SU1631664A1 - Single-double layer aligned 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 coefficients and reducing the differential scatter for polarity. The single-double-layer combined winding of the rotor with the numbers of pole pairs pi / p2, multi-phase short-circuited for pi polarity and three-phase polar polarity is made of Zp2 coil groups and connected to the star with the terminals of the phase clamps on three contact rings. Contains groups with numbers 1 + Zk, 2 + Zk, Zg + Zk respectively in the first, second, third phases and in each phase of the beginning of the groups are connected to a phase clamp, and their ends are connected to the zero point of the star, where O, 1, 2 3, 4.0 The winding is made with the numbers of pairs of poles pi 2 and P2 5 in 75 slots with numbers from 1 to 15 and each coil group contains three concentric coils with steps along the grooves Packs 24, 22, 20 and the number of turns 2wK, 2wtc, WK . The initial sides of the coils of group 1 are laid in the grooves 1, 2p, 3p, and for each subsequent group, the indicated stacking in the grooves repeats five shifts relative to the previous group. 7 il. WITH S

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, simplify the design, as well as improve the electromagnetic parameters by increasing the winding coefficients and reducing the differential dissipation for polarity.

FIG. 1 shows a winding circuit; FIGS. 2 and 3 show the alternation of the phase-zones and the polygon MDS of the winding for a polarity of p2 5; in fig. 4 and 5 are the same as in FIG. 2, 3, but for the known two-layer winding; in fig. 6 and 7 are the star and the EMF diagram of the phase of the winding for polarities pi 2 and p2 5, respectively.

The winding (fig, 1) is made three-phase for p2 5 polarity in 75 grooves from 15 coil groups (with numbers from 1 to 15) with three concentric coils each with steps along the grooves Up 24, 22, 20 and turns numbers 2wK, 2wK, WK respectively. The phases contain groups with the numbers 1 + 3k, 2 + 3k, 3 + 3k, respectively, in I, II, III phases and connected to a star with the terminals of the terminals of the P1, P2, RZ phases and the zero point 0, where k O,

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ABOUT

with

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oh oh

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. In FIGS. 2-5, the phase zones are designated A – X, B – Y, CZ, in the numbering of the slots (from 1 to 75} the letter n is omitted and MDS polygons are constructed (for one repeating part of the winding in 75/5 15 grooves) on a triangular grid with a side equal to the unit of length.In Figures 6 and 7, the EMF vectors are assigned numbers of coil groups, and the EMF diagrams of the P1-0 phase show that the pi2 field does not induce an EMF at the P1-0 terminals (Fig. 6 ), and the field with P2 5 does not cause equalizing currents in the contours of the branches (Fig. 7). The winding of Fig. 1 has for the polarity of pi 2 15 phases (see star EMF of Fig. 6) and its winding factors p are: Kob2 - 0.9461 (for pi 2) and Cobb 0.9514 (for section 5) with an average coil pitch along grooves UPr 22.4. For a two-layer winding at q 75/15 5 (five coils per coil group) and Up 22 we have: Kob2 0.9363 and K065 0.8285.

According to FIG. 3 for the winding of FIG. 1 defines: Rq 21.0, R2 (75-0.9514 / 5лЭ2 20.63522 and 7Д5 (Rq2 / R2-1) 100 1.768%, where Rq2, R2, Od are, respectively, the squares of the average radius of the slot points of the polygon and the radius the circumference for the main harmonic MDS, the differential scattering coefficient for the polarity of pa 5. According to Fig. 5, for a two-layer winding, the following is determined: Rq2 16.0; R2 (75-0.8285 / 5Я) 2 15.64832 and 7д5 2.247%,

Thus, in comparison with the known two-layer winding, the proposed winding has an expanded field of application, since it is performed with pi / p2 2/5 in 75 grooves, it is simpler in design and production because of the smaller number of coils in the groups has improved electromagnetic parameters; higher winding factors K065 (0.9514 / 0.8285 1.15 times) and K0b2 (0.9461 / 0.9363 0

 1.011 times), less differential scattering 0d5 (2.247 / 1.768 1.27 times).

The proposed winding can be used in single-machine frequency converters of 60/200 Hz, performed in the construction of serial phase-rotor asynchronous machines with the number of rotor slots equal to 75. Its application allows to simplify the design and manufacture of the rotor, reduce copper consumption and insulation on the rotor, to reduce losses in copper and steel, to increase the efficiency and operational reliability of the combined electric machine.

Claims (1)

Claims One-two-layer combined rotor winding with the numbers of pole pairs P1 / P2, multi-phase short-circuited for polarity pi and three-phase for polarity P2, made of Zp2 coil groups and connected to a star with the terminals of phase terminals on three contact rings containing groups with numbers 1 + Зк, 2 + Зк, 3 + Зк respectively in the first, second, the third phase, and in each phase, the beginning of the groups are connected to the phase clamp, and their ends are connected to the star's zero point, characterized in that, in order to expand the scope, simplify the design, s also improve the electromagnetic parameters by increasing the winding coefficients and reducing the differential dissipated for polarity p2, the winding is made with the numbers of pairs of poles pi 2 and p2 5 in 75 slots with numbers from 1p to 75p from 15 coil groups with numbers from 1 to 15 and each coil group contains three concentric coils with steps along grooves Up 24, 22, 20 and numbers turns 2wK, 2wK, WK, respectively, the initial sides of the coils of group 1 are laid in the grooves 1p, 2p, 3p, and for each subsequent group, the specified stacking in the grooves repeats five offset slots relative to the previous group, where KO, 1,2,3,4. 14-15 P1 Fig} fa / vz / $ XjJz C | Jj / 1 3 5 7 9 P 13 15 2 Fig.z FIG. five I 7 170 1 3 5 7 9 77 73 75 Fig4 5 12 L + eleven FIG. 6 about