SU484576A1 - Three-phase controlled reactor with rotating magnetic field - Google Patents

Description

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The invention of oioids to electrical engineering and power engineering and can be used in the design and manufacture of controlled reactors with a rotating magnetic field.

Known controlled rotating-field reactors consist of a cylindrical magnetic conductor, in which it is located a three-phase drum operating winding and a toroidal DC control winding, for example, both tubes. When the amount of direct current in the control winding is changed, the inductive resistance of the apparatus is adjusted. Oia are characterized by the presence of two types of windings - a three-phase drum and a toroidal control winding; significant but the value of e. d. induced in it by a rotating magnetic flux over pole division.

The purpose of the invention is to reduce the winding material and simplify the reactor design by deforming the second harmonic of the current. This is achieved by the fact that the working winding is filled with a toroidal one, for example, with four parallel branches, to the zero points of which a source of constant current is connected.

FIG. 1 shows the placement of toroidal windings on the reactor frames; in fig. 2 is a schematic diagram of the connection of the windings into parallel branches, where, Cs-Cz, Cz-Sv, etc., are the beginning and the ends of the phase windings.

In the grooves 1 of an annular laminated 13 electrical steel magnetic core 2, a three-phase toroidal winding 3 is laid with two parallel branches on each river and with a phase zone of 60 electrical degrees.

When the winding is placed on the frame, the first parallel branch is formed by coil weights A, B, C, shifted by 120 electrons degrees relative to each other. The second branch is formed by X, Y, Z coil groups shifted relative to the first branch by 180 electrical degrees. With this order of connection of the coil groups on the rod, when the PA is supplied with a three-phase voltage circuit, the magnetic flux will be rotating, as in a conventional three-phase electric machine. A constant current / y is applied to the zero points of the parallel branches, creating a constant magnetic flux (a switch providing the magnetization of the core, and which is located a winding (/ is an alternating current).

With the arrangement of the windings of the both edges and the above scheme of connection of the coil groups, the constant magnetic fluxes act in the same direction both in the external and in the inner frame, carried out their biasing. The number of parallel branches on the side of alternating current when pg and pma magnetizing one and the other is equal to four.

Combining the properties of a three-phase winding and a control winding in one toroidal winding simplifies the design of the reactor and reduces the consumption of winding material.

The second harmonic of the magnetic flux arising at the magnetization of the magnetic flux is induced in parallel branches x of each phase e. D. s., sdnnutye "and 180 electrical degrees. Under their action, an equalizing current arises between the branches, which closes in the contour of the branches and does not penetrate into the network.

This current additionally magnetises the device and creates a magnetic flux, damping the second harmonic of a magnetic flux.

Subject invention

A three-phase controlled reactor with a rotating magnetic field consisting of two cylindrical grooved magneto-conductors with grooves made of two layers of ferromagitic material inserted one into the other without a gap, in which the working winding and the bias winding are covered by one of the main winding and one magnetically covered winding, one of the main winding and one magnetically covered winding, one of the main windings and one magnetically wound magnetic core with the grooves in which one of the cores is covered by the main winding and the magnetic winding is enclosed by one of the main windings and one magnetically enclosed, one of the main windings and one magnetically, one of the main windings and one magnetically enclosed magnetic winding, one of the main windings and one magnetically wired magnetic cores. , characterized in that, in order to reduce the winding material and simplify the design by damping the second harmonic of the flow, the working winding is made toroidal with several, for example, etyrm parallel legs of and to its bullet points connected DC source.

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