SU1495917A1 - Combined electric machine three-phase winding - Google Patents

Abstract

The invention relates to electrical engineering. The purpose of the invention is to simplify the design and manufacture, as well as reduce copper losses. The winding of the combined electric machine with the numbers of pole pairs of the fields P ₁ P ₂ = 1/5 is made with pole strength P ₂ = 5 in Z = 36 slots from fifteen distributed coil groups with concentric coils and contains groups with numbers 1 + 3 K in the first phase , 2 + 3 K in the second phase, 3 + 3 K in the third phase, included in each phase in series according to, where K = 0, 1, 2 ... P ₂ -1 = 4. Each coil contains two coils with steps the slots Y _p = 5 and 3. The angle of displacement between the axes of the coil groups of the third and fourth, fifth and sixth, eighth and ninth, tenth and eleventh and four fourths that of the fifteenth and first one is 3 Α, and between the axes of the other groups - 2, where Α = 360 ° / Z = 10.0 °. For the coil groups, the second, seventh, twelfth sides of the inner coil are located in the slots single-layer with the number of turns 2 WK, and for the remaining coils of the groups two-layer with the number of turns WK and the grooves 11, 12, 23, 24, 35, 36 contain WK turns . 6 Il.

Description

The invention relates to coils of electric combined AC power with two opposite-pole magnetic fields in a common magnetic conductor and can be used, for example, in a single-transducer, nx h-gota and number of phases.

The purpose of the invention is to simplify the design and manufacture, as well as reduce copper losses.

FIG. 1 shows the scheme of the proposed winding; Fig. 2 shows alternations of its phase zones; in fig. 3 is a diagram of the shift of the axes of the coil winding groups for a polarity of p 5; in fig. 4 - EMF diagram induced in groups of phase (C1) winding field with a polarity of p 1; in fig. 5 and 6 - polygons MDC

31A9

 for the proposed n two-layer known: well-known windings, respectively.

The winding (fig, 1) is made with p, j, 5 in 7, 36 grooves with but: measures from 1 to 36 out of 15 coil s1x groups (with numbers from 1g to 15g) with; two luminescent katuics; with steps along the grooves of 5 and; 3. Phases contain groups with the numbers I 1g, 4g, 7g, South and 13g in the first phase, 2g, 5g, 8g, 11g and 14g in the second phase, Зг, 6g, 9g, 12g and 15g in the third phase . In each phase of the group included | sequentially-according and start

| phases are designated as G1, C2, NW (phases 1 windings of figure 1 are connected in a star). DP groups 2g, 7g. And 12g inner coil has 2w. turns and made a single layer, and all. the remaining coils of the groups have w turns and are double-layered, with the slots with numbers 11, 12, 23, 24, 35 and 36 containing W, the turns and are half filled (in FIG. 2, these grooves are shaded). I The angle of displacement between the axes of the groups I Зг and 4г, 5г and 6г, 8г and 9г, South and | 11г, 13г and 14г, 15г and 1г is 3, and between the axes of the other groups - 2а: (Fig. 1), where o 360 / Z 10.0 °;; The arrows in FIG. 1 show the directions of the three-phase current during winding feeds through C1, C2, NW (p 5) and they correspond to the alternation of the phase zones indicated in FIG. 2 as A-Z-B-X-C-Y. The emf of the coil groups is proportional to the coefficients of the bobbin: their coils are equal: for polarity pj 5 with pole division: 36/10 3,6sin (ff5 / 2-3,6) + 2sin (B / 2 x хЗ, 6 ) 0.8192 + 2-0,, 7510 dl of groups 2g, 7g, 12g and 0.8192 + 0.9659 1.7851 for the other groups; for polarity p j 1 with pole division 36/2 18-sin (F-5/2 18) + 2sin (Jr3 / 2-18) 0.4226 + 2-0,, 9403 for groups 2g, 7g, 12g and 0 , 4226 + 0,, 6814 for other groups.

According to the diagram of the shift of the axes of the coil groups for the polarity of p2 5 (Fig. 3), the E71C phase, the winding coefficient and the average step of the coils along the grooves are determined:, 7510 + 2x1, 7851 x (cos10 ° + co, s20) 9.62) 8, K 05-5 9.6218 / 11 0.8747 and U 3.909. According to the diagram of FIG. 4 for the EMF of the mutual inductance of the phase (C1) from the floor with the polarity.

Q

0 5 o

five

five

0.9403 + 2 / 0.681 4 (go.h70 -co.ch40) 0,

For the construction of polygons No. 1C (Figs. 5 and 6), the known auxiliary triangular grid 3j and its side taken as 0.5 units are used, and the EMF vectors of the phase zones are depicted in the center of many polygons. For the MDS winding polygon in FIG. 1 (FIG. 5) is determined.

 12

RO at R 23/6 is a square of average 1 Z,

go radt, sinus of its groove points (i 1-36); R2 (|| -0.8747-) 2

 3.37681 is the square of the radius of the circle for the main harmonic MDS, where 33/36 is the average value of the current of the groove (for the winding of FIG. 1, 33 slots of 36 are filled); 6 () 2 -. x100 13.519% is the coefficient of differential pp scattering, which characterizes the quality of the winding in terms of the content of higher and lower harmonics in its VAT curve,

Jinn 4, a known two-layer winding with P2 5, Z 36, y 3, Krb 0.9416 in FIG. 6, is determined: Rg. 32/6; R2 (36-0.9416 / 5 (), 65691 and d-d 14.525%; EMF LE, for such a winding, calculated like the winding of FIG. 1, is equal to LE, 0.596; For a single-layer winding with p 5, Z 36, y „3, Ko6j 0.9271, R | 32/6; R2 4,51459 and 6d 18.135%, ALE, 1.028,

Thus, the proposed winding is much simpler than the two-layer f4 known, has a smaller (14.525 / 13.53 1.07 times) coefficient Cf and a smaller (0.596 / 0.362 1.65 times) EMF LE.,. Compared to the single-layer winding, the proposed winding (Fig. 1) has a significantly smaller ID (18.135 / 13.519 1.34 times) IDE (1.028 / 0.362 2.84 times).

The proposed winding is used in asynchronous single-machine frequency converters for which the stator has Z 36 slots. Such a converter contains on the stator two three-phase windings - motor with pole strength P, 1 and generator winding with pole strength p, 5, and on the rotor with slip rings - one

5149

phase winding combined type 2J. The application of the proposed winding allows to simplify the stator winding and reduce the insulation consumption, as well as reduce the EMF of the mutual induction of the winding from the floor with a polarity p 1, as a result of which copper losses of the winding are reduced and the energy indices of the machine are reduced.

Claims (1)

1. turns, and all other groups of tracks contain w turns, where k is O, 12, . . . , (1 2 -О. 15 G 1g Zr Зг Цг 5 g В g 7l 5g 5g South 11 g 2g J3r. JKI / J ll4 | / SL k l U & iU 7 l 5 7 5 ;; 13 15 J7 f32J gz 25 27 29 51. Phie. FIG. 2 ; r bg - FIG. five South 7 g  four r7-3 | g-rc l .