SU1457005A1

SU1457005A1 - Transformer for railway loads

Info

Publication number: SU1457005A1
Application number: SU874247686A
Authority: SU
Inventors: Владимир Сергеевич Воротников; Ирина Адольфовна Румянцева
Original assignee: Московский Институт Инженеров Железнодорожного Транспорта
Priority date: 1987-05-20
Filing date: 1987-05-20
Publication date: 1989-02-07

Abstract

Изобретение относите, к электротехнике . Целью изобретени вл етс повышение качества и уменьшени потерь электроэнергии за счет снижени несимметрии напр жений и токов летающей трехфазной сети. Трансформа- тор содержит трехстержневую магнитную систему со стержн ми 1, первичную обмотку из трех одинаковых катушек 2, расположенных на всех стержн х сердечника и соединенных, например, в звезду, одну вторичную обмотку, состо щую из трех одинаковых катушек 3, также расположенных на всех стержн х сердечника и соединенных по схеме звезда, и другую вторичную обмотку , состо щую из четырех катушек 4, 5, 6 и 7. При этом две катушки 4 и 7 расположены на крайних стержн х магнитопровода и имеют одинаковое число витков, а две другие 5, 6 расположены на среднем стержне и имеют кажда число витков, равное 0,594 от числа витков катушек 4 и 7. Катушки 4, 5, 6 и 7 соединены последовательно и присоединены к трем отводам 8, 9 и 10. Начало катушки 4 соединено с началом катушки 5, конец катушки 5 соединен с концом катушки 6 и начало катушки 6 соединено с началом катушки 7. Отвод 8 сделан от конца катушки 4 фазы а, отвод 9 сделан от конца катушек 5 и 6 фазы в и отвод 10-сделан от конца катушки 7 фазы с. 2 ил. (ОThe invention relate to electrical engineering. The aim of the invention is to improve the quality and reduce the loss of electricity by reducing the asymmetry of voltages and currents of a flying three-phase network. The transformer contains a three-rod magnetic system with rods 1, the primary winding of three identical coils 2 located on all core rods and connected, for example, in a star, one secondary winding consisting of three identical coils 3 also located on all core rods and star-connected, and another secondary winding, consisting of four coils 4, 5, 6 and 7. In this case, two coils 4 and 7 are located on the extreme rods of the magnetic circuit and have the same number of turns, and the other two , 6 located The yens are on the middle rod and each have a number of turns equal to 0.594 from the number of turns of coils 4 and 7. Coils 4, 5, 6 and 7 are connected in series and connected to three taps 8, 9 and 10. The start of coil 4 is connected to the start of coil 5, the end of the coil 5 is connected to the end of the coil 6 and the beginning of the coil 6 is connected to the beginning of the coil 7. The outlet 8 is made from the end of the coil 4 of phase a, the outlet 9 is made from the end of the coils 5 and 6 of phase b and the outlet 10 is made from the end of the coil 7 of phase c . 2 Il. (ABOUT

Description

Фиг.гFigg

Claims

Claim

A transformer for railway loads, containing a three-core magnetic system, a primary three-phase winding, two secondary windings, the first of which is three-phase symmetrical, characterized in that, in order to improve the quality and reduce energy losses by reducing asymmetry, the second secondary winding consists of of two pairs of sections, sections of the first pair are placed on one rod, their number of turns is 0.594 the number of turns of sections of the second pair, which are placed one on the other two rods, two sections with different the number of wit | forks are connected in series and opposite and form two phases of the second secondary winding, designed to power two identical single-phase (railway) loads.