SU886145A1 - Three-phase / single-phase winding of combined electric machines - Google Patents

Description

I

The invention relates to the windings of electric machines of alternating current, for example, single-machine frequency converters and number of phases.

Known combined windings of electric machines of alternating current, made in the form of parallel branches of the same polarity PJ; each of which consists of spatially shifted coils and has the findings of the midpoints that are the beginning of the phases of the other polarity X. The angle between the axes of the coils of the same branch is rad, and the number of turns in the coil is proportional to the angle of shift of the axis axis ilj.

The disadvantages of such windings are the complexity of the design and manufacturing technology, the large losses from equal currents in the branches.

Closest to the proposed is a three-phase-single-phase combined winding with the numbers of the poles 2p 2 and 2p2 12, containing 12

coil groups connected in two parallel branches with zero leads, which are output terminals, in phases of which the beginnings of the first and second groups are input terminals, the end of the first group is connected to the end of the eighth, the end of the second to the end of the seventh, and the beginning of the seventh and eighth groups connected to zero terminals, with the numbers of the phase groups alternating with

to an interval of four groups of 2J.

A disadvantage of the known winding is the limited scope.

The purpose of the invention is the expansion of the field of application by obtaining the number of poles of 2p, and 2p 14 poles.

L

This goal is achieved in that the winding contains +2 coil groups and in one branch are connected in series the first, second,

20 twenty-fourth, twenty-fifth, according to thirty-thirty, thirty-fourth, thirty-third counter to the first phase, eighth, thirty thirty first, thirty second according to the forty first, forty, twenty first counter to the second, fifteen, sixteen, Seven eleven, thirty-nine according to and seventh, sixth, twenty-sixths are opposite for the third phase, and the numbers of the groups of the other branch of each phase alternate with an interval of twenty-one groups, and these zero conclusions are formed by connecting the beginnings of the groups corresponding to twenty-first, thirty-third, and twelve, twenty-sixth, forty-second, and the coil pitch is i pole division for 2p2 pole by

1n 1k-2n 2k-24n 2 + -25n 25k-35k 35n-3 to Zn-ZZk ZZn-01 22n 22k-23n 23k-3n Zk-4n 4k-Yn 1 to-13k 13n-12k 12n-02

8n 8k-30n 30k-31n 32k-41k 40n-21k 21n-01 29n 29k-9n 9k-10n 10k-Mon 11k-20k 20n-19k 42n-02

15n 15k-1bn 1bk-17n 17k-39n 39k-7k 7n-6k 6n-2bk 2bn-02 Zbn Zbk-37n 37k-38n Zvk-18n 18k-28k 28n-27k 27n-5k 5n-01 5. 4 In FIG. 1 shows the proposed winding with 2p 4 and 2p2 1 poles, the scheme is deployed; on srig. 2 stars EMF coil for 2p-pole field; in fig. 3 - EMF diagram of the coils. The winding (yig.) Is made of k2 identical coils with a pitch of 3, 3 ng 3- and connected according to a scheme (the letters n and k at the coil number indicate the beginning and end of the coil, respectively). The beginning of the phases are designated as C1, C2, C3, and zero pins 01 and 02

The upper row of arrows in FIG. Figure 1 shows the directions of the alternating current when powering the winding through pins 01, C2, C3, and three-phase current (for the time when the current in the C1 phase has the maximum value), from which it can be seen that 2 p k. The lower row of arrows shows the directions of direct current when powering the winding through pins 01 and 02, whence it is clear that 2P I.

According to the EMF star (Fig. 2), where the numbers of coils are assigned to the EMF vectors, the EMF diagram (Fig. 3) is constructed, from which it can be seen that the 2P-pole alternating field on the zero outputs 01 and 02 does not cause EMF.

Winding ratio of the winding for 2P. 4-pole floor 0.932.

The proposed winding can be applied, for example, on the stator of asynchronous-synchronous single-machine frequency converters.

Claims (1)

1. USSR author's certificate №, cl. N. 02 K 3/00, 19732. USSR Author's Certificate No. 382198, cl. H 02 K 3/00, 1973. ezittt3zittstsi7ittf3osi3gy3yi353s3i3f