SU773757A1 - Controllable reactor with magnetization - Google Patents

Description

(54) CONTROLLED REACTOR WITH DRAMGING The invention relates to electrical engineering and power engineering, in particular to ferromagnetic devices, controlled by positive power supply. The known design of an electric reactor controlled by transverse magnetization, containing a magnetic core with rods made as separate magnetizable sections, a control winding divided into sections, and a working winding, each magnetisable section being made in the form of two adjoining ferromagnetic elliptical cylinders, and an elliptical cylinder. control windings in the area of their contact, and the frontal parts of the sections are placed inside the annular ferromagnetic inserts Til. The disadvantage of the design is low manufacturability, as well as a sufficiently large relative content of higher harmonics in the circuit of the working winding. The closest to the invention to the technical essence and the achieved result is the design of a controlled reactor with magnetic biasing containing a core magnetic core on one of the rods which contains non-magnetic gaps, an alternating current winding is located, and on two others, located in a row, two coil and counter windings of the submagnetics, covered by another AC winding, connected in parallel and in accordance with the first G21. Its disadvantage is the increased high active power loss and a high content of higher harmonics in the reactor current. The purpose of the invention is to reduce the magnitude of active power losses put (ul reducing the content of higher harmonics in the reactor current. The goal is achieved by the fact that a controlled magnetic biasing reactor containing a core magnetic core, on one of the rods containing nonmagnetic gaps, there is an alternating current winding and on the other two, located side by side, there are two connected in turn and counter-winding bias windings, covered by another winding of alternating current connected in parallel and according to First, it is equipped with two additional DC windings connected in opposite directions and placed on the fourth outermost rod, one of which is connected in series with the bias windings, forming a DC circuit, and the other parallel to the circuit.

FIG. I schematically shows the type and connection of the reactor windings; in fig. 2 variant of the structural design of the reactor; in fig. 3 shows section A-A in FIG. 2. A controlled magnetizing reactor contains a core magnetic circuit 1, on one of the rods 2 of which, containing non-magnetic gaps, there is a winding 3 of alternating current, and on the other 4, located in a row, pause the two connected magnetize windings 5, covered another alternating current winding 6, connected in parallel and in accordance with the first 3, gphic reactor, is equipped with two additional windings 7 and 8 of constant current connected in opposite directions and placed on the fourth extreme rod 9 One of which J7 is connected in series with the bias windings 5, forming a DC circuit, and the other 8 is parallel to the aforementioned circuit.

The device works as follows.

Some of the terminals of the AC coils 3 and 6 are connected to the mains neutral, while others are connected to earth.

The sum of the magnetic fluxes Ф and Ф2А / created by current I flowing through the winding 6 of the alternating current, is equal to the magnetic flux i ri created by the current flowing through the winding 3 of the alternating current. In this case, the magnetic flux of the main frequency in the additional (fourth) rod is absent, as a result of which the windings 7 and 8 do not emit the main frequency frequency,

In the absence of a subcircuit, the reactor current is mainly determined by the current 7 of the winding 3 of the alternating current.

which is explained by the presence of non-magnetic gaps in the rod on which this winding is located, in order to conduct through which the magnetic flux F; J a large MDS is required.

When current flows in the bias windings 5, the volume of steel inside the alternating current winding 6 is magnetised, which leads to a change in the magnetic resistance to the flux Φ. + Ф2-. consequently, the alternating current -i in the winding 6. Since the rod containing the electromagnetic gaps is not magnetized, the resistance to the magnetic flux f in this rod remains unchanged, and the current 1/21 of the alternating current winding 3 remains unchanged.

The magnetic fluxes f and fs of the additional windings 7 and 8 of the fourth rod 9 pass through the said rod, along the sections of the upper and lower phm connecting the fourth rod with two average 4 and are closed through

the latter are mutually subtracted, which leads to an increase in the inductive resistance of the winding 7 in order to reduce the variable component of the bias circuit current (mainly double current)

frequencies).

Since the magnitude of the highest odd harmonics in the reactor current depends on the magnitude of the higher even harmonics in the bias current, then with decreasing

last, the harmonic composition of the reactor current is improved and, accordingly, the magnitude of active power loss is reduced.

Claims (2)

Invention Formula A controlled reactor, with bias, containing a magnetic core, on one of the rods of which contains .. non-magnetic gaps, is located an alternating current winding, and on two others, located nearby, there are two included: sequentially and transversely magnetic bias winding, covered by another alternating current winding, connected in parallel and in accordance with the first, i . Due to the fact that in order to reduce the magnitude of active power losses by reducing the content of higher harmonics in the reactor current, it is equipped with two additional DC windings connected in opposite directions and placed on the fourth outer st. rod, one of which is connected in series with the bias windings, form a DC circuit and the other is parallel to the circuit. Sources of information taken into account in the examination 1, USSR author's certificate No. 4416О1, cl. H 01 F 29/14, 1974. 2. US patent number 3373347, cl. 323-89, 1968. BUT -3 b 1/2. 2