SU1495910A1 - Three-phase-one-phase armature combined winding - Google Patents

Abstract

The invention relates to electrical engineering. The purpose of the invention is to expand the field of application by performing in 57 slots, improving parameters by increasing the winding coefficients. The winding is made of twelve distributed coil groups with double-layer concentric coils and is connected in three parallel three-phase stars with three-phase clamps for polarity P ₁ = 2 and additional single-phase clamps for polarity P ₂ = 6 from the zero points of the stars. The first phase contains the first, fourth, seventh, tenth coil groups. Their coils are connected in series to the branches of stars and an additional branch, the beginning of which forms a phase clamp, and its end is connected to the beginnings of the branches of the stars of the phase, and the coils of even coil groups are included in the branches x relatively odd. For the other two phases, the numbers of coil groups alternate with respect to the first phase at intervals of four and eight groups. The second, sixth, tenth of the coil groups contain from four coils with steps along the grooves Y _n I = 14-2 (I-1) and the other coil group - by five coils Y ₁ pc = 15-2 (K-1 ), where I = 1-4 and K = 1-5 are the numbers of coils in the coil groups. In the branches of each phase, for its coil groups, the coils with the numbers k = 1 are included in the branch of the first star, K = 5 and I = 4 in the branch of the second star, I = 1, 2, 3 in the branch of the third star, K = 2 , 3, 4 - in the additional branch. Additional terminals for polarity P _{2 are} made from the zero points of the first and second stars, and the zero point of the third star forms an additional zero terminal of the winding. 5 il. 1 tab.

Description

The invention relates to the core windings of electrical alternating current machines with two opposite pole magnetic fields in a common magnetic core and can be used, for example, in synchronous machines with

excitation system from the third harmonic magnetic field, in single-machine frequency and phase converters, etc.

The purpose of the invention is to expand the scope and functional

3149

capabilities by performing in 57 slots, as well as improved parameters; by increasing the winding coefficients.

I FIG. 1 shows the scheme of the proposed: winding; in fig. 2 - simplified wiring diagram of its phase C1; in fig. 3 and 4 - axis shift diagrams; coil groups for pole positions: and p 6, respectively; in fig. 5 - I polygon. AC winding for pole I p 2.

The winding (fig. 1) is made double-layered in 57 slots with numbers from 1 i to 57 of 12 coil groups (with no. Measures from 1G to 12G) with concentric coils with steps along the slots Yn, U-2 (i-1) 14, 12, 10, 8 for groups 2G, BG, YG and. „15-2 (k-1) 15, 13, 11, 9, 7 for the other groups, where k 1-5, and i 1-4 - numbers of coils in groups. It is connected in three parallel three-phase stars with three-phase clips C1,

C2, Sz for p 2, additional single-phase terminals 01-02 for p2 6 and an additional zero terminal O for connection to the phase voltage of a single-phase generator load. The first phase contains groups 1G, 4F, 7G, and SOH and their coils are connected in series in the star branches

; .

; And B additional branch, the beginning of the ko; the torus forms the phase clamp and its end is connected to the beginnings of the branches; phase stars (Fig. 2): coils with numbers k 1 - in the branch of the first star, branch of the second star, i 1, 2, 3 - in the branch of the third star, k 2, 3, 4 - in the additional branch, and coils of even groups are included in branches x oppositely odd. For the two other phases, the numbers: groups alternate with respect to the first phase at intervals of four and eight groups. Clips 01-02 are filled from the zero points of the first and second stars, and the clip O is from the zero point of the third star. FIG. 1 the upper row of lines, the lock shows the directions of the three-phase current when feeding the winding through C1, C2, NW (p, 2), and the lower row shows the directions of the single-phase current when feeding the winding through 01-02 (p 6). The axes of adjacent coil groups are shifted by angles (in electrical degrees): 60 ± o for p 2 (Fig. 3; o (15 / 4.75) and

| Q

20 25

zo

d 0 5

five

five

180 + 3 ° for P2 6 (FIG. 4), where 57/12 4.75 is the number of slots per pole. and phase. The EMF of the coil groups form a three-phase symmetric system, for p 2 and a single-phase system with three branches for p 6. The EMF of the coils is proportional to their coefficients for shortening Q2 sin (G. Yn / 14.25) and K for sin (FYp (4.75) where 57/4 is 14.25 and 57/12 4-75 are pole divisions. The data are shown in the table.

The emf of the branches of the phase (Fig. 2 and 3) for p., 2 are equal: the branches of C1-01 - 0.9966d (1 + 2coscO, 2.9868 W ,,, the branches of C1 -02, 6973- (U2cos ") ( - 0,7719 Wt 2,8617 W, branches С1-0 - (0,9996 + + 0,9694 + 0,8923) W 2,8613 W, that is, they are almost the same and their average value is 2, 9033-Wj; branches C1-C1 - (0.9905 + 0.9365 + + 0.8372) - (NSCosoOS W and 8.2842. Phase EMF is equal to (8.2842-s + 2.9033) Wj with the number of turns to a phase equal to (9 "с + Ю / 3) at с 1.0, one gets an emf of phase equal to 11.1875 W, and a winding coefficient KO is 11.1875 / / (37/3) 0.9071. For the emf of phase in - / 3 times less get (8,2842 with + + 2,9033) 11,1875 / V3, whence we find with 0,43 and Kj, 5-j 0,8976; with with 1/3 receive K, 0.8944.

For circuit 01-02 with a P2 -6 polarity, the emf is (0.9694 + 0.7357) X (H-2cos 3 f) +0 ,, 5.5447-W with the number of turns of the circuit 01-02 equal to 7W; jj- and then the winding ratio is Ko4-, 5.5447 / 7 0.7921.

When the coefficient changes from the cross section of the wire of the coils of the additional branches of the phases, it should be inversely proportional to the coefficient c. In this case, the parameters of the circuit 01-02 for p 6 do not change.

Thus, the proposed winding has electromagnetically independent opposite-pole clamps (after with p., 2 does not induce an emf at clamps 01-02, and a field with p, j 6 does not induce an emf at linear clamps C1, C2, NW), you- 57 slots and allows connection to the phase voltage (terminal O and one of the terminals C1, C2, Sz) single-phase generator load, and can also be performed on various three-phase voltage with constant parameters for p, 6. Compared with a winding for which Kof 0.90 and

one

Kpg- 0.706, the proposed winding has higher winding ratios.

FIG. 5, a polygon is made for the t-SCH winding (with c 1/3) for p 2 where the slot points are numbered from 1 to 57, and for the constructions an auxiliary triangular grid is used, the side of which represents the current vector of the phase zone of one layer of the slot (phase zones are denoted as AZBXCY and their vectors are shown in the center (Fig. 5) and taken per unit length. From Fig. 5, by the Cosine theorem, the square of the average radius of the slot points is 3780/57. The square of the radius of the circle corresponding to the main harmonic MDS with the winding coefficient Kgj- 0.8944 is equal to R

- (- 0.8944) 2 65.834503 and then

the coefficient of differential dispersion characterizing the percentage content of the highest and the lowest harmonic winding in the VAT curve is equal to

(1) .100 0.7311%, which is significantly less than for winding with 39 slots.

The proposed winding can be applied on the core of synchronous machines of the OS series with the excitation system from the third harmonic magnetic field and replaces the two-part windings of the core of a serial machine: a three-phase main with p 2 and an additional single-phase with p 6, connection

Claims (1)

readable through the excitation control unit with valves to the excitation winding of the rotor (the pole-pole rotor has a damper winding on the pole pieces). The use of such a combined winding simplifies the design and manufacture of the machine, reduces the consumption of copper and insulation on the cortex. The invention of the three-phase single-phase root combined winding, for example, for blue . d 5 0 five about five 0 five 0 106 a crown machine with an excitation system from a third GPCrmonic magnetic field, made up of twelve coil groups with numbers from 1G to 12G, consisting of concentric coils connected in parallel three-phase stars and three additional branches, with the end of each additional branch connected to the junction of the same phases stars, the conclusions are made from the zero points of the stars and the beginnings of additional branches, with the coils of even groups included in the branches x counter to the coils of odd groups, and the numbers of the groups of phases of black and duyuts groups relative to the first phase at intervals of four groups for a second phase and in eight groups for Phase three, excellent - with. By the fact that, in order to expand the field of application by performing in 57 slots, as well as to improve the electromagnetic parameters by increasing the winding coefficients, the coil groups numbered 2Г, бГ, and ЮГ are made of four concentric coils in steps of Y 14-2 (1-1 ), the remaining coil groups are made of five concentric coils with steps along Y 15-2 (k-1) grooves, the coil groups are stacked in 57 slots with numbers from 1 to 57, and the beginning of the coil groups from 1G to 12G are laid in the grooves 1, 6, 10, 15, 20, 25, 29, 34, 39, 44, 48, 53, respectively, in the first phase of the first the stars include the first coils of coil groups 1G, 4G, 7G, and SOH, the fourth coils of the same star coils and the fifth coil of the SOUTH group are included in the second star, the first and third stars of the SOUTH coil group are in the first phase of the third star, the first additional branch included the remaining coils of coil groups 1G, 4G, 7G, SOUTH, where i 1, 2, 3, 4, k 1, 2, 3, 4, 5 are the numbers of coils. nr ir yy fir yugshg "DG 11 §r 4