SU1254570A1 - Combined winding for electric machine - Google Patents

Abstract

The invention relates to electrical engineering, in particular to single-machine frequency and number of phase converters. The purpose of the invention is to expand the field of application by obtaining the number of pairs of poles p, / p 8/3. The winding is made single-layer in slots of twenty-four coils with a step along the slots У ЗТ, 9. The winding is connected into four parallel three-phase stars, the beginnings of which form clamps C, C, Cj for the polarity p 8, and the conclusions of their zero points form clamps A, B, C, D for the polarity of p 3. Phases contain coils with numbers 1,4,7,10,13,16,19,22 in phase Cf, 3,6,9,12,15,18 , 21.24 in the Cg phase, 5,8,11,14,17,20,23,2 in the C phase ,. In each star of the phases, two coils shifted by 37/4 radians are connected in series. The winding is equivalent to two independent windings: three-phase 2p, 16-pole and four-phase 2p2 6-pole. For each pole, the winding is symmetrical. 3 il. S (Lu Yu SP 4 SP h

Description

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The invention relates to coils of combined AC electric machines and can be used, for example, in single-machine frequency and phase converters, in contactless dual-power machines, and others.

The purpose of the invention is to expand the field of application by obtaining the number of pairs of poles.

Figure 1 shows the unfolded diagram of the proposed winding, figure 2 and 3 - diagrams of the EMF of the winding for polarity p ,.

The winding (figure 1) is made single-layer in slots of 24 coils (with numbers from 1 to 24) with a step along the grooves Y, S, 3-48 / 16 9. It is connected in parallel three-phase stars, the beginnings of which form three-phase clamps C, C C5 for polarity p, 8, and terminals from their zero points form additional four-phase clamps A, B, C, D for the best of p 3. Phases contain coils with numbers: 1 + Зк 1,4 , 7, 10,13,16,19,22 in phase C; 3 + GC 3,6,9,12,15,18,21,24 in phase 5 + GC 5,8,11,14,17,20,23,2 in phase C, where to 0,1,2, ... (p, -1 7) In each star of the phases, two coils shifted by radians are connected in series, and in the star phases C, C, C 5, respectively, the coils are numbered: 1 and 10, 9 and 18, 17 and 2 in the first, 19 and 4, Zi12, 11 and 20 in the second, 13 and 22, 21 and 6, 5 and 14 in the third; 7 and 16, 15 and 24, 23 and 8 in the fourth star. The top row of arrows in figure 1 shows the direction of the currents when powering the winding through terminals C, C with three-phase current (P (8), and the bottom row of arrows when powering the winding through additional terminals A, B, C, D four-phase current (). In the diagrams in Figures 2 and 3, the EMF vectors are assigned to coil numbers. From the EMF diagram in Figure 2, constructed for polarity, it can be seen that, at the terminals A, B, C, D, the field with this polarity does not induce EMF; from the EMF diagram of FIG. 3

2545702

for polarity, it can be seen that at the terminals C, C, Cj, a field with this pole position does not induce an emf. Thus, the winding in figure 1 is equivalent to 5 on two electromagnetically independent windings: three-phase 2p 16-pole and four-phase 2p 6-pole. For each pole, the winding is symmetric and has winding factors: for p, 8 - 1.0; for P2 3 -, 906.

In comparison with the known, the proposed winding has an extended scope, since it operates 15 with the numbers of pairs of poles of 8.3. It can be used, for example, on the stator of the combined non-contact dual-power machines, single-machine frequency converters and

- 20 number of phases and others.

Claims (1)

Invention Formula Combined electric winding with the numbers of pairs of poles p / p, 25 is made of spatially distributed coil groups and is connected in parallel four-phase parallel stars, the beginnings of which form three-phase clamps C, C, 30 Cj for the polarity p ,, the leads from their zero points form additional four-phase clamps for the polarity P2, and the phases contain coil groups with numbers 1 + 3k in 35 phase C, 3 + 3k in phase C, 5 -f-3k in phase C, characterized in: in order to expand the field of application by obtaining 8/3, the winding contains twenty four ten coil groups and in each branch each phase are connected in series — according to two shifted by 3 “U4 radians” coil groups, and in phases C, C, C, respectively, the coil groups with numbers 9 and 18, 17 and 2 in the first 19 and 4, 3 and 12, 11 and 20 are included in the second , 13 and 22, 21 and 6, 5 and 14 in the third, 7 and 16, 15 and 24, 23 and 8 in the fourth 50 stars with the coil step along the grooves equal to the morning pole division for polarity p, Where to 0,1,2, ..... (P, - 1). . and g "f 2 3 5 5 7 9 9 Yu It f2 13 If iS No. P 1B It 20 H 22 Phi. nineteen J3 at Cz FIG 2 Sz Iff Phie, 3