SU1224906A1 - Combined stator winding - Google Patents

Abstract

The invention relates to windings (BOS) of electric machines of alternating current and can be used in combined electric machines. The purpose of the invention is to expand the field of application by obtaining the number of pairs of poles P: / P2 9/8. Both are made of twenty seven spatially displaced coil groups (CG) and are connected in three parallel three-phase stars, the beginnings of which form clamps for PI pole, and the outputs from their zero points form clamps for pole P2. In the first phase, CG with numbers 16, 22, 25 are included in the first star, 1, 13, 19 - in the second, 4, 7, 10 - in the third, in the second phase, CG 2, 5, 26 are included in the first star, 8, And, 23 - in the second, 14, 17, 20 - in the third, and in the third phase included KG 9, 12, 18 in the first star, 6, 15, 21 - in the second star, 3, 24, 27 - in the third star , moreover, these additional clamps are made from the zero points of the first and third stars, and the coil pitch is equal to pole division for polarity P |. A magnetic field with a pole at the zero points of the stars does not induce an emf, therefore, OT can simultaneously be used to create a rotating MDS P, 9 and a constant MDS P2. 8. 2 Il. (LY 1CHE 4 SO O Oh :)

Description

The invention relates to the windings of electric machines of alternating current and can be used in combined electric machines, for example in single-machine converters of frequency and number of phases, in motors with a rolling rotor, etc.

The purpose of the invention is to expand the field of application by obtaining the number of pairs of poles 9/8.

FIG. 1 shows a diagram of the proposed winding; in fig. 2 is its EMF diagram for pole position.

The winding is made in 54 slots (Fig. 1) single-layer of 27 coils (with numbers 1 - 27) with a Wu 3 pitch equal to pole division (in the grooves) for polarity Pj 9. It is connected into three parallel three-phase stars (Fig. 2) the beginnings of which form three-phase clips C1, C2, C3 for polarity, and the leads from their zero points 01, 0, 02 form two additional clips 01-02 for the polarity P, 8, and the clips 01 and 02 are formed by the zero points of the first and third stars. In the star phases, the coils are connected in series in accordance with: in the C1 phase, coils with numbers 16, 22, 25 are included in the first star, 1, 13, 19 - in the second star, 4, 7, 10 - in the third star; in phase C2, coils 2, 5, 26 are included in the first star, 8, 11, 23 - in the second star, 14, 17, 20 - in the third star; in the NW phase, coils 9, 12, 18 are included in the first star, 6, 15, 21 - in the second star, 3, 24, 27 - in the third star. The arrows in FIG. Figure 1 shows the directions of the currents when powering the winding through clips C1, C2, NW by three-phase current (upper row of arrows. P, 9) and when powering clips 01 and 02 by direct current (lower row of arrows.).

On the EMF diagram (Fig. 2), the coil numbers are assigned to the EMF vectors, from which it can be seen that the field with pole positions at the zero points of the stars does not induce an EMF, the trace

five

0

0

As such, the winding can simultaneously be used to create a rotating MDS s and a constant MDS s.

When the winding is powered through the clips 01 - 02 by the direct current of the coil of the second star of the phases, this current is not flowed around. This circumstance contributes to an improvement in the parameters of the winding for polarity RD: the losses in copper are reduced by 1/3, the shape of the MDS curve is improved.

Thus, the proposed winding, in comparison with the known one, having Pi / P2 9/3, has an extended scope. Its winding coefficient for poles is, 0.

Claims (1)

Invention Formula The combined stator winding with the numbers of pole pairs Pi / Pa, made of twenty-seven spatially displaced coil groups and connected into three parallel three-phase stars, the beginnings of which form three-phase clamps for polarity PI, and the outputs from their zero points form two additional clamps for polarity Pa, in the phase stars, the coil groups are connected in series according to, characterized in that, in order to expand the range of assignment by obtaining Pi / P2 9/8, in the first phase the coil groups numbered 16, 22, 25 are included in the first the first star, 1, 13, 19 - in the second star, 4.7, 10 - in the third star, in the second phase, groups 2, 5, 26 are included in the first star, 8.11, 23 - in the second star, 14, 17 , 20 - in the third star, in the third phase, groups 9, 12, 18 are included in the first star, 6, 15, 21 - in the second star, 3, 24, 27 - in the third star, with additional clamps made from the first zero points and the third star, and the coil pitch is equal to the pole division for polarity Рь fie.g Compiled by A. Ketsaris Editor N. Gorvattehred I. VeresKorrektor A. Zimokosov Order 1918 / 53Tnrazh 631Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab. 4/5 Branch PPP "Patent, Uzhgorod, st. Project, 4