SU970581A1 - Induction machine three-phase winding - Google Patents

Description

(54) THREE-PHASE WARMING INDUCTION MACHINE

one

The invention relates to electrical engineering, relates to the improvement of the winding of an induction machine, preferably flat-panel, and can also be used in induction machines with a concentric magnetic system.

The three-phase winding of an induction machine with flat concentric coils of two standard sizes, placed in different parallel planes 1, is known ..

Disadvantage. such a winding is a poor use of winding copper.

The three-phase winding 15 of the induction machine is the closest to that offered by technical sushitnosti, mainly with the magnetic circuit open, containing flat coils placed in three parallel layers, of which 1/3 part is made with diametral and 2/3 with shortened pitch, 20 equals 1/3 pole division, and in each phase, on two pole divisions, coils with a diametrical pitch are placed in different layers x 2.

A disadvantage of the known winding is the low winding ratio, which degrades the electromagnetic characteristics of the machine.

The purpose of the invention is to increase the electromagnetic characteristics by increasing the winding ratio.

This goal is achieved by the fact that cutter rods with a shortened pitch in each phase are placed in three parallel layers, and coils with diametrically pitch are connected in series with the coils that have a shortened pitch, and are placed relative to them concentrically.

FIG. 1 shows the proposed scheme. three-phase winding induction machine with the number of grooves per pole and phase equal to one and the number of grooves equal to 12; in fig. 2 placement of the coil sides of the winding in the grooves of the magnetic core for all three lines of the induction machine winding.

Claims (2)

The beginnings and the ends of the phases (Fig. 1) are denoted by A-X, B-Y, C-Z and the same symbols, respectively. 397 startings are stored for the active sides of the coils of each phase. The top layer of the coil is depicted by contour lines, the middle one is thin, and the bottom one is dotted. The coils with full pitch T and concentric with them coils with shortened pitch equal to - | - T are connected in series and are completely upper and lower parallel to each other layer. In order to ensure that the phase resistance of the windings in each phase is equal, the coil of the upper layer is alternated with the coils of the lower layer through the double pole division. The winding coefficient of the multilayer winding can be determined by the ratio of the geometrical sum of the phase vectors placed in one slot to their arithmetic sum. Slots 1-12 (Fig. 2) are filled in the open magnetic circuit 13. Groove 5 is selected at the beginning of the calculation (Fig. 2) Geometrically, phase vectors are added, and phase A is placed in this slot. The geometric sum of the three vectors is A + A 2A. When | And I 1 2 I And 1 - 2. By folding in the same way as the phase vectors in slot 6, A + J Z and Z + Z 2Z are obtained. When 1 Z And 1 2 | Z | -2 In slot 7 get 2 | In I 2 and 1gak, the phase alternation is repeated in accordance with the increase in the number of grooves through an angle of 60. This means that the winding is six-zone with the winding coefficient Kob 4 0667. From the calculation it can be seen that the winding coefficient of the proposed winding is higher by about 58 compared with the prototype. This allows you to increase the magnetizing force, EMF and, accordingly, increase. Power and efficiency of the machine ™. The invention is a three-phase winding of an induction machine, preferably with an open magnetic circuit, containing flat coils placed in three parallel layers, of which 1/3 part is made with diametrical and 2/3 with shortened pitch equal to 1/3 pole division, and in each a phase with two pole divisions, coils with a diametrical pitch are placed in different layers, characterized in that, in order to improve the electromagnetic characteristics by increasing the winding coefficient, the coils with shortened pitch in each phase are placed s in three parallel layers, and a diametral pitch coil connected in series with the coils having a shorter pitch, and are arranged concentrically with respect to the seam. Sources of information taken into account during the examination 1. USSR author's certificate No. 202296, cl. H 02 C 3/12, 1963. 2. USSR author's certificate for application No. 2894750 / 24-07, cl. H 02 K 41/025, HAT SUL SUA 1AU ZAB VP VHS Ui (UCA A1 A2 I I Ji Y6 6/4 6Z & Q6D 6 / Fig .- / / J /