SU1050045A1 - Combined-type three-phase rotor winding - Google Patents

Abstract

THREE-PHASE MULTI-PHASE COMBINED ROTOR Winding with numbers of pairs of poles pgjp ,, containing brg of distributed coil groups, the phases of which for polarity pt are made with PJ parallel branches, are connected to a star, connected to contact rings and contain groups 1 -f3i for the first, 3-f3i for the second, 5 + 2i for the third phase, characterized in that, in order to simplify the design and manufacture, to reduce the consumption of copper, in each phase, the beginning of its odd groups are connected to a significant phase, and even to the zero point stars, with the ends of all groups Φ The basics are joined together, where pd. / p, 3 is an integer 1 0,1,2 ....,

Description

P 18 1 g 3 561 8 O U P 7213 / / 5 16

PT P2

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Fig. 1 The invention relates to coils of combined electric machines, for example, single-machine frequency converters and number of phases. Combined electrical windings are known, made in the form of parallel branches of one polarity p, each of which contains distributed coils, and having terminals of middle points that are the beginning of the phases of the other polarity pj. The angle between the axes of the coils of the same branch is 2 (p, + Pr) and the number of turns in the coils is proportional to the shift angle of them relative to the axis of the branch 1. The disadvantages of these coils are the design and manufacture of the coils, the large losses from the balancing currents in the branches. . Closest to the proposed is the combined winding of the rotor of single-frequency converters, made with the number of pole pairs Pj / Pj 3 integer and containing 6pj distribution coil groups connected in phases into p parallel branches in each of which are connected in series opposite two groups offset by p glad when p ,, / p is an odd number or at (1) jr / pf glad when Piipt is an even number. The beginnings of the branches form three-phase clamps with a polarity of p2 for the generator and are connected to contact rings. And the contours of the branches form a short-circuited winding with a polarity of r / dl of the engine 2. The disadvantages of such a winding are a large number of interfacial joints in the phases which equal to half the circumference of the rotor, which complicates the design and manufacture, increases the consumption of copper. The purpose of the invention is to simplify the design and manufacture, reducing the consumption of copper by reducing the paddle connections. This goal is achieved by the fact that in a three-phase-multiphase combined winding of the rotor with the numbers of pairs of poles Pj / Pj containing 6 pj distributed coil groups, the phases of which for polarity PI with p parallel branches are connected in a star, connected to contact rings and contain groups with numbers 1+ 3i for the first, 3 + 3i for the second, 5 + 3i for the third phase, in each phase of the beginning of its odd groups are connected to the phase clamp, and even ones - to the zero point of the star, with the ends of all the phase groups connected together, where pj / pjSr3 is an integer, 1 0.1, 2 ..., (2p2-1). - In FIG. Figure 1 shows a diagram of a known combined winding with pj / p (3; in Fig. 2 and 3, the EMF winding diagrams for polarity networks p, 1, and p 3; in Figures 4, 5 and 6, the same as in Fig. 1 -3 but for the proposed winding with PJI / PJ -4; Fig. 7 shows a diagram of the proposed winding with pj, containing 6 coils numbered from 1 to 24; Figures 8 and 9 show diagrams of the EMF of the P1-O phase for polarity, p 1 and p 4 (designations are the same as in Figs. 1-6). The known combined winding with the numbers of pairs of poles PZ / PI 3 contains 6 p 6x3 18 distributed coils (Fig. 1 with numbers from 1 to 18 Phases for polarity Pr 3 contain groups with numbers and 1 + 31 1,4,7,10,13 and 16 for the first phase P1, 3 + 31 3,6,9,12,15,18 for the second phase P2, 5 + 31 5, 8, And 14, 17.2 for the third phase of the relay, where 1 is 1, 2, 2, ..., (2 pr-1 5). These phases are connected to a star and the terminals of the beginnings of the Pb, P2, and RZ phases are connected to contact rings. The phases are connected sequentially, groups shifted by iB | p S rad, for example, for phase P1 - the end of group 1 with the end of group 10, the end, group 7 with the end of group 16, the end of group 13 with the end of group 4. The phase contains parallel branches. The zero point of the connection of the three phases to the star is indicated in FIG. 1 through O. On the EMF diagrams (Figs. 2 and 3) constructed for polarity p, 1, and, the EMF vectors are assigned the numbers of coils (the EMF of one phase P1-O is shown). For the proposed winding with p. (Fig. 4-6) the designations are the same as in Fig. 13. Here, in each of the phases, the beginnings of its odd coils are connected to the clamp phase, and the even ones to the zero point of the star, and the ends of all groups of the phase are connected together in a common point. For example, for the first phase: the beginnings of odd groups 1.7 and 13 are connected to the clamp of phase P1, the beginnings of even groups 4,10 and 16 are connected to zero point O, and the ends of all groups of phase 1, 4, 7, 10, 13 and 16 are connected to the seat. From the EMF diagram of the winding (generator phase) in FIG. 5, it can be seen that the phase of the P1-O generator forms a three-phase short-circuited system for a field with PJ 1. In general, all three generator phases 0.1-0, P2-0, P3-0 form a nine-phase short-circuited winding for a field with PJ I. From the EMF diagram of the P1-O phase for the PJ 3 polarity (Fig. 6), it can be seen that the generator phase contains p 3 parallel branches, in which even groups are opposed to relatively odd groups, the joints at the common point of the ends of all phase groups are joints windings for polarity Pr 3 This circumstance reduces the sensitivity of winding with respect to magnetic asymmetry, which improves the parameters of the proposed winding from the point of view of the reduction of magnetic noise. Thus, the consumption of copper for the coil connections in the proposed winding is less than in the known. The winding can be applied on the rotor of a single machine frequency converter.

asynchronous and asynchronous-synchronous types.

 Single-machine frequency converters with the proposed winding have a lower consumption of copper, are more technological in manufacturing and have better parameters for magnetic noise than converters with a rotor winding 2.

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FIG. 2

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Fig.Z

Claims (1)

THREE-PHASE-MULTI-PHASE COMBINED WINDING OF THE ROTOR with the numbers of pairs of poles rc / p, containing 6p _{g of} distributed coil groups, the phases of which for the pt pole are made with p _r parallel branches, connected to a star, connected to contact rings and contain groups with numbers 1 + 3i for the first, 3-4-3i for the second, 5 + 3i for the third phase, characterized in that, in order to simplify the design and manufacture, to reduce the consumption of copper, in each phase the beginnings of its odd groups are connected in a phase clamp, and even - in the zero point of the star, and the ends of all phase groups connected together, where p _l / p,> 3 = integer 1 == 0,1,2 ...., (2ρι- \). Figure 1 SU ₍₁₁ , 1050045>