SU1631663A1 - Aligned electrical machine rotor winding - Google Patents

Abstract

The invention relates to electrical engineering. The purpose of the invention is to expand the field of application, as well as improve the electromagnetic parameters by increasing the winding coefficient for polarity pi. The winding with the numbers of pole pairs pi / pa is multi-phase short-circuited for polarity pi and three-phase for polarity p2 3. It is made in 45 slots with numbers from 1 to 45, and from 6p2 18 coil groups with numbers from 1 to 18 and connected in a star with conclusions of clips of phases on three contact rings. Contains groups with numbers 1 + 3k, 3 + 3k, 5 + 3k respectively in the first, second, third phases and in each phase of the beginning of the odd groups are connected together, and the beginnings of even groups are connected to the zero point of the star, where 0, 1, 2 () The winding is made with pi 5 and each coil group contains two concentric coils with groove steps and numbers of turns equal to Pack 7, 5 and 2 WK, WK, for odd groups: UE 6.4 and WK, WK, for even groups . The initial sides of the coils of groups 1 and 2 are laid in the grooves 1p, 2p, and 4p, 5p, and for each subsequent pair of groups, the indicated arrangement in the grooves repeats five offset slots with respect to the previous pair of groups. 6 Il.

Description

The invention relates to windings of electrical alternating current machines with two opposite-pole fields in a magnetic circuit and can be used in single-machine frequency and phase converters.

The purpose of the invention is to expand the field of application, as well as improve the electromagnetic parameters by increasing the winding coefficient for polarity P1.

FIG. 1 shows a diagram of the proposed winding; in fig. 2 - alternation

phase zones for the polarity P2 3 of the winding of FIG. one; in fig. 3-polygon MDSp of p2 3 pole positions: in FIG. 4 - alternation of phase zones for the polarity of р2 3 known two-layer winding; in fig. 5 and 6 - stars and diagrams of the EMF of the phase of the winding for the polarity pi - 5 (Fig. 5) and P2 3 (Fig. 6)

The winding (fig. 1) is made three-phase for p2 3 polarity in 45 grooves from 6p2 18 coil groups (with numbers from 1 to 18) with two concentric coils each with steps along grooves and numbers of turns equal to: Pack 7, 5 and 2wK, WK for odd groups; Ou 6, 4 and WK, WK for even groups. Phases contain groups with numbers 1 - Зк,

ABOUT

s

EC

Och sa

3 + Зк, 5 + Зк respectively in the first, second, third phases and connected to the star with the terminals of the terminals P1, P2, RH and the zero point 0, where 0,1, 2 .., (2p2-1 5). In each phase, the beginnings of odd groups are connected to a phase clamp, the ends of odd and even groups are connected together, and the beginnings of even groups are connected to the star's zero point. FIG. 2-4 phase zones are designated as A – X, B – V, C – Z, in the numbering of the grooves the letter оп is omitted and the MDS polygon is built on a triangular grid with a side equal to the unit length. FIG. 5 and b to the EMF vectors are assigned numbers of coil groups. From the EMF diagrams of FIG. 5 and 6, it can be seen that the field with a pole of pi 5 does not induce an emf at terminals P1-0 of the generator phase (Fig. 5), and a field with a pole of P2 3 does not cause equalizing currents in the contours of the branches of the generator phase (Fig. 6) FIG. 1 for pi 5 has a number of phases for 9, and its winding coefficients are: Kobz 0.9099 (for p2 3) and K065 0.8242 (length pi 5) with an average step of coils along the slots of Cp 5.8. When performing a double-layer winding with q 45/18 2.5 (three and two coils in groups) and Up 6 its winding coefficients are equal: K0ez 0.9099 and K0b5 0.7641. On the MDS polygon (Fig. 3) for

The windings of FIG. 1 are determined: Rq 19.2; R2 (45-0.9099 / 3 -Jr) 2 18.87427 and adz (Rq2 / R2-1) 100 1.726%, where Rq2; R2 and Od3 are, respectively, the squares of the average radius of the slot points of the polygon and the radius of the circle for the main harmonic MDS, the differential scattering coefficient for p2 3. For the 2-layer winding of FIG. 4, the MDS polygon has the form of FIG. 3, and the stds coefficient has the same value. Thus, in comparison with the known 2-layer winding, the proposed winding has an extended range of application, as it is performed with pi / p2 5/3, it is simpler in design and production because of the smaller number of coils in groups. improved electromagnetic waves

0 5 0 5

0

five

0

five

Parameters: a higher value of K0b5 (0.8242 / 0.7641 1.1 times) with a smaller coil pitch (6 / 5.8 times). It can be applied on an asynchronous single-rotor; 60/100 Hz machine frequency converters, made in the design of serial asynchronous machines with a phase rotor. Its use allows us to simplify the rotor design and reduce copper consumption and insulation for it, reduce copper losses, increase efficiency and operational reliability of the combined electric machine.

Claims (1)

Claims of the invention Combined rotor winding with the numbers of pole pairs pi / pa, multi-phase short-circuited for polarity pi and three-phase for polarity pa 3, made in 45 slots with numbers from 1p to 45p from 6p2 18 coil groups from 1 to 18 and connected a star with phase terminals on three contact rings containing groups with numbers 1 + + 3к, 3 + Зк, 5 + Зк respectively in the first, second and third phases, and in each phase the beginning of the odd groups are connected to the phase clamp, the ends of the odd and even groups are connected together, and the beginning even groups are connected to the star's zero point, characterized in that, in order to expand the field of application, as well as improve the electromagnetic parameters by increasing the winding coefficient for polarity pi, the winding is made with pi 5 and each coil group contains two concentric coils with groove steps and the number of turns equal to Opt 7, 5 and 2wK, WK for odd groups Opt 6, 4 and WK, WK for even groups, with the initial sides of the coils of groups 1 and 2 laid in the grooves 1p, 2p and 4p, 5p, respectively, and for each pursuing pair of groups is indicated laying in the slots is repeated with an offset of five grooves with respect to the previous pair groups, where k is O, 1, 2 ... (2r2-1). Р2РЗ . Phil 75 16 17 A- Z-Ifljj-JcJ / 7 J 5 7 9 77 13 75 2 1 3 5 7 9 11 13 15 FIG. U 17 FIG. five YU np b th 6 G8 V4 ; 757Л 75 7 16 Editor M.Kelemes Compiled by A. Ketsaris Tehred M.MorgentalKorrektor S.Cherni Fig.Z YU np 7 13 g ъ 6 G8 V4 P1 Thebes. 6