SU1138890A1 - Combined rotor winding - Google Patents

Abstract

1. COMBINED ROTOR WELDING with numbers of arp poles three-phase for polarity p with leads of phases on three contact rings, containing br-distributed coil groups with group numbers 1 + 3jj in the first phase, 3. + 3 "in the second phase, 5 + 3) in the third phase, connected in each phase in Pg parallel branches, and in each branch 7 Z 3 tf. In O n-F, two coil groups are connected in series-counter-odd and even, in order to expand the field of application by obtaining P / P. 1 is an integer, the coil groups of each phase branch are shifted by the angle K.if / p, rad. In each phase, the beginnings of the odd coil groups form a clamp of the beginning of the phases, and the beginnings of the even coil groups are connected to the output of the end of the phase, the coils pitch being equal to the whole parts of the number of 3k, where p 2, 1,2, .... (Zp - 1) to PJ / PI 0.5 is an odd integer, o / br or (C / 2 is the number of slots per pole (L and phase Z is the number of grooves; c and C are integers. 2. Winding along Po 1. This is so that, in order to improve the parameters, the middle points of the branches in each phase are connected together. 00 00 CX) .J

Description

1, The invention relates to windings of electric machines of alternating current and can be used, for example, in single-engine frequency and phase converters, in two-speed asynchronous motors, etc. The combined electro-winding windings, made from rast1, are known (equipped coils, connected in parallel branches for one polarity p, each of which has midpoint outputs for the beginning of the phases of another polarity R. The angle between the axes of the coils of the same branch is 2ii (p, glad and the number of turns in the coils is proportional to due to their shearing relative to the axis of the branch of the U. The disadvantages of such windings are complexity of design and manufacture, large losses from equalizing currents in branches X. The closest to the invention in terms of technical efficiency and the achieved result is the rotor winding of single-machine frequency converters with pole pole numbers Pn / P is an integer, three-phase for polarity, p „, containing br distributed coil groups connected in parallel p branches in phases into p. Each branch is connected in series-opposite groups, shifted to / n / rc rad when p / p is an odd number or (1 P / / PJ) Wp, glad when XR / RL even numbers Begin branches form three-phase clamps and pod1: contact rings, and the ends are connected to a common zero point and the contours of the branches form a multi-phase short-circuited winding for polarity p. 2J. A disadvantage of the known windings is of limited use, as is the ratio for them. 3 integer ,. The purpose of the invention is the expansion of the field of application by obtaining the numbers of pairs of poles r / p 1 integer at PJ 2. This goal is achieved by the fact that for a combined rotor winding with the numbers of pairs of poles, p- / p, three-phase for polarity p „with conclusions started phases on three contact rings containing br distributed coil groups with group numbers 1 + 3/1 in the first phase, 3 3 | 02 in the second phase, 5 + 3 | in the third phase, in each phase, connected in p, parallel branches, and in each branch, two coil groups are connected in series — odd with even, and the phases are connected in a star or in a triangle, the coil groups of each branch of the phase are shifted by Angle .TG / RL is glad, in each phase of the beginning of the odd coil groups, the clamp of the beginning of the phase is formed, and the beginnings of the even coil groups are connected to the end of the phase, and the step of the coils along the grooves is equal to the integer part of the number 3k.q, where p, 2, j 0, 1, 2, ..., (2р - 1), ki 0.5 is an odd integer, l 7 / 6p С or q с / 2 - the number of groove in per pole and phase, - the number of grooves, - c and c - integers. In addition, the middle points of the branches in each phase are connected together. FIG. 1 shows a simplified diagram of one phase of the proposed winding with PJ / P, 3/2; in fig. 2 and 3 diagrams of its EMF for the polarity of P 2 and p 3; in fig. 4-6 is the same as in FIG. 1-3, but for winding with Pi / P, 5/2. One phase of the proposed winding with numbers of pole pairs 3/2 is shown in FIG. 1, where the conventionally depicted coil groups in the amount of 2prt 6 have numbers from 1 to 6 and are connected in the Rl 3 branches. In each .... (. Up to the branches, two groups are connected in succession — odd with even, displaced by an angle n / 3 rad (groups 1 with 2; 3 with 4; 5 with 6), where k, is 0.5 i. The beginnings of the odd groups 1, 3 and 5 are joined together and form a clamp of the beginning of the phase p ,, and the beginnings of the even groups 2, 4 and 6 are joined together together at the end of the phase 0. In Figs. 2 and 3 (also Fig. 5 and 6 ) EMF vectors are assigned numbers of rpynni coils for polarity P. 2 Winding phase P1-0 (Fig. 1) forms a three-phase short-circuited system (Fig. 2), and for polarity p-3 a single-phase winding with p 3 branches (Fig. 3) When performing such an obm For three-phase (Wg 3) for PJ 3 polarity, it will have 6p 18 coil groups, will contain 1, 3p 9 9 phases for polarity p 2 and its phase (for p 3) can be connected into a star or a three square gon; groups in phases with this will be: 1 + 3 "1 A, 7, 10, 13, 16. in the first phase; 3 + 3V 3, 6, 9, 12, 15, 18 in the second phase, 5 + 3 i 5 , 8, 11, 14, 17, 20 in the third phase, where, 1) 5. One phase of the proposed winding with 5/2 is shown in FIG. 4 and contains 2p 10 coil packs (with numbers from 1 to 10). It is connected to the P 5 branches, each of which is connected in succession to the dpe group, which is smoked at an angle of 3 IT / 5 rad (groups with 4 ;. 3 with 6; 5 with 8; 7 with 10; 9 with 2), where k + 0.5 3. The beginnings of the even-numbered groups are connected together and form the clamp of the beginning of the P1 phases, and the beginnings of the even groups are connected together and form the output of the end of the phase of the P 2 phase, which forms the five-phase short-circuited system (Fig. 5 ), and for the polarity of X-ray 5, the phase has p 5 branches (Fig. 6). When performing the winding of the five-phase mode of FIG. 4 (for polarity of polarity 5 it will have 6p 30 30 coil groups and will contain, Sp of 15 phases for polarity PJ 2. The proposed winding can be completed with s or (c / 2, where q, .Z, / br , is the number of grooves. (Z) n

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Р1 Риг.З 904. . pole and phase, e and c are integers. The winding pitch of the grooves Yq is chosen equal to the integer part of the number, 3lt..Q: for example, with (1,, Z 18, k Pj / P - 0.5 1, y „k 3, m, 9 for PI J OBPA 0, 75 and Kobr.2 1.0 - winding factors for pole positions 2, and p 3; with CJ 1, VY) e 3, 5, - 30, k P2 / P, +0.5 3, UE 9, t, 15 (p 2), K Arr. 0.905 and Kae J 1,0, 1,5, 1П1, 3, р 5 -Ч. at 0 45, at 3 kc - 0.5 13 (k 3), KDSPI 0, IR 0.945. osp The midpoints of the winding phase branches (Figs. 3 and 6) are equipotential points for polarity P and can be joined together, which improves the operating conditions of the machine with the proposed winding during magnetic asymmetry, and reduces magnetic noise and vibrations. Thus, the proposed winding has a wider range of application as well as high values of the coefficients in comparison with the known one. It can be used on the rotor of asynchronous or asynron-synchronous single-machine frequency converters and the number of phases, on the rotor of a two-speed asynchronous motor with slip rings and DR.

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Claims (2)

1. COMBINED ROTOR WINDING with feather numbers p ₂ / p ^, three-phase for p ₂ poles with ¹ leads of phases on three contact rings, containing br ^ distributed coil groups with group numbers 1 + 3 ^ in the first phase, 3 . + 3 <in the second phase, .5 + 3, in the third phase, parallel branches are connected in each phase in Pg, and two coil groups are connected in series-opposite to each branch - odd and even, characterized in that, in order to expand scopes by obtaining P ^ / p, b 1 ί integer, coil groups of each phase branch are biased s at the angle k. p _m = 2, ί = 0, 1, 2, ... "(Ζρ ₂ - 1) χ к = Р ₂ / р <+0,5 = the integer is odd, = £ / бр ₂ = С.“ or = C / 2 - the number of grooves per pole and phase; And - the number of grooves; c and c are integers. 2. Winding on π. 1, characterized in that, in order to improve the parameters, the midpoints of the branches in each phase are connected together.