SU750652A1 - Three-phase pole-switchable winding - Google Patents

Description

(54) THREE-PHASE FLOOR YUSOPER INCLUDES WINDING The invention relates to switchable windings of electric machines with current nepavtenHoro. The winding is known in the number of slots, a multiple of 36, with switching numbers of poles with only two co-switching devices according to the YYV / VYY scheme with respect to 2p: 2p 8: 6 And- When the symmetry between the phases is observed, the unbalance of the parallel branches on the number of poles occurs 2p 8. Also known is a winding made in the number of slots multiples of 36, with switching pole numbers in relation to 2p: 2p, 8: two switching devices, in which, to eliminate unbalance of the EMF, the branch does not used, 2 6 phase windings are included on T-about 2: This winding is asymmetrical when the number of poles is 2rp 6. A three-phase two-layer winding is also known in 72 slots with switching pole numbers in relation to 2p: 2p-8: 6 with uniformly distributed coil groups formed by a series of connections for a number of lying coils | 3 The disadvantage of this winding is the asymmetry of the system of supplying currents on the number of poles 2p 6. The aim of the invention is the simultaneous elimination of asymmetry:. unbalance of the EMF of the branches with respect to all the garms of the electric machine on both poles when switching the numbers of winding poles performed in the number of slots multiple of 72 in relation to 2p | : 2p „8: 6 two switching devices. This goal is achieved in that the coils of the windings are combined into groups according to a numerical row: 1, 3, 1, 2, 1, 4, 1, 2, 1, 3, 1, 1, 1, 1, 1; 1. 3, 1, 2, 1, 4, 1, 2, 1, 3, 1, 1, 1. 1, Ij 1, 3, 1, 2, 1, 4, 1, 2, 1, 3, 1 , 1, 1, 1, 1.

When the number of gypus 2p 8 each phase of the winding consists of series-connected parts. The first parts of each of the three phases are the G series-connected coil groups, made of cross-section wire 5 with the number of BITKs H, the numbers of the coil groups in phases in this part of the winding

phase A - 20, 30, 33, 39, 42, 7 phase B - 5, 15, 18, 24, 27, 37;

phase C - 35, 45, 3, 9, 12, 22

The beginnings of groups 20.5 and 35 form pins for the number of poles 2p 8,

The second parts of the winding phases contain three parallel branches in each (aze, each of the nine branches (numbering branches in Roman numerals in Fig. 2) consists of three coil groups formed by coils with the number of turns of a wire with a Si2 section of 0.5.

Numbers of coil groups according to the branches and phases of the second part of the winding:

Phase A: 1 branch - 16, 8, 2 D branch 43 36, 29; Ø branch - 25, 19, 11;

Phase B: IV branch - 1, 38, 32; Y branch 28, 21, 14-YI branch-Yu, 4, 41;

Phase (branch - 31, 23, 17 W branch - 13, 6, 4; x branch - 40, 34, 26.

Reel groups 16, 2, 36, 25,. 11, 1, 32, 21, 10, 41, 31, 17, 6, 4O, 26 are opposed to the others.

The ends of the branches 1,1V, yjl-,, yiH, tT, / j, lX are connected to common points, forming the conclusions for the number of poles 2p 6,

FIG. 1 shows the fouling schemes, FIG. 2 - connection diagrams of coil groups. At 2p 8 here in parallel

Only those coils that have identical phase angles of the EMF (see Fig. 3) are included, then the poe and the resulting EMF vectors of parallel branches are the same in size and sound, i.e. Nebaglans EMF is absent and equalizing points do not arise. By disabling the part; coils on 2p 6 takes place. full symmetry of the winding and, as a consequence, the absence of dips in the mechanical characteristics.

The invention can find application in machines of large dimensions.

Claims (1)

Invention Formula Three-phase pole-switching winding in 72 slots with switching. The number of poles in the ratio of 2p: 2p 8: 6 with evenly distributed coil groups formed by a series connection of a number of lying coils, with the purpose of improving use, the coil groups contain the number of coils , defined by numeric p dsm 1, G, 1, 2, 1, 4 1, 2, 1, 3, 1, 1, 1, 1, 1; 1,3,1,2.1,4,1,2,1,3,1,1, 1,1,1, 1, 3, 1, 2 1, 4, 1, 2, 1, 3, 1, 1 , 1, 1, Ij and each phase consists of. two series-connected parts, the first part of each phase consists of six series-connected coil groups with numbers 20, 30, 33, 39, 42, 7- for the first phase: 5, 15, 18, 24, 27, 37 - for the second phase: 35, 45, 3, 9, 12j 22 - for the third phase, and the second parts of each phase contain three parallel branches consisting of coils with numbers 16, 8, 2 - for the first branch of the first phase: 43, 36, 29 - for the second branch of the first phase: 25, 19j 11 - for the third branch of the first phase; 1, 38, 32 for the first branch of the second phase; 28, 21, 14 for the second branch of the second phase; 10, 4, 41 - for the third branch of the second phase; 31, 23, 17 - for the first branch of the third phase; 13, 6, 44 for the second branch of the third phase; 4O, 34, 26 - for the third branch of the third phase; Moreover, coil groups with numbers 16, 2, 36, 25, 11, I, 32, 21, 1О, 41, 31, 17, 6, 40, 26 are included opposite to other coil groups, and the conclusions are filled from sources 2O, 35, 5 coil groups and junctions of the same BeTBefft of all phases. (Refinees for the inspections taken into account during the examination 1, Vojtech A, A ,, Kirichek T. M ,, Lear E. In. Asynchronous motors with speed control. Kiev, Technique, p. 178, 1968. 2, USSR Author's Certificate No. 4OY422, class, H 02 H 3/28, 1972. 3, USSR author's certificate According to the application number 2441342, cl. H O2 K 3/2 dated 05.01.77, 3 Zy 33 V W 43 50 StfZf S 55 56S1SS 53 St 62 63 67 65 63 70 7111 II II II II tl li II II ll II II II I If | l and L | l l to It and il II II and t IMI ll IMI II II II iput.i Ess I m l-inc 4i: jjiiz - iiiE ciOn H to H l; and WCWA . / J part