SU1494124A1 - 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 electric combined 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 3P ₂ = 15 distributed coil groups with concentric coils with group numbers 1 + 3K in the first phase , 2 + 3K in the second phase, 3 + 3K in the third phase, included in each phase sequentially according to, where K = 0, 1, 2, ..., (P ₂ -1 = 4). Each coil group contains two coils with steps along the grooves Y _N = 6 and 4 for groups of the third, eighth, thirteenth, and Y _N = 5 and 3 for the other groups. The angle of shift between the axes of the third, eighth, thirteenth, and two adjacent groups on either side of each of them is 2.5α, between the axes of the fifth and sixth, tenth and eleventh, fifth, and first 3α, and between mi of the remaining 2α groups, where α = 360 ° / Z = 10 °. Moreover, the sides of the inner coil for the second, fourth, seventh, ninth, twelfth, fourteenth groups are located in the slots single-layer with the number of turns 2W _K , and the sides of the remaining coils of all groups are double-layered with the number of turns W _K. 6 Il.

Description

(21) 4307375 / 24-07

(22) 09/18/87

(46) 07.15.89. Bul te 26 (75) V.I.Popov, S.V.Popov and Yu.N.Petrov

(53) 621.313.333.2.045.58 (088.8) (56) I.P. Kopylov and others. Designing electrical machines. Training allowance for universities. M .: Energie, 1980.

Popov V.I. Electric combined frequency converters. M .: Energie, 1980.

V.I. Popov, Matrix Analysis of Winding Circuits of Combined Electrical Machines. - Electricity, 1984, No. II, p. 36-43.

Livshits-iGarik M. Winding alternating current machines. Per. from English M.L.: GEY, 1959, p.

(54) THREE-PHASE WARMING OF ELECTRIC COMBINED MACHINE

(57) 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 an electric combined machine with the numbers of pole pairs of fields P, / P 1/5 is completed with polarity in the slots of the distributed coil groups with concentric coils with the numbers of groups 1 + ZK in the first phase, 2 + ZK in the second phase, 3 + ZK in the third the phases included in each phase are consistently according to, where, i, 2, ..., (). Each coil group contains two rolls with steps along slots 6 and 4 for groups of the third, eighth, thirteenth, and Y 5 and 3 for the remaining groups. The angle of shift between the axes of the third, eighth, thirteenth, and two adjacent groups on either side of each of them is 2.5 oi, between the axes of the fifth and sixth, tenth and eleventh, fifth, and first three ui, and between mi other groups 2o, Gleo. Moreover, the sides of the inner coil for the second, fourth, seventh, ninth, twelfth, fourteenth groups are located in the grooves single-layer with the number of turns 2W, and the sides of the remaining coils of all groups are double-layered with the number of turns W, (. 6 Il.

about fi

ate

The invention relates to coils of alternating-current AC electric machines with two opposite-pole magnetic fields in a common magnetic conductor and can be used, for example, in single-machine frequency and number of phase converters.

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

Figure 1 shows the scheme of the proposed winding; FIG. 2 shows the alternation of its phase zones for polarity. FIG. 3 is a shift diagram

the axes of the coil groups for polarity in FIG. 4 f are the EMF diagram induced in the phase (C1) groups by a field with polarity P, 1; figure 5 and 6 are polygons MDS winding figure 1 (Fig, 5) and the known two-layer winding (6).

The winding (figure 1) is made three-phase symmetric with pole position JQ

 in grooves with numbers from 1 to 36 from coil groups (with numbers from 1G to 15G) with concentric coils with steps along the grooves: 9Y 6 and 4 for groups SG, 8G, 13G; Yn, 5 5 and 3 - for all other groups. Phases contain groups: - 1G, 4G, 7G, SOUTH, 13G in the first phase, 2G, 5G, 8G,

11G, 14G in the second phase, SG, 6G,

9G, 12G, 15G in the third phase. In each phase of the group, the keys are consistently consistent and the beginning of the phases (from groups 1G, 2G, ZG) are designated as C1, C2, NW (in figure 1, the phases are connected into a star). The shear angles between the axes of the 25 groups are valid: for the groups SG, 8G, 1ZG, and two adjacent groups on either side of each of them is -oi 2.5 (figure 1); for groups 5G, and 6G, SOH and PG, 15G and 1G - for the other groups - 2oi, 30 where oi 360. The internal coil of 2G, 4G, 7G, 9G, 12G, 14G groups is located in its grooves in one layer, and the rest of the coils are all

groups - two-layer, and the number of turns of single-layer coils is 2W |, a double-layer - W ,.

The arrows in figure 1 show the directions of the three-phase current at

Research institutes winding through clips C1, C2, SZ

40

40

() and they correspond to the alternation of the phase zones, indicated in FIG. 2 as A-Z-B-X-C-Y.

The emf of coil groups is proportional to their shortening coefficients, ds of coils, and are equal: for pole position with pole division, 36/10 3,6- -8in (7-6 / 2 3,6) + sin (7 4/2 3,6) 0, 5010, 4848 - for groups ZG, 8G, 13G (Yn 06 and 4); sin (.5 / 2

3.6) + sin (7-3 / 2 3.6) 0.8192 + 0.9659 1.7851 for groups 1G, ZG, 6G, SOH, SG, 15G (and 3); 0.8192 + “2 0,., 7510 - for groups 2G, 4G, 7G, 9G, 12G, 14G (Yn 5 and 3); for sinCtT polarity. 6/36) + + sin (rr.4 / 36) 0.5010, 8420 - for groups ZG, 8G, 13G; sin (7-5 / 36) + + 8in () 0.4226 + 0.2588

Q

five

0 5 0

five

0

with

0.6814 - for groups 1G, 5G, 6G, SOH, PG, 15G; 0.4226 + 2 0, 9402 - for groups 2Г, 4Г, 7Г, 9Г, 12Г, 14Г. Using the shift diagram of the axes of the coil i groups for dl (fng.Z), we determine the phase emf and winding ratio: 4848 + + 22.751-cos 21.7851-cos I5 10.4145 and Кdб5 10Н1 5/12 0.8679. According to the diagram of FIG. 4, for the emf of the mutual induction of the phase (C1) from the floor with the polarity P 1 we define: 20.9402 X cos 35 - 2-0.6814 cos 75 - - 0.8420 0.346 0.

To assess the quality of the winding by the coefficient (S of the differential scattering characterizing the percentage of higher and lower harmonics in its MDS curve, MDS polygons were used (Figs. 5 and 6), which were constructed using an auxiliary triangular grid and its side taken 0.5 units; in the center of FIGS. 5 and 6, the currents of the phase zones are shown (see FIG. 2), and the digits of polygons are numbered from 1 to 36. According to FIG. 5 (for the winding of FIG. 1), we define: , 5 - the square of the average radius of the slot points of the polygon; radius is the circle ti for the main harmonic MDS is R z-Ko6 / Pi- H SUD (Ra / R) -0 P00 (4.5 / 3.95644-1), 74%. For the two-layer winding of the prototype with P, 5,,, K, 65 0.9416 in Fig. 6, the definition is: Rq 32/16; R (36 0.9416 / 5;;) 4.65691 and 14.525% bd; EMF of mutual induction of the phase from the field with P (1 , defined like the winding of FIG. 1, is iE, 0.596.

Thus, the proposed winding is much simpler structurally and technologically compared to the prototype winding, and also has a lower EMF value of AE (by 0.596 / / 0,, 72 times) and a smaller coefficient G), (by 14.525 / 13,, 06 times ).

The proposed winding is used on the stator of asynchronous single-machine frequency converters, the stator of which has 36 slots. Such a converter contains on the stator two separate three-phase windings - motor with pole and generator with pole, and on the rotor with slip rings - one phase winding of the combined type - Application of the proposed winding of 14G, 15G, characterized in that, in order to simplify and manufacturing as well as reducing losses in copper, each coil group contains two concentric coils with groove steps and 4

It reduces the losses in the copper winding and the EE due to the weakening of the EMF of mutual induction induced in the phases of the winding by the field from the combined magnetic conductor, which increases the energy performance of the machine.

“For groups ZG, 8G, 13G and and 3 for

Claims (1)

The claims of the remaining groups, initial sides The coils of groups 1G, 2G, ZG, 4G, 5G are arranged respectively in three-phase winding with electric measures 1 and 2, Zi4, 5 and 6, 8 and 9, the combined machine with the numbers of pairs of 10 and 11, the indicated laying repeats the points of the fields P, / R ,, 1/5, made in 15 s for groups 6G, 7G, 8G, 9G, SOUTH - thirty-six grooves with numbers ranging from offset of the slots by 12 numbers, and 1 to 36 out of fifteen reel for groups 11G, 12G 13G, 14G, 15G groups with numbers from 1 G to 15G, with the offset of the grooves by 24 numbers, pulling the coil groups with numbers than the internal coil of 2G groups, 4G, 20 7G, 9G, 12G, 14G contains 2 W turns, and all other coils of groups contain W, (turns, where, 1,2, ..., (P ,, -). 1 + 3K in the first phase, 2 + 3K in the second phase, 3 + 3K in the third phase, connected in each phase sequentially according to the conclusions of the phases from the beginning 15G 1G 2G ZG G 5G VG 7G 8G 9G YuG Sh sh Sh J J I I I / ", I, y 1 g, s at 1 5 7 9 11 13 15 rf 19 21 23 25 27 Z9 J / 33 35 FIG. 2 14G, 15G, characterized in that, in order to simplify {1 the design and manufacture, as well as reduce the loss in copper, each coil group contains two concentric coils with groove steps and 4 1 at n at BUT t IG Fig.Z f.JJ Editor O.Spesyvyh Compiled by A. Ketsaris Tehred L. Oliynyk Proofreader T. Kolb Order 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. D. 4/5 22 fS W 9 Signature