SU886147A1 - Three-phase / single-phase winding of electric machines - Google Patents

Description

(54) THREE-PHASE-SINGLE-PHASE COMBINED ELECTRIC MACHINE WINDING

I

The invention relates to windings of electrical machines of alternating current, for example, about; .1ch.1 machine frequency converters and number of phases.

Combined windings of alternating current electric machines are known, made in the form of parallel branches of one polarity p, each of which consists of spatially shifted coils and has findings of middle points that are the beginning of the phases of the other pole polarity pg. The angle between the axes of the coils of one and the other the same branch is glad, and the number of turns in the coil is proportional to the angle of shift of the axis of branch 1.

The disadvantages of such windings are the complexity of the design and technology of rigging, the large losses from the balancing currents in the branches x.

Closest to the proposed is a three-phase-single-phase combined winding with pole numbers 2p). 2 and 2p - 12, containing 12 coil groups included 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

clamps, the end of the first group is connected with the end of the eighth, the end of the second with the end of the seventh, and the beginning of the seventh and eighth groups are connected to the zero terminals, and the numbers of the phase groups alternate with an interval of four groups 2.

5 A disadvantage of the known winding is the limited scope.

The goal of saving is to expand the field of application by obtaining the numbers of the poles 2p, 8 and 2i) 2 14.

This goal is achieved by the fact that the winding contains 42 coil groups and in one branch are connected in series to the first, second, thirteen, thirty-third according to and eighteen, seventeen, twenty-eight for

j of the first phase, the eighth, the ninth, the virgin of the thirteenth, the twentieth according to and twenty-four, thirty-fifth, the fourth, counter to the second phase, fifteen, twenty-six, twenty-seventh, thirty-seven according to and forty second, eleven,

20 tenths 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

the combination of the beginnings of the groups of the fourth, tenth, twenty-eighth and seventh, twenty-fifth, and thirty-first, respectively, and the step of the coils is equal to the pole division of the 2pi-pole field.

Claims (2)

FIG. 1 shows the proposed winding, the scheme is developed, with 2p) 8 and 2pi 14 poles; in fig. 2 - star 1n 1k-2n2k-13n 13k-33n33 22n 22k-23n 23k-34n 34k-1 8n8k-9n 9k-18n 19k-20n 2 29n 29k-30n 30k-40n 40k-4 15n-15k-26n26k-27n27k-3 Zn 36k-5n 5k-6n 6k-16n 16 The upper row of arrows in FIG. 1 shows the directions of the alternating current when powering the winding through the terminals C1, C2, Sz and three-phase current (for the point in time when the current in the phase C1 has the maximum value), from which it is clear that 2p | 8. The bottom row of arrows shows the directions of direct current when powering the winding through pins 01 and 02, whence it is clear that 2p 14. By the EMF stars (Fig. 2), where the EMF vectors are assigned coil numbers, the EMF diagram is plotted (Fig. 3 ), whence it is seen that 2p (8-pole field on the zero terminals 01 and 02 does not produce an emf. The proposed winding can be applied, for example, on the stator of asynchronous-synchronous single-machine frequency converters. Formula of the Invention Three-phase-single-phase alternating winding of AC electric machines eg single machine x frequency converters and number of phases, made of uniformly distributed coil groups and connected in two parallel branches with two zero leads, being clips of a 2p2 pole circuit, from EMF coils for a 2pi 8-pole field; Fig. 3 - a diagram of EMF coils. The winding (Fig. 1) is made of 42 identical coils with a step Y 3 and connected according to the scheme (the letters "n and." To - respectively the beginning and end of the coil). The beginnings of the phases are designated as C1, C2, NW, and zero outputs are 01 and 02. 18n-17k 17n-28k 28n-01 to-39l 39n-38k 38n-7k 7n-02 to 24i-35k 35n-4k4n-01. K-3K Zn-14k 14n-25k 25n-02 K-42k 42n-11k Mn-Lok 10n-01 21n-32k 32n-31k 31n-02 It is in order to expand the field of application by obtaining the numbers of poles 2pi 8 and 2pi 14, the winding contains forty-two coil groups and in one branch are connected in series the first, second, thirteen, thirty-third according to and eighteen, seventeen, twenty-eighth opposite for the first phase, eighth, ninth, nineteen, twentieth according to and twenty Fourth, thirty-fifth, Fourth counter to the second phase, F-fifteen, twenty-sixths, twenty s dьma, thirty-seven according to and forty-second, eleven, ten-one is opposite for the third phase, and the group numbers of the other branch of each phase are alternated with an interval of twenty-one groups, and these zero conclusions are formed by connecting the beginning of the groups of the fourth, tenth, twenty-eighth and seventh, twenty-fifth, thirty-first, and the step of the coils is equal to the pole division of the 2p2-pole field. Sources of information taken into account in the examination 1. USSR author's certificate number 243033, cl. H 02 K 3/00, 1973. 2. USSR author's certificate number 382198, cl. H 02 K 3/00, 1973. Cv CM v five -e37 2738 28 26 1 39 / xV C ,, 35.- 3 iV / ,; 3V / 5 // I 2 t gz 2 f 2 33 2 32 FIG. 2 4.y-7-f r | 5 FIG. 5 5 Sz