SU1623A1 - Switching device for receiving a variable electromotive force from a battery of galvanic cells - Google Patents

Description

- This proposal has the ability to convert direct current into alternating current using a switching device with one collector and collector plates of the same width. FIG. 1 shows a diagram of the connections of the converter converter; tii phyy; 2, E-schemes of winding transformer: star-delta or delta-star indicating the method of attachment of brushes; in fig. 4-5-6 show voltage curves of the converted current; on F. 7-- Aavernuyu view of the additional ifShILёktopf c 1pelf Brushes and in FIG. An 8-9 way to connect to a main or auxiliary transformer. If we reject the strictly sinus-shaped curve shape, it is possible to carry out a reducer-transformer with one collector and, at the same time, in segments of divided parts, segments of the same width. The collector for the single circuit design, as seen in the scan of FIG. 7, is divided into four parts; of C01LH, two are uniformly lamellar in terms of the number of groups of batteries and each occupy 60 or 120 electrical degrees, alternating with solid segments of 120 or 60 electrical degrees each. For three-phase current, three brushes are placed at 120 degrees (electric) and three rings. Between the brushes of the collecting rings, a stress curve is obtained, the shape of which is shown in FIG. 4 for the case of 60 degree subdivided segments and in FIG. 5-for the case of 120 gr. Subdivided reservoir sigments. In order, however, to obtain a curve more approximate to the sinusoidal one, it is possible to place another set of rotor brushes at an angle of 30 electrical degrees to the first set, as can be seen from FIG. 1, on which (as in the subsequent ones) one set of brushes is shaded, the other is left white. These brushes will have their three rings. If the current from one set of brushes (in the drawings — from the set of shaded brushes) is introduced into

a transformer circuit in which one of the two windings (primary or secondary) is connected by a star, and the other by a triangle, the shape of the curve in the external circuit changes and takes the form, depending on the division of the collector, or shown in FIG. 4, instead of that indicated in FIG. 5, or vice versa. If, finally, the stress curves obtained from both sets of brushes are added, using one of the circuit diagrams shown in FIG. 2 or 3, an overall curve is obtained, the shape of which is very close to a sine wave and is shown in FIG. 6. The analysis shows that in this curve all the harmonics of the order below II are missing, and the harmonics of the order of 11 and above are less than one percent of the main one.

Based on this, a new form of implementation and a connection diagram of the converter transformer shown in FIG. 1. The proposed form of execution gives a voltage curve with a three-phase or six-phase current that is quite close to a sinusoid, while for a single-phase current, it produces a trapezoidal curve.

This form of implementation, quite suitable for all cases when it is necessary to convert one alternating current into alternating current of a different kind, has for cases of converting alternating current into constant or vice versa the same disadvantages as a two-collector gear with sinusoidal divisions and requires using separate groups of batteries for introducing a group switch.

A radical means of completely eliminating irregularity is to add an additional collector to the mechanism with three brushes and three rings in the case of three-phase current and a corresponding complication of the circuit.

The idea of the proposed adaptation is that, due to the irregularity of the action of groups of batteries, of which the average battery groups participate in the work to a greater extent than the extreme ones, the additional collector circuit is designed so that the middle groups participate in the work continuously for an instant and, moreover, the additional collector works in the opposite sense than the main mechanism, that is, in the case of charging, it transfers current back to the circuit, and in the case of discharge, it takes current from the circuit. Thus, it is possible to regulate both mechanisms in such a way that the average batteries have exactly the same amount of electricity at each moment as all other groups to the extreme. The connection scheme of the main collector with the additional one is shown in FIG. 8 or 9.

SUBJECT OF THE PATENT.

1. A switching device for obtaining a three-phase current from a battery of galvanic cells or batteries, characterized by the cumulative use of: a) a collector (Fig. 1), consisting of alternating segments, partially divided into plates and partially unseparated, and the divided segments occupy parts circles corresponding to Ve or i / 3 fractions of a period, and solid corresponding to 1/3 or 1 / e of a period, b) two sets of brushes sliding along the collector and shifted relative to each other by an angle corresponding to 1/12 of the period period, c) of a transformer, with winding turned on: a star-delta or a delta-star, with the primary winding of which one set of brushes is connected, and the secondary-another set of brushes, either directly (Fig. 3) or through an auxiliary a transformer (fig. 2), in order to obtain a current curve that is close in shape to a sine wave.

2. In the device described in paragraph 1, the application, in order to align the work of individual groups of elements, of an additional collector with three brushes (Fig. 7) connected to an additional (tertiary) star, a winding superimposed on the main one (Fig. 9 ), acc. (Fig. 3), or on an auxiliary transformer (Fig. 8), respectively. (Fig. 2).

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