SU1631662A1 - Aligned electrical machine rotor winding - Google Patents

Abstract

The invention relates to electrical machine-building, namely, to the windings of electric alternating current combined machines, and can be used in single-machine frequency converters asynchronous-synchronous 60/100 Hz and asynchronous 60/150 Hz. The purpose of the invention is to expand the field of application, as well as to improve the electromagnetic parameters, by increasing the winding coefficient and reducing the differential spread for polarity p2. The combined electric rotor winding with the numbers of pole pairs pi / p2 is multi-phase short-circuited for polarity pi and three-phase for polarity O2, made of Zp2 coil groups and connected to a star with phase terminals on three contact rings. It contains 1 + 3k groups, 2 + 3k, 3 + 3k, respectively, in the first, second, third phases and in each phase of the beginning of the groups are connected to the phase clamp, and their ends are connected to the star's zero point, where O, 1, 2, 3, 4, New that the winding is made with the numbers of pairs of poles and in 45 slots 1H numbers from 15 to 45p of coil groups with numbers 1 to 15 and each coil group comprises two concentric coils with steps to Yn grooves 6, 4, and numbers of turns WK 2 WK respectively. The initial sides of the coils of group 1 are laid in the grooves 1p, 2p, and for each subsequent group, the indicated stacking in the grooves repeats with an offset of three grooves relative to the previous group. 7 il.

Description

The invention relates to windings of electrical alternating current machines with two equal-polarized magnetic 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 and decreasing the differential scatter for polarity P2.

FIG. 1 shows a diagram of the proposed winding; in fig. 2 and 3 show alternation of phase zones and polygonal MDS windings of FIG. 1 for polarity p2 5; in fig. 4 and 5 are the same, but for the known 2-layer winding; in fig. 6 and 7 - star and polygon EMF of the phase of the winding for the polarity pi 3 (Fig. 6) and p2 5 (Fig. 7).

The winding (Fig. 1) is made three-phase for p2 5 in 45 slots from 15 coil groups (x; numbers from 1 to 15) with two concentric coils each with steps along

grooves Up 6.4 and the number of turns WK, 2wK. It is connected into a star with the terminals of the terminals of the phases P1, P2, RH and zero point 0, it contains groups with the numbers 1 Sq, 2 + Sq, 3 + Sq in accordance with LS of the first, second and third phases, where x. 0, 1,2, 3, 4. In each phase, the beginning of the groups are connected to the phase clamp and their ends are connected to the zero point of the star. FIG. The 2-5 phase zones are marked as A – X, B – Y, CZ; in the numbering of the grooves, the letter n is the reference price and the MDS polygons are built (for one repeating part in 9 grooves) along a triangular grid and its side is taken as a unit of length . FIG. 6 and 7 EMF vectors are assigned numbers of coil groups. From the EMF diagrams of FIG. 6 and 7 that the field with a polarity pi 3 does not induce an emf on the .vid / -0 generator phase (FIG. 6), and pol0 with the P2 5 polkhnost does not cause a vocalization in the contours of the branches (. V) of the generator phase. The winding of FIG. for polarity and pi 3 has 5 phases with three lamb x (phi. b) and its winding coefficients are equal: Kobz 0.9452 for P2 5 and Kobz 0.8125 for pi 3 with an average coil pitch equal to Cp 14/3 .When performing a double-layer winding with q 45/15 3 (three coils in a group) and Pack 5 we get: К0б5 0.8312 and Кобз 0.8161.

For the MDS polygon, FIG. 3 for the winding of FIG. 1 are determined: Rq 23/3 - a quagfat of average radius of the slot points;

R2 - (45 0.9452) 5L2 7.33217 - the square of the radius of the circle for the main harmonic MDS; 0Д5 (Rq2) R2-1) 0.0456 is the differential scattering coefficient. For the 2-layer winding of FIG. 5: Rq2 6.0;

R2 (45 0.8312 / 5) 2 5.67017 and AD5 0.0582. Thus, in comparison with the known 2-layer winding, the proposed winding has an expanded scope, since it is performed with the numbers of pole pairs pi / p2 3 / 5 in 45 slots, simpler in design and in manufacture due to the smaller number of coils in the group, has improved electromagnetic parameters;

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a higher winding ratio K0b5 (0.9452- 0.8312 times) with a smaller step size of the coils along the grooves (in UE cf./op 15/14 times), a smaller coefficient cisnt (7d5 (in 0.0582 / 0.0456 1.28 times. It can be used on the rotor of single-machine frequency converters asynchronous-synchronous 60/100 Hz and asynchronous 60/150 Hz, performed in the design of serial asynchronous machines with a phase rotor with the number of rotor slots equal to 45. Its use simplifies the design and manufacturing of the rotor, reduces the consumption of copper and insulation on the rotor, reduces losses in copper and steel, increases efficiency and EC operational reliability of the combined electric machine.

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Claims (1)

The invention of the electromachine combined rotor winding with the numbers of pole pairs pi / p2, multiphase short-circuited for the pole polarity and three-phase for the polarity p2, made of Zp2 coil groups and connected to the star with the terminals of the phase terminals on three contact rings containing groups with numbers + 3k, 2 + 3k, 3 + 3k, respectively, in the first, second and third phases and in each phase of the beginning of the groups are connected to the Laz clamp, and their ends are connected to the zero point of the star, which differs from the fact that application as well as of electromagnetic parameters by increasing the winding coefficient and decreasing the differential dissipation for the polarity of p2, the winding is made with the numbers of pairs of poles pi 3 and p2 5 in 45 slots with numbers from 1 to 45 p out of 15 coil groups with numbers from 1 to 15 and each coil the group contains two concentric coils with steps along the grooves 6, 4 and WK, 2wK, respectively; the initial sides of the coils of group 1 are laid in the grooves 1p, 2p, and for each succeeding group, the stacking in the grooves repeats relative to the previous group, where k is 0, 1, 2, 3, 4, 75 1 2 3 7 J 5 Fi8.2 73 7 j 70 72 75 4e 13579 FIG A FIG. 6 Р7 01 / & 7