SU1494126A1 - Three-phase winding of combined electric machine - 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 density P ₂ = 5 in Z = 36 grooves from 3P ₂ = 15 coil groups with concentric coils, contains coil groups with numbers 1 + 3K the first phase, 2 + 3K in the second phase, 3 + 3K in the third phase, included in each phase sequentially-according, where K = 0, 1, 2, ..., (P ₂ -1 = 4). Each coil group contains two coils with steps along the grooves Y _N = 4 and 2 for the first, sixth, eleventh and Y _N = 5 and 3 groups for the other groups. The shift angle between the axes of the third and fourth, eighth and ninth, thirteenth and fourteenth groups is 3α, between the axes of the second and third, fourth and fifth, seventh and eighth, ninth and tenth, twelfth and thirteenth, fourteenth and thirteenth groups The fifteenth is 2α, and between the axes of the other groups is 2.5α, where α = 360 ° / Z = 10 °. The grooves with numbers 6, 7, 11, 12, 18, 19, 23, 24, 30, 31, 35, 36 are filled with a winding half. 6 Il.

Description

The invention relates to the windings of electric machines of alternating current with two polarized magnetic fields in a common magnetic circuit and can be used, for example, in single-machine frequency and number of phase converters.

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

Fig, 1 shows a diagram of the proposed winding; in fig. 2 - alternation of its phase zones; in fig. 3 is a diagram of the shift of the axes of its coil groups for the polarity P of FIG. 4 - diagram of the EMF of the coil phase groups (C1), induced by a field with a polarity of p.1; in fig. 5 and 6 - VAT polygons of the winding of FIG. 1 (FIG. 5) and the known two-layer winding (FIG. 6).

The winding (Fig. 1) is made symmetrical three-phase with polarity in the slots with numbers from 1 to 36

- 2.5 s, where numbers are 6.7,

 3.6 - sin (.4 / 2-3,6) + sin (ir-2 / 2x хЗ, 6) 0.9848 + 0.7660 1.7508 - dl, groups 1Г, 6Г, 11Г (and 2) ; sin (.3.6) + sin (M: .3 / 2. 3.6) 0.8192 + 0,, 7851 - for other groups (packs 5 and 3); for the p, l-sin () + sip (72/36) 0.3420 + 0.1737 0.5157 - for groups 1G, 6G, PG; sin (ir.5 / 36) + + sin (ir-3/36) 0.4226 + 0,, 6814 for other groups.

I

According to the diagram of FIG. 3 for the polarity of the Rl-5, we determine the EMF of the phase and the exact coefficient:, 7509 + + 2-1.6851 (cos5 + cosl5) 8.7560 and, 7560/10 0.8756 (30 windings out of 36 from the winding) . According to the diagram of FIG. 4 EMF of the phase from the floor with the p-1 polarity equal to, 6814 x X (00335 ° -cos75) -0, 248/0.

ten

from coil groups (with numbers from 1G to 15G) with concentric coils with LPAGs in grooves y, 4 and 2 for groups 1G, 6G, 11G and U, 5 and 3 for the remaining groups, the phases include the groups: 1G, 4G, 7G, YG, 1ZG in the first phase, 2G, 5G, 8G, 11G, 14G in the second phase, GH, 6G, 11G, 12G, 15G in the third phase. 3 each phase of the group are connected in series according to; in fig. 1 of the beginning of the phases is designated as C1, .C2, NW and the phases are connected into a star. The shift angle of the axial axis of the third and fourth, eighth and dev-j 15, thirteenth and fourteenth groups is equal to Goiter, between the axes of the second and third groups, fourth and fifth, seventh 11 and eighth, ninth and tenth, twelfth and thirteenth , the fourteenth and fifteenth - 2oii, and between the axes of the other groups 360 ° / z 10 °. Grooves with

11,12,18,19,23,24,30,31,35,36 filled with winding half (in Fig.2 these grooves are shaded). FIG. 1 (5oi / H arrows show the direction of the currents when powering the winding through the Zals C1, C2, NW three-phase current () and they correspond to alternating phase zones (Fig. 2), denoted as AZBXCY, phase vector current currents are shown in the center of Fig. 5 and 6.

The emf of the coil groups is proportional to the coefficients of the shortening of their coils and are equal: for polarity with pole division 36/10

20

thirty

25

40

45

35

50

55

ten

15

94126

The quality of the winding is estimated by the coefficient of the SGD characterizing the content of the highest and lowest harmonics in the MDS curve of the winding, Ratio (Od is determined by the multiple MDS, for which the auxiliary triangular grid and its side taken as 0.5 units are used. For the winding of Fig. 1 according to Fig. 5, we define: 19/6 - the square of the average radius

(i

-k 120

thirty

Slot points of the polygon 1-36); R (Z .Kos5 / P, T;) (30 x X 0.8756 / 5.1 |) 2.79650 is the square of the radius of the circle for the awesome harmonic MDS (is the number of filled slots out of 36); q C (Rg / R) -l7,100 13.237. Yap known two-layer winding of the prototype at, z 36, y, 0.9416 in FIG. 6 we define: Ra 32/6; R (36.0.9416 / 5 T) 2 4.65691 and b d 14.525%; EMF E,

25 of such a winding, defined like FIG. 1 is equal to DE, 0.596.

Thus, the proposed winding contains half the number of coil groups and is much simpler than the prototype winding, it has a significantly lower EMF LE, (by 0.596 / 0, 4 times) and a smaller value of coefficient SD (by 14.525 / / 13, , 1 time).

The proposed winding is used on the stator of asynchronous single-machine frequency converters having 36 slots on the stator. Such a converter contains on the stator two

40 three-phase separate windings - motor with a polarity of p 1 and the generator winding with a polarity of p.5, and on the rotor with slip rings - a phase winding of the combined type. The application of the proposed winding allows to simplify the construction and winding of the stator, as well as reduce losses in the copper winding due to a decrease in the EMF of mutual induction of the UE from the floor with polarity p 1, as a result of which the power indices of the machine increase. Such a winding can also be used in other types of combined electric machines.

35

50

55

Claims (1)

Formula invented and f Three-phase winding combined electric machine with the numbers of pairs. 514 the poles of the fields p, / p, 1/5, and a hollow in thirty six slots with noMepaNni from 1 to 36 out of fifteen coil groups with numbers from 1G to 15G, containing cylinders with numbers + 3k in the first phase, 2 + 3k in the second phase , 3 + 3k in the third one (Zazy, connected in the CChda phase sequentially according to the conclusions of the phases from the beginnings of groups 1G, 2G, ZG - the ends of the groups 13Г, 1АГ, 15Г, about , in order to simplify the design and manufacture, as well as reduce copper losses, each coil group; rder; whale two concentric carcasses with steps along the grooves yn and 2 for 1-rupp 1G, LH, 11G and y 5 and 3 for the other groups, the initial sides of the coils of groups 1G, 2G, ZG, 4G, 5G are laid in numbers 1 and 2, respectively, 3 and 4, 5 and 6, 8 p 9, 10 and 11, the indicated piling is repeated for the groups BG, 7G, 8G, 9G, JH With the offset of the slots by 12 numbers, l jviH of 11G, 12G, 13G, 4G, 5G groups - with the offset of the slots by 24 numbers, all coils containing the same number of turns, where k  0, T, 2, ..., (). 15G / G 2G ZG “G 5G VG 7G 8G 9G SOUTH IG 12G Sh sh X,  IV "L" - t 1 - 1-4 M "- 1 3 5 1 9 11 13 15 17 19 21 23 25 27 29 3/53 J    Рйй р f ip f f  y gx1 x ymz x y z x F1 / e.2 Fig.Z SOUTH sis 18, " Tf 29 23 FIG 5 Compiled by A. Ketsaris Editor O.Spesyvykh Tehred L.Oliinyzh 34kaz 4123/51 Circulation 646 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and Publishing Combine Patent, Uzhgorod, st. Gagarin, 101 27 3fy 26 N 15 Phage. 6 Proofreader T. Kolb Subscription