SU1417125A1 - Three-phase/two-phase switchable-pole winding - Google Patents

Abstract

The invention relates to the field of electrical engineering and can be used in electric motors with switching numbers of pairs of poles, in particular. in lift engines, i.e., it solves the problem of obtaining pole-switched windings with a wide ratio of the numbers of pairs of poles. The purpose of the invention is to expand the field of application by obtaining the ratio of the numbers of pole pairs pi / p2 2/9. The winding consists of equal-winding coils uniformly distributed along the grooves of the magnetic circuit. The coils are grouped in branches, which are connected into four three-phase stars, and the like conclusions of these stars form a group of three-phase leads to two pairs of poles, and zero points form a group of four-phase leads to nine pairs of poles. The induction curve of the field created by the power supply from each of the sides approaches the shape of a sinusoidal wavelength, and the winding factors for both poles are at the level of these factors for conventional multiphase windings, which makes it possible to design pole-switching asynchronous motors with one winding (instead of two) on stator and, therefore, with a higher use of active materials. 3 il. I (L

Description

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The invention relates to electrical engineering and can be used, for example, in electric motors with switching numbers of pairs of poles,

The purpose of the invention is to expand the field of application of the pole-switched winding by obtaining the ratio of the numbers of pole pairs pi / p2 2/9.

FIG. Figure 1 shows the unfolded scheme of a three-phase-two-phase pole-winding coefficients, 8312 and Cobr2 1. The proposed winding is perfectly symmetrical on both sides. It gives the ratio of the number of pairs of poles P | / P2 2/9, which allows its use in wide-distributed elevator pole-switched asynchronous motors. In the proposed winding (as opposed to the prototype), from the side of nine pairs of poles there is the possibility of power supply from two or

of a two-layer winding on a three-phase source ratio (in the second case, the numbers of pole pairs pi / p2 2/9 are c) the engine with such a winding in Fig. 2 is retained electrically on the stator with a significant polarized winding circuit with a triple asymmetry or even a breakage of a single pole switch P; in Fig. 3 - from the source phases), the smaller magnetizing forces generated by the winding 5 are switched, their contacts (three instead of twelve) are used, which simplifies the design and increases reliability, significantly better winding factors from both poles due to the exclusion of demagnetizing conductors, due to

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Winding. Consists of 36 coils, in which in the first branch of the first star () the coils 4, 20, 24; in the second branch of this

the stars (В-D) include coils 8, 12, 28 and in 20 of which an induction motor with such a winding third branch (CD) includes coils on the stator which have higher energies - 16, 32, 36; coils 2, 6, 22 are similarly included in the first branch of the second star (); in the second branch (BE-E /) - coils 10, 26, 30 and in the third branch 25 (С-D) - coils 14, 18, 34; in the first branch of the third star (AE) similarly included coils 1, 5, 21; Into the indicators.

Claims (1)

Invention Formula Ru branch (BE) - coils 9, 25, 29 and in the third branch (CE) - coils 13, 17, 33; The three-phase-two-phase pole-switched two-layer winding, consisting of uniformly distributed equilibrium coil groups of the same pitch, combined into four three-phase stars. in the first branch of the fourth star (A – E) 30, the same phases of the branches of which are subclusterly coils 3, 19, 23 are included; to the second branch (B – E — coils 7, 11, 27; and to the third branch (C – E — coils 15, 31, 35, In FIG. 2, the beginning of coils 1-2, 9--10, and 13-14 are switched by contacts 35 to expand the range of application of the switch. In the node with tap A, by obtaining the ratio of the number of pairs of dinenets, the phase branches of the first, second, third and fourth stars with conclusions from They are connected to individual pins forming one system corresponding to 2pi poles, and zero points are connected to pins forming another system corresponding to 2p2 poles, which is different from that. Dinena coils 1, 2, 3, and 4, similarly to the pi / p2 2/9 surroundings, the winding contains thirty-six coil groups, and in the first branch of the first star, successively, in the node B of the branch with leads from. according to included reel groups with coils 7, 8, 9, and 10 and in node C — branches with sequential numbers 4, 20, 24, the second with the coils from coils 13, 14, 15, and 16, and the branch - coil groups 8, 12, 28 and left points are formed by the first star (output P) branches with leads from coils 24, 28 and 36 for the second star (conclusion D) - the third branch is the coil groups 16, 32, 36, in the first branch of the second star the coil-like ones are consistently included the conclusions from coils 22, 30 and 34 in the third 45 group 2, 6, 22, the second branch - coils of stars (conclusion E) - the conclusions from coils 21, 29 and 33 and the fourth star (conclusion E) - conclusions from coils 23, 27 and 35. When three-phase power is connected to terminals A, B, and C (contacts are switching groups 10, 26, 30 and in the third branch - coil groups 14, 18, 34, in the first branch of the third star in series, according coil groups 1, 5, 21 , in the second branch - coil groups 9, 25, 29 bodies P are closed) in the air gap is about 50 and in the third branch - coil groups 13, is close to a sinusoidal four-17, 33, the first branch of the fourth star is anapolar with a magnetic wave, and when powering the clamps D, D, E, E (the contacts of the switch P are open) from a two-phase source — an eighteen-pole rotating wave. The patterns of magnetizing forces created by the pole-switched winding are shown in FIG. 3, they correspond 55 coil groups 3, 19, 23 are logically included, coil groups 7, 11, 27 are in the second branch and coil groups 15, 31, 35 are in the third branch, conclusions are made from the same phase branches of the first and second stars and the third and fourth stars of the same name intended to be connected to the switch. winding factors, 8312 and Kobr2 1, The proposed winding is perfectly symmetrical on both sides. It gives the ratio of the number of pairs of poles P | / P2 2/9, which allows its use in wide-distributed elevator pole-switched asynchronous motors. In the proposed winding (as opposed to the prototype), from the side of nine pairs of poles there is the possibility of power supply from two or a three-phase source (in the second case, the normal operation of the motor with such a winding on the stator is preserved with significant asymmetry or even breakage of one of the source phases), fewer switches are used, their contacts (three instead of twelve), which simplify the design and improves reliability, significantly improves winding ratios from both poles by eliminating demagnetizing conductors, due to  the asynchronous motor on the stator has tic indicators. ron engine with so tore has higher Invention Formula Asynchronous motor with such a winding on the stator has a higher energy The three-phase-two-phase pole-switched two-layer winding, consisting of uniformly distributed equilibrium coil groups of the same pitch, combined into four three-phase stars. the same phase of the branches of which the subcluster is intended to expand the field of application by obtaining the ratio of the numbers of pairs They are connected to individual pins forming one system corresponding to 2pi poles, and zero points are connected to pins forming another system corresponding to 2p2 poles, which is different from that. branch - coil groups 8, 12, 28 and in the third branch is the coil groups 16, 32, 36, in the first branch of the second star the coil-like ones are consistently included groups 2, 6, 22, in the second branch - coil groups 2, 6, 22, in the second branch - coil groups 10, 26, 30 and in the third branch - coil groups 14, 18, 34, in the first branch of the third star in series included coil groups 1, 5, 21, in the second branch - coil groups 9, 25, 29 and in the third branch - coil groups 13, 17, 33, in the first branch of the fourth star anai in the third branch - coil groups 13, 17, 33, in the first branch of the fourth star ana coil groups 3, 19, 23 are logically included, coil groups 7, 11, 27 are in the second branch and coil groups 15, 31, 35 are in the third branch, conclusions are made from the same phase branches of the first and second stars and the third and fourth stars of the same name intended to be connected to the switch. pttttp i 23 4 5 6 78 9i () in2f3f i5 i61 1819 2D 2122 22 2627 28 2930213253 2i 35 36 shhhhh about 0 60 / 9nUn Fig. / about about about ED D fS, 32, J8 tol Oq five Th h | fD In F CNJ tXb cxj § CSJ 5l 2P t i r  QO t o U-, -4h tx f CVi .