SU957431A1 - Three-phase pole switching winding - Google Patents

Description

(54) THREE PHASE REPLACEMENT COUPLING

one

The invention relates to electrical engineering and is intended for use in pole-: switchable AC motors.

The three-phase pole-switching winding is known with a pole ratio of 3: 2 1.

The disadvantage of this winding is an open circuit when switching from one number of poles to another.

A three-phase pole-Q winding is also known with a ratio of pole numbers of 2: 4 with 36 stator slots, in which, in order to improve the energy characteristics of the machine and to obtain unidirectional rotation of magnetic fields when the winding is connected, 5 according to the branch switching circuit by connecting the leads from the middle the points of the sides of the triangle to the outlines from the opposite vertices of the triangle, the problem of the rational choice of regularity, the division of 20 coil groups along the branches and their correct charge connections, as well as the correct choice of the number of coils in the respective coil groups 2.

However, the obtained patterns of distribution of the coil groups and their mutual soybeans: the dyneny do not allow winding charged poles, the ratio of which is excellent in the 2: 4 ratio.

The purpose of the invention is to expand the field of application of the winding with pole switching by connecting the leads from the midpoints of the sides of the triangle to the opposite vertices of the triangle, creating a winding circuit on the ratio of the numbers of pole pairs, 3: 2.

The goal is achieved by the fact that the coil groups connected in 6 branches, which are uniformly located on the bore, form a large number of poles, for example, 6, the regulaaos circuit, the first and fourth branches on the coil groups with serial numbers, determined by the Mif from the expressions :

Claims (2)

i + lBe-bgil: - ,. The second and fifth branches include coil groups with sequence numbers determined from the expressions. , 14-1be-9 I8N9e-9 | 35b The third and sixth branches include the coils of the group with sequence numbers defined by the expressions of the 9th, snake + 9 Е8Е49 -) and the coil groups with the order numbers defined by the expressions / 7 + 182 + 9-it se + Q 3 -186-1-9 i4- -tee-9 are included opposite to the other coil groups of the respective branches, where 1 O, 1, 2. . . (k -1) is an integer; k is the number determined by the multiplicity of the numbers of the winding poles to the numbers: 6 and 4; n is the number of the corresponding branch. When performing winding from coils whose numbers are a multiple of 36, coil groups with serial numbers; 4 + 18 7+ 18 14-I8 i an - - - - j 3-i8 b + 9 - double the greater number of bowels, and the coil groups with serial numbers: ll-l-18 -9 3 | 5 :; 6-I8 t + 9, - three times more number of coils than coil groups with serial numbers; 17-I8 +9; and the total number of coil branches are the same. Figure 1 shows a circuit for connecting winding windings; in fig. 2 - a variant of the two-layer winding scheme for 6 and 4 poles with 36 slots of the stator; FIGS. 3 - 6 show two variants of the winding circuit for 12 and 8 poles with 72 stator slots. The first branch (FIG. 1) is connected between terminals A and C and contains coil groups; 1, 4 and 7 (Fig. .2) from a series of eighteen evenly spaced coils. Katutpechnye groups 1, 4 and 7 each contain two coils, of which 1 and 7 are included opposite. The second branch (Fig. 1) is connected between terminals C and B and contains coil groups 11, 14 and 18 (Fig. 2). Coil group 11 contains three coils. The coil band 14 contains two coils and the coil band 19 is turned on. It contains one coil. A third branch is connected between terminals B and (Fig. 1) and contains coil groups 17, and 6 (Fig. 2). Coil group 17 contains one coil, coil group 3 contains two coils and is switched in opposite, coil group 6 contains three coils. The fourth branch is connected between the terminals A and C (Fig. 1) and contains the coil groups 10, 13 and 16 (Fig. 2). The coil groups 10, 13, and 16 each contain two coils. Coils 10 and 16 are included counter. The fifth branch is connected between terminals C and B (Fig. 1) and contains coil groups 2, 5 and 9 (Fig. 2). Coil group 2 contains three coils, coil group 5 contains two coils and is switched in opposite, coil group 9 contains one coil. The sixth branch is connected between Outputs B and A (Fig. 1) and contains coil groups 8, 12 and 15 (Fig. 2). Coil group 8 contains one coil, coil group 12 contains two coils and is switched in opposite, coil group 15 contains three coils. One of the variants of the winding (Fig. 3 and 4) is obtained by the series connection of the corresponding branches of the original winding, the second (Fig. 5 and 6) is parallel. During the operation of the machine with the proposed winding-. Terminals A, B, C are connected to the three-phase network. To excite a magnetic field with a smaller number of poles by the winding, the terminals A, B and C must be connected to the respective A, B, C phases. To excite a magnetic field with a large number of poles by a winding, terminals A, b, and c must be left free. In this case, the component of the magnetic field with a smaller number of poles is not completely destroyed, however, since the direction of rotation of the second component of the magnetic field coincides with the direction of rotation of the magnetic field with a large number of poles, this does not lead to a noticeable degradation of the mask. turning on a larger number of poles. The use of a winding when implementing a switching circuit of three-phase pole-switching winding branches by connecting pins from the midpoints of the sides of a triangle to pins from opposite vertices of the triangle improves the power characteristics of the machines as compared to using known windings and simplifies the drive switching circuit. To switch poles, you need a contact that is designed only for half the power of the engine. The invention has a three-phase pole-switching winding comprising evenly arranged coil groups on the magnetic conductor connected in six branches connected in series from the points of connection points of the branches, in order to expand the field of application of the windings to the said connection diagram, into the first and fourth The branches are connected in series with coil groups with sequence numbers determined from the expressions: 1 Ивет9 i44 8e- 9 J, the second and fifth branches include coil groups with order numbers , defined, from forms t.tsIvS-9 - -.H -iee-g 184186-9 - g in the third and sixth branches included coil groups with sequence numbers determined from the expressions:, (8e- 9; 3 + 18e- 9, and the coil groups with the order number determined from the expressions; 4-i8y + 9 1 i + iee + gy-; Ht-iee-a -, 3 + 19849 31 are included opposite to the other coil groups of the corresponding branches, where 1 is O, 1, 2 ... (k-1) is an integer; k is a number that determines the multiplicity of the number of winding poles to the numbers 6 and 4; n is the number of the corresponding branch. 2. Winding according to claim 1, characterized in that, in order to make full use of materials when performing winding from coils, the number of which is a multiple of 36, coil groups with order number meters: 1 + ieG 9 4 + 18e +, hr + -f8e + 9 -i 14аае-9, contain twice the number of coils, and the coil groups with the order numbers 11 + 18 6 + 18 6 + 9 are three times the number of coils than the coil groups with psf home sensors 18 + 18 -9 17 +18 +9, and the total number of coil branches are the same. Sources of information taken into consideration in the examination 1. Authors certificate of the SSX: Р N 408432, cl. H 02 K 3/28, 1966. 2. Authors certificate of the USSR N 468535, cl. H 02 K 3/28, 1978. g i Wi7idi g 3 $ 6 2 ABC FIG. g 0 /) .SfL 00 5 s ug.J 5