SU1646004A1

SU1646004A1 - Current transformer

Info

Publication number: SU1646004A1
Application number: SU884625054A
Authority: SU
Inventors: Светлана Вячеславовна Давыдочкина
Original assignee: Рязанский Радиотехнический Институт
Priority date: 1988-12-26
Filing date: 1988-12-26
Publication date: 1991-04-30

Abstract

Изобретение относитс к измерительной технике. Цель - увеличение помехозащищенности и расширение рабочего диапазона частот. Трансформатор тока состоит из кольцевого магнитопровода 1, на котором намотаны две ветви обмотки 2 и 3, соединенные согласно параллельно и имеw ющие равное количество витков. Направление намотки витков одинаково, а шаг противоположен . Кажда ветвь состоит из двух равных по числу витков половин, расположенных попеременно во внутреннем и наружном сло х, что позвол ет получить равенство проекций площадей обеих ветвей на плоскость симметрии Магнитное поле помех в каждой ветви наводит ЭДС. равные по величине и противоположные по направлению , которые взаимно компенсируютс на общих выводах параллельных ветвей Дальнейшее увеличение помехозащищенности достигаетс тем, что в точках пересечени проводников разных ветвей провод одной ветви размещен между отдельными проводниками другой ветви перевитыми между собой В результате ток от помех уменьшаетс , и рабочий диапазон частот расшир етс 1 з п ф-лы 3 ил (А СThis invention relates to a measurement technique. The goal is to increase the noise immunity and expand the working frequency range. The current transformer consists of an annular magnetic circuit 1 on which two branches of winding 2 and 3 are wound, connected in parallel according to each other and having an equal number of turns. The direction of winding turns is the same, but the step is opposite. Each branch consists of two halves equal in the number of turns arranged alternately in the inner and outer layers, which makes it possible to obtain equality of the projections of the areas of both branches onto the plane of symmetry. The magnetic field of interference in each branch induces an emf. equal in magnitude and opposite in direction, which are mutually compensated for the common pins of parallel branches. Further increase in noise immunity is achieved by the fact that at the intersection points of the conductors of different branches the wire of one branch is placed between individual conductors of the other branch intertwined. frequency range expands 1 s p f-ly 3 sludge (A C

Description

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Claims

Claim

1. A current transformer containing an annular magnetic circuit, primary and secondary windings, a secondary winding consists of two layers with an equal number of turns, uniformly wound on the magnetic circuit in one direction and adjacent to each other leads, characterized in that, in order to increase the noise immunity and expanding the operating frequency range, the secondary winding is made of two branches having the opposite winding pitch, each branch consists of two equal in number of turns halves, located alternately in the inner and outer winding layers are interconnected branches according parallel.

2. Transformer pop. 1, wherein the wire of one of the branches is split into several conductors interconnected, at the intersection points of the turns of different branches, the wire of the second branch is placed between the individual conductors of the first branch.

Figure 2

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