SU661371A1

SU661371A1 - Current measuring device

Info

Publication number: SU661371A1
Application number: SU782602011A
Authority: SU
Inventors: Сергей Викторович Чигвинцев; Марат Абдуллович Ураксеев; Владимир Альбертович Дрейман
Original assignee: Уфимский Нефтяной Институт
Priority date: 1978-04-11
Filing date: 1978-04-11
Publication date: 1979-05-05

Description

1one

Изобретение относитс к области информационно-измерительной техники и может быть использовано дл измерени токов, а также дл преобразовани угловых перемещений в электрический сигнал по синусной или косинусной зависимости в системах управлени , регулировани и в электромеханических вычислительных устройствах.The invention relates to the field of information-measuring technology and can be used to measure currents, as well as to convert angular displacements into an electrical signal by a sine or cosine dependence in control systems, regulation and in electromechanical computing devices.

Известны устройства, содержащие ферромагнитный трубчатый проводник с продольной пр моугольной прорезью, причем измерительна катушка с сердечником размещена внутри проводника в плоскости, проход щей через его продольную ось и ось прорези, симметрично относительно продольной оси проводника 1.Devices are known that comprise a ferromagnetic tubular conductor with a longitudinal rectangular slot, the measuring coil with the core being placed inside the conductor in a plane passing through its longitudinal axis and the axis of the slot, symmetrically with respect to the longitudinal axis of the conductor 1.

Недостатком данного устройства вл етс невозможность регулировани коэффициента преобразовани , поскольку катущка неподвижна . Это ограничивает функциональные возможности и область применени устройства .The disadvantage of this device is the impossibility of adjusting the conversion coefficient, since the coil is stationary. This limits the functionality and application area of the device.

Целью изобретени вл етс обеспечение регулировки коэффициента преобразовани .The aim of the invention is to provide adjustment of the conversion ratio.

Поставленна цель достигаетс тем, что в устройстве дл измерени тока, содержащем трубчатый проводник, в полости которого размещена измерительна катушка, внутренн цилиндрическа полость выполнена эксцентрично, а измерительна катушка имеет возможность вращени вокруг оси, котора совпадает с осью полости. На фиг. 1 изображено устройство дл измерени тока; на фиг. 2 - то же, поперечное сечение.This goal is achieved by the fact that in a current measuring device containing a tubular conductor in which a measuring coil is placed in a cavity, the inner cylindrical cavity is eccentric, and the measuring coil can rotate around an axis that coincides with the axis of the cavity. FIG. 1 shows a device for measuring current; in fig. 2 is the same cross section.

Устройство дл измерени тока содержит трубчатый проводник 1 с эксцентричной полостью 2, внутри которой на полой оси 3 расположена измерительна катущка 4. Угол между плоскостью, в которой лежат оси трубчатого проводника и полости, и между плоскостью витков катущки обозначен через At.The device for measuring current contains a tubular conductor 1 with an eccentric cavity 2, inside which a measuring coil 4 is located on a hollow axis 3. The angle between the plane in which the axes of the tubular conductor and the cavity lie, and between the plane of the turns of the coil, is denoted by At.

Устройство работает следующим образом .The device works as follows.

Claims

When current flows through the tubular conductor 1, a magnetic field arises in the eccentric conductor cavity. In case of equal magnetic perception of the conductor and the cavity, this field will be uniform. Equality of magnetic permeability can be obtained if the coil is wound on a frame of conductor material, and this frame will completely fill the internal cavity at the location of the turns of the coil. The direction of the magnetic induction vector is perpendicular to the plane in which the axis of the conductor and the cavity lie. If the angle d is equal to zero, then the flux linkage of the coil with the magnetic conductor will be maximum, and, consequently, the induced emf induced in the coil will also be maximum. Depending on the angle of rotation of the coil d, the effective value of this EMF will vary according to the law E cosd. Thus, by turning the measuring coil, you can adjust the conversion coefficient of the current sensor or convert the angular displacements into an electrical signal. The use of this current measuring device allows a smooth, non-contact adjustment of its conversion coefficient. Claims An apparatus for measuring current, comprising a tubular conductor in a cavity of which a measuring coil is placed, stating that, in order to adjust its conversion coefficient, the inner cylindrical cavity is eccentric, and the measuring coil has the ability to rotate around an axis that coincides with the axis of the cavity . Sources of information taken into account during the examination 1. USSR author's certificate No. 480023, cl. G 01 R 19/00, 02.12.72.