SU1585868A1 - Electric machine three-phase - single-phase combined winding - Google Patents

Abstract

The invention relates to electrical engineering. The aim of the invention is to improve the electromagnetic parameters by increasing the winding coefficient for the polarity P 2 = 1 and reducing the loss in copper for the polarity P 1 = 6. The winding contains 18 evenly distributed coil groups numbered 1 to 18 and with a step of coils along the slots Y n = Τ 2 - Τ 1, where Τ 2 and Τ 1 are pole divisions for P 2 = 1 and P 1 = 6, respectively. In the first phase, groups with numbers 2, 3, -10 are included in series into the first star, groups with numbers -11, 1, -12 and the beginning of groups with numbers 1 and 3 are connected to the second star, where the minus sign in front of the group number means its counter inclusion in the star phase. For the other two phases, the numbers of the groups alternate with respect to the groups of the first phase at intervals of six groups for the second phase and twelve groups for the third phase. 3 il.

Description

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

The aim of the invention is to improve the electromagnetic parameters of the winding by increasing the winding coefficient for polarity p 1 and reducing copper losses for pole divisions for p

The winding (fig. 1) of 36 grooves of single-layer groups with numbers is united in two parallel stars with three-phase s from their beginnings for a field clamping the zero points of the stars P, 6. Coil pitch

18U p

/ L

p-g -I 36/2 18 and

i,

ty p 6.

FIG. 1 shows the scheme of the proposed winding; in fig. 2 shows the star and the EMF diagram of the winding groups for Pi 1, - in FIG. 3 - EMF diagrams of winding groups for p, 6.

 r-t-

in the first phase (C1) the groups included; 2, 3 ruy star - groups in the second phase (C2) the groups 8, the 9th star are included; the groups of divisions for p

The winding (Fig. 1) is made in Z. 36 single-layer slots of 18 coil groups with numbers from 1 to 18 and connected into two parallel three-phase stars with phase-locked clamps C1, C2, NW from their beginnings for polarity and additional clamps 01-02 from zero points of stars for polarity P, 6. The groove step of the coils is equal to

183 15 where i

Y p

/ L

p-g -I 36/2 18 and

i, 36/12 3 - poi p.

 6

 r-t- i. Mr. J t

in the first phase (C1) in the first, the star included groups, 2, 3, -10, and in the second star - groups - 11, 1, -12; in the second phase (C2), groups 8, 916 are included in the first star, and groups 17, 7, -18 are included in the second star; at

Ol 00

From the third phase (SZ), the first star includes the groups, 15, -, and the second star includes the groups - 5, 13, -6, where the minus sign means the group oncoming in the star of the phase. In each phase, the beginning of groups 1 and 3 , 7 and 9, 13 and 15s The upper row of arrows in FIG. 1 shows the direction of single-phase current when the winding is supplied through 01-02 (p, 6) and the lower row shows the direction of three-phase current when the winding is fed through C1, C2, NW ( p 1), FIG. 2 and 3 EMF vectors are assigned numbers of coil groups. In FIG. 2, the star emf is plotted by the EMF diagram of the winding for p 15, from which it can be seen that the field with p 1 does not induce an emf at terminals 01-02, and the winding coefficient | x1) is equal to KJJ-, 0.9271, FIG. 3 that the field with p 6 induces an emf at terminals 01-02, and groups 2 and 11, 8 and 17, 1 and 5 form three short-circuited circuits for this pole. If clamps 01-02 are supplied with direct current, then groups 2 and 11, 8 and 17s l and 5 do not flow around this current and the loss in copper for this circuit is reduced by 1/3,

When the proposed winding is performed in Z 5 slots, each coil group contains two coils with steps along slots 23 and 21 and with turn numbers 2W 1 to the winding coefficient K, 6, 0.9233,

The proposed winding can be used, for example, on the stator of a synchronous-asynchronous single-machine frequency converter of 60/50 Hz, the motor part of which with a pole p 6 is designed as an inverted synchronous machine and for this polarity the combined winding (Fig. 1) is used simultaneously in as starting winding (with shorted clips 01-02), field winding (when DC 01-02 is powered) and damper winding (short circuits

windings for p 6 in fig, 3),

Compared with the known winding, I have-, Shchey K, O (G, 0.895, we offer 0.9271 / 0.895

em dl

- 1,036 times higher winding ratio, and for p 6 - 1/3 lower losses in copper.

on

Claims (1)

Formula invented Electroma; busbar three-phase-single-phase combined winding with the numbers of pairs of poles, 1/6, made from uniformly displaced coil groups with concentric single-layer or one-two-layer coils and connected in two parallel three-phase stars with three-phase clamps from them for polarity P 1 and additional single-phase clamps from the zero points of the stars for polarity P 6, in particular, in order to improve the electromagnetic parameters by increasing the winding factor, for p. 1 and the reduction in copper losses for p 6, the winding contains 18 coil groups with numbers from 1 to 18, in each star the groups are connected in series and in the first phase, the first star includes groups 2, 3, -10, and the second star - groups - 1, 12, in the second phase, groups 8, 9, -16 are included in the first star, and groups -17, 7, -18 are included in the second star, groups 14, 15, -4 are included in the first star in the third phase and in the second star, groups -5, 13, -6, and in each phase the beginning of groups 1 and 3, 7, and 9.13 and 15 are connected together, and each coil group contains K-1 coils with average spacing along the grooves y - d - -j ,, where K is an integer, Z is the number of slots, 1 and lit. pole divisions for p 1 and p. 6, and the minus sign - before the number of the coil group means that it is turned on in the star of the phase. / 16 17 18 1 2 3 fy 5 6 7 a 9 10 11 12 13 14 or 02 FIG. 2 Phie.1