SU1495918A1 - 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 of the winding and manufacture, as well as reduce copper losses. The winding for the combined electric machine with the numbers of pole pairs of the fields P ₁ P ₂ = 1/5 is made with fully P ₂ = 5 in Z = 48 slots of 3 P ₂ = 15 coil first phase, 3 + 3 K in the second phase and 3 + 3 K 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 slots Y _n = 6 and 4 for the third, the fourth, eighth, ninth, thirteenth, fourteenth groups and Y _n = 5 and 3 for the other groups. The shift angle between the axes of the second and third, fourth and fifth, seventh and eighth, ninth and tenth, twelfth and thirteenth, fourteenth and fifteenth groups is equal to 3.5, and between the axes of the other groups - 3 Α, where Α = 360 ° / Z = 7.5 °. For all coil groups, the outer side is located in the grooves single-layer with the number of turns of 2 WK, and the sides of the inner coil are double-layered with the number of turns of WK. The grooves with numbers 11, 12, 27, 28, 43, 44 contain WK turns and are filled with a winding half. 7 il.

Description

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

The purpose of the invention is to simplify the design of the winding and its manufacture, as well as the loss of copper.

FIG. 1 shows the scheme of the proposed winding; Figures 2 and 3 alternate phase zones for the polarity Pg 5 of the proposed and known

- l f "

 . (1 | ((fiMOToK (() (I PBc fc PURELY; H; I (intr. -; i; ir-p iM -ta c / and p a nc ..: i I lixatn ripe / yiai neMoit CI di polarity p ,, 5; in fig „3 - diag) amma;) DC of the cutout phase of the phase (C1) of the proposed winding of the bottom pole - Youthfulness p, 1; on Lig. 6 and 7 - the polygons for the proposed and; windings correspond to ts tv it but ,,

I The winding (fig. 1) is made of symmetrical with phaxial | ip 5 pole in x 48 slots with numbers from I to 48 out of 3p 15 coil groups (with numbers from 1g to 15g) with coils | coicentric coils each: c luaraMH for the grooves in „6 and 4 for the jgroups Зг, 4г, 8г, 9г, 13г and 14г and | Ур1 5 and 3 for the other groups, Фа; сы contain groups: 1г, 4г, 7г, South n 13g in the first phase , 2g, 5g, 8g, 11g | and 14g in the second phase, Зг, 6г, 9г, И2г and 15г in the third phase, included-; the beginning of the phases are designated as | C1, C2, NW and in figo 1, the phases are connected to the star “the shift angle between the wasps: m of groups 2g and 3g, 4g and 5g, 7g and 8g, | 9g and South, 12g and 13g , 14g and 15g is equal, and between the axes of the remaining Irpynn is Zo, where cxL 360VZ 7.5. For all coil I pyiin, the outer coil with its sides is located in the grooves monolayer with the number of turns: 2W |, and the coil is internally two layers with the number of turns w, while the grooves with numbers 11, 12, 27, 28, 43, 44 contain w turns and are half-filled with a winding (in FIG. 2, these grooves are shaded). The arrows in Fig. 1 show the directions of the three-phase: the current when the winding is powered through the terminals 1-1 C1, C2, C3 (p 5) and they correspond to the alternation of the phase zones in Fig. 2, indicated by E (as in AZBXCY, the vector currents of the phase zones are depicted in the center of figs about 6 and 7 ,,

The emf of the coil groups is proportional to the shortening coefficients, the coils and are equal: for a pole p 5 with a pole division of 48/10 4,8- 2sin76 / 9,6) + sin (.4 / 9,6) 2,8137 for groups Зг , 4g, 8g, 9g, 13g and 14g (UE 6 and 4 at 2w (, and W (. Turns); 2siii (fr 5 / 9.6) + -, sin (7-3 / 9.6) 2, 8272 - dp of the other groups (Y -5 and 3 at 2W) and w, b, ptk; dp

91I

HK, Y1 (1 of p. - 1 - 2n, i n (m L / D8) + + to in (li 4/48) 1.0242 - for groups with 6 and 4: 2 1n (7G 5/481 t- ; n p ((Tk

 ; 3/48) 0.8380 - for ij.yrrn with y

  5 and 3.

According to the diagram of FIG. 4, for the polarity p 5, determine the VDS phase, the winding coefficient 11, the agent and the average

10 pitch of the coils in the grooves: Eg 22.8137x X (: -, s3.75 ° + (1 + 2 cos 7.5 °) 2.8272 14.0486; KO 14.0486 / 15 0.9366; Yn with (56 + З З + 6-4 + 42) / 15

 71/15 4,733 (45 slots filled 15 out of -48). According to the diagram of FIG. 5 determine the EMF of the phase induced mutually inductively by the field with pole strength p 1 - LE | 2-1.0242 X cos 71.25 ° + + 0.838 (1 -2cos 37.5 °) 0.167 O, i.e. 20 the winding has a mutual inductance connection with the field with a polarity of p 1

 the quality of the winding is carried out according to the coefficient of di-irrational scattering (T o C, which characterizes the percentage of higher and lower harmonic values in the MDS winding curve. The coefficient Gg is determined by the MDS polygon, the construction of which is used by the auxiliary triangular grid and its side taken to be 0.5 units (Fig. 6 and 7). Dp of the winding of the pre-specified (Fig. 1) according to Fig. 6 are determined 31: Rf

l j ff

 IZR 7.75 squared radius

the (middle) groove points of the polygon (i 1-48); R (Z KOB / P ,. M)

 (45-0.9366 / 57) 2 7.19935 - the square of the radius of the circle for the main harmonic MDS (z 45 is the number of grooves filled with the winding); Gg (Ra / R) 2-1.100: 7.649%. dL known winding 4, made a double-layer (Fig. 3), with P2. 5, Z 48, y 5,, Krb 0.9536 in FIG. 7 is determined: RJ 9.0; R (48-0.9536 / 5) 2 8 ° 49132 and C, 5.991%; Emf uE | such a winding, defined like the winding in figure 1, is equal to A E I 0,339 "

Thus, the assumed winding is much simpler structurally and in production than is known, it has a significantly lower emf HЕ (0.339 / 0.167 2.03 times) with a slightly larger value of coefficient

C, -, and only the best use of copper (in P, 93665 / 0.9536-4.733 1.04 times)

The proposed winding is used in asynchronous one-machine frequency converters, of which the stator has 48 slots. Such a converter has two separate three-phase windings on the stator - motor with pole power p, 1 and generator winding with pole power p 5, on the rotor with contact rings - one phase winding of the combined type. The use of the refined winding allows us to simplify the manufacture of the machine and improve the electromagnetic parameters (to reduce losses in the copper winding due to the reduction of the SDL from the floor with p 1, to increase the degree of use of copper). The proposed winding can also be used in other types of combined electrical machines.

Claims (1)

Invention Formula Three-phase winding for a combined electric machine with the numbers of pole pairs of fields. 1/5, made 86 Penn 48 pps. with Homers from 1 to 48 of 15 categories of groups with nom.- from g to 15g, containing coil groups with numbers 1 + 3k in the first phase, 2 + 3k in the second phase, 3 + 3k in the third phase, connected in each phase consistently with the conclusions of the phases of the Iachal groups 1g, 2g and 3g and ends of 13g, 14g and 15g, characterized in that, in order to study the structure and fabrication, as well as in the tenon of losses in the copper, each coil the group contains two concentrator coils with iiiararni in grooves 6 and 4 for the grg Zg, 4g, 8g, 9g, Pg and 14g and y, 5 and 3 for the other groups, starting the first side 1g-5g groups, respectively - in grooves with nomes and 1 and 2, 4 and 5, 7 and 8, 10 and 11, 14 and 15, this arrangement is repeated in groups 6g-10g with offset of the slots by 16 numbers, and for groups 11g-15g - with an offset of the grooves by 32 numbers, and in each coil group is biased and: the inner cores contain respectively 2w 1 and w turns, where k  0,1,2,. „., (City - Oo IP Zr Zg Tsg 5g Sr 7g 8-Zg South; // - JZg / Jr I4r 15g. .3; /, 1, °, 1, .5,1.3sb ,, D5y, Zo,;, Zs., 3.5 (, .. 5-wasps, at Sp., D5db, Dsg ,, (CjJyA Z9j XCj-iyAj- ZSf XC JAr ar Cr fr SrPxc j 1PG J LL / r ar Cr fr SrPxc Put. g , J / .1 .1. ЗХ Х, /. .-. i K 555 yj4f tZ 33 F & I.7