervals with variable durations, whose sum is equal to the period of the switches commutation. According to such method a relation between the time intervals is determined by an identity T_sw= 2(α₁+α₂)=β₁+β₂=2(γ₁+γ₂),, where α₁ and α₂ -duration values of first time interval in the first and second timing intervals respectively; β₁ and β₂ duration values of second time interval in the first and second timing intervals respectively; γ₁ and γ₂ duration values of third time interval in the first and second timing intervals respectively. That provides symmetrical formation of booster voltage relative to the mains voltage with in an increase of a modulation frequency of the booster voltage. EFFECT: enhanced reliability of controlling. 1 cl, 4 dwg, 1 tbl