SU886144A1 - Three-phase single-phase combined winding of stator - Google Patents

Description

The invention relates to windings of alternating current machines and can be used, for example, in single-machine frequency converters and phase numbers. Electric combined windings are known, made in the form of parallel branches of the same polarity fx, each of which consists of spatially shifted coils and has the conclusions of the midpoints, which are the beginnings of the phases of the other polarity P2. The angle between the axes of the coils of the same branch is equal to the radian, and the number of turns in the coil is proportional to the angle of shift of the axis of the branch 1. The disadvantages of such windings are the complexity of the design and manufacturing technology, as well as the large losses from the balancing currents in branches x. Closest to the proposed is a three-phase-single-phase combined winding with the numbers of poles 2p 2 and 2p. 12, comprising 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 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 the seventh and eighth groups are connected to zero terminals, and the numbers of the phase groups alternate with an interval of four L2J groups. A disadvantage of the known construction is the limited scope. The purpose of the invention is to expand the field of application by obtaining chi. sat poles 2p. 2 and 2P2 16. This goal is achieved in that the winding contains 2C coil groups and in the first phase the first, third, fourth according to fourteen groups are connected in series for one branch, the second according to and thirteen, fifteen, sixteen, counter for

the branches, in the second phase of the ninth tenth group, twelve according to and twenty-third, opposite to one wind, and, eleven according to and twenty first, twenty-second, twenty-fourth, opposite to the other branch, in the third phase of the seventeen, twentieth according to and six, the seventh counter to one branch, eighteen, nineteen fifteen according to and fifth, the eighth counter to the other branch, with the beginning of the first and second, ninth and eleventh, seventeenth and eighteenth groups, respectively, of the beginning of the phases, and The ulevo conclusions are formed by the combination of the beginnings of groups, respectively, the fourteenth, twenty-third, eighth and sixteenth, twenty-fourth, and seventh.

FIG. 1 shows the winding, the scheme is deployed; in fig. 2 - star EMF coils for 2p 2-pole field; in fig. 3 - EMF diagram for 2p. 2 pole floor

Winding (Fig. 1) is made of single layer and contains 24 coils with numbers 1-24. The connections of the coils are made according to the scheme (the letters n and k at the coil number indicate the beginning and the end of the coil, respectively). The beginning of the phases are designated as C1, C2, C3, and the zero outputs - as 01, and 02:

1n 1k-3n Zk-4n 4k-14k 14n-01

01

2n 2k-13k 13n-15k 15n-1bk 1bn-02

9n 9k-10n 10k-12n 12k-23k 23n-01

C2 11n 11k-21k 21n-22k 22n-24k 24n-02

17n 17k-20n 20k-6k 6n-7k 7n-02

SZ 18n 18k-19n 19k-5k 5n-8k 8n-01

Coil pitch is equal to St TB

where 2. pole division 2p 1b-pole floor.

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 2-pole field at the 01 and 02 terminals does not produce EMF. The upper row of arrows (Fig. 1) shows the direction of the alternating current in the winding when it is powered through the C1, C2, NW terminals by a three-phase current (for the point in time when it has an amplitude value in phase 01), from which it is clear that 2p 2. Lower p The arrows show the direction of the direct current when the winding is powered through pins 01 and 02, whence it is seen that 2fi 16.

The proposed winding can be applied, for example, on the stator of asynchronous-synchronous frequency converters 50/400 Hz.

Claims (1)

Invention Formula The three-phase single-phase combined winding of the stator of electric machines of alternating current, for example, single-machine frequency converters and number of phases, is made of identical uniformly distributed coil groups and connected to two parallel branches with two insulated neutral terminals, which are 2 p2 -polar clamps, differing so that, in order to expand the field of application by obtaining the numbers of poles 2 in 2 and 2p2. 16, the winding contains 24 coil groups and in the first phase the first, third, fourth according to and fourteen groups are connected in succession to one branch, the second according to and thirteen, fifteen, sixteen are opposite to the other branch, in the second phase of the group ninth, tenth , twelve according to and twenty third for one network, eleven according to and twenty first, twenty second, twenty fourth for the other branch, in the third, it is the phase of the group of seventeen, twentieth according to and six, the seventh for one branch, eighteenth, nineteen thirteen according to and fifth, eighth counter to another branch, with the beginning of the first and second, ninth and eleventh, seventeenth and eighteenth groups respectively of the beginning of the phases, and these zero conclusions are formed by connecting the beginnings of the fourteenth groups respectively , twenty-third, eighth and sixteenth, twenty-fourth, seventh. Sources of information taken into account during the examination 1. USSR author's certificate N 24033, cl. H 02 K 3/00, 19732. USSR author's certificate tr 382198, cl. H 02 K 3/00, 1973. ZZ 23 25 VSS 7 8 9 10 If - fZP / 4 r l k A 75 V t G / / tf - / 7/7 VZ2 f 24 g. 2151 1516 P IB 1920 2 / 0 2 2A “r“ / e. 3