SU1543503A1 - Three-phase pole-switchable winding for 1 and 6 pairs of poles - Google Patents

Abstract

The invention relates to electrical engineering and can be used in asynchronous motors with stepped angular velocity control by switching the number of pole pairs of the stator winding. The aim of the invention is to improve the energy performance. To this end, it is proposed to wind the winding of 36 coil groups included in nine parts of the winding A1, A2, A3, B1, B2, B3, C1, C2, C3 and two three-pole switches, each of the 9 parts contains 4 coil groups connected consecutively and consisting of identical rows of lying coils. The switches are provided with jumpers and connect the winding parts so that when one pole pair is switched on, parts A1, A2, A3 are connected in series and enter phase A, parts B1, B2, B3 are connected in series and enter phase B, parts B1, C2, C3 are connected in series and enter phase C. With six pairs of poles, connected parts A1, C2, B3 enter phase A, serially connected parts B1, A2, C3 enter into phase B, and enter into phase C United parts C1, B2, A3. At the same time, within each part of the winding, coil groups with even numbers are included in the counter-coil groups with odd numbers. 3 il.

Description

necks included in the winding, which include the corresponding EMF vectors. One, two, and three ütrists in FIG. 2 denote the EMF of the coils included according to the schemes of phases A, B, and C, respectively, and one, two, and three strokes with a transverse stroke denote the vectors of the EMF of the coils included in opposite directions in the schemes , B and C respectively. Letters H and K designate the beginnings and ends of the corresponding parts of the winding Beginning of parts A1, B1, C1 are connected respectively to the external terminals A, B, C, and their ends to the first, second and third upper terminals of the first three-pole switch P1, respectively, the beginning of A2 parts ,

82, C2 are connected to the first, second and third middle terminals of the first three-pole switch P1, respectively, and their ends to the first, second and third upper terminals of the second three-pole switch P2, respectively, the beginning of the parts A3,

83, NW is connected to the first, second

and the third middle pins of the second three-pole switch P2, respectively, and their ends are interconnected; in addition, the switches are equipped with jumpers connecting the first lower with the second upper, the second lower with the third upper and the third lower with the first upper outputs of each of the switches P1 and P2, each of parts A1, A2, A3, B1, B2, VZ, C1, C2, Sz consists of successively connected coil groups with the numbers: 1.7, -22, -28 in part A1; 3.9, -18, -24 in part A2; 5.11, -20; -26 in part A3; 15, 21 -30, -36 in part B1; 17.23, -32, -2 in part B2; 13,19, -34, -4 regarding the OT; 29.35, -8, -14 in part C1; 25.31, -10, -16 in part C2; 27.33, -6, -12 in the NW part, with the minus sign in front of the coil group number means that it is included opposite to the coil groups with a plus sign, and each coil group includes S in series according to the included coils (S 1 2,3 ...).

Winding works as follows.

When the switchgear P1 and P2 is installed in the upper position in accordance with the scheme in Fig. 1, the coil groups are distributed over the phases of the winding as

0

five

0

five

0

five

0

five

0

five

indicated in the rows of table 1. When connected to a network, such a winding creates a main rotating magnetic field with one pair of poles. When switches P1 and P2 are installed in the lower position in accordance with the scheme in Fig. 1, the coil groups are distributed in phases as shown in the columns of Table 1. In this case, the winding creates a main rotating magnetic field with six pairs of poles.

The pole-winding comparison is made according to the energy indices of the induction motor with the windings being compared, which are estimated by the minimum values of torque and net power at the same permissible maximum values of induction in the air gap and current density in the windings, permissible according to the conditions of engine heating. Comparison is also made in terms of the complexity of manufacturing the winding, in the complexity of the control circuit.

The results of the comparison of the windings: analogue, prototype, and the proposed one are listed in Table 2.

From Table 2 it can be seen that the proposed winding, as compared with the analog winding, makes it possible to increase the power of the motor in constant power drives by almost an order of magnitude (0.161 / 0.018 8.94). Compared to the prototype winding, the proposed winding allows increasing the engine power in constant power drives by 15% (0.161 / 0.1395-1154) and reducing the no-load current at p 6 by 15% due to an increase in the winding ratio during this switch-on.

Thus, the proposed winding, providing a higher value of power in drives of constant power, has a higher energy. getic indicators compared with the winding prototype.

Claims (1)

Invention Formula Three-phase pole-switched winding for 1 and 6 pairs of poles, consisting of identical uniformly distributed coils, forming coil groups in S sequentially according to the included coils, connected in nine parts A1, A2, A3, B1, B2, VZ, C1, C2, SZ , and two three-pole switches, each of which has three groups of conclusions on 51 three pins in each group with the possibility of closing the circuit between the middle and upper or between the middle and lower pins, with the beginning of parts A1, B1, C1 connected to the external terminals of the winding A, B, C, respectively, and their ends with the first, second and third ft the upper terminals of the first three-pole switch, respectively, the beginning of the parts A2, B2, C2 are connected to the first, second and third middle terminals of the first three-pole switch, respectively, and their ends to the first, second and third upper terminals of the second three-pole switch respectively Naturally, the beginning of the parts A3, VZ, SZ are connected to the first, second and third middle terminals of the second three-pole switch, respectively, and their ends are connected to each other, in addition, the switches are equipped with jumpers connecting the first lower to the second upper, second lower to third upper and the lower third with the first upper pins of each switch, characterized in that, in order to improve energy performance, it consists of 36 coil groups with numbers from 1 to 36, with coil groups with numbers 1.7, -22, -28 included in series in part A1, coil groups with numbers 3, 9, -18, -24 included in series in part A2, coil groups with numbers 5.11, -21, -26 included in series in part A3, coil groups with numbers 15.21, -30f-36 included in series in part B1, coil groups with numbers 17.23 , 32, -2 are included in series in part B2, coil groups with numbers 13,19, -34, -4 are included in series in part of OT, coil groups with numbers 29,35, -8, -14 are included 0 in series in part C1, coil groups with numbers 25.31, -10, -16 are included in series in part C2, coil groups with numbers 27.33, -6, -12 are included in sequence5 but in part SZ, where the minus sign is before the number reel group means that it is included in the opposite direction to the reel group with a sign, a S is a natural number. a plus, I A 6 A1 1.7, -22, -28 3.9, -18, -24 5.11, -20, -26 B1 13.19, -34, -4 15.21, -30, -36 17.23 , -32, -2 C1 25.31, -10, -16 27.33, -6, -12 29.35, -8, -14 az Ku 0.966 , Kf 0.956 one 36 120 6 15 6 36 60 6 15 1 72 120 3 thirty 6 72 h 120 3 30 1 72 110 6 30 1,00,966 1,00,966 0.866 0.827 0.837 0.827 Table 1 I AT 6 C6 Table 2 6 72 h 1 72 6 72 0 3 thirty 120 3 30 110 6 30 60 6 30 1.0 0.966 0.924 Unmatched Not one 0.866 0.8 0.837 0.8 Simm Simm Simm Simm Yes No No No (CG29.35-v, -K) (hscc-psh-® Fig. / Continuation of table 2 0.8 Simm Not 0.966 Simm Not t 105 MM  66 fM, 96 / S4t7tj80t4Ј N7.95,83,7 / №47, Sch94,82№56, nsfspi & w IKplfOfiB & U 4 44 .45 46 8m S-2% 5i V & H  60 W  62 0-6 Ts4Shch73№72-72 LSHSHCHUTSYU 5-2 U 30 Ш1, % -L40) 52,64 76№LO Schshchtstscht 4Ч6ФЩЮ FIG. 2 @% 1L1L 1 M & 3S t 23 458789 10 ft .ittfbfb & zj s t & 55 (tMtc). , a -.smbt) lP «« y V S J «aS« j | .Kl about KCZ oh oh oh oh oh KBt Ш1К82 № КVЗ НАЗ ЈJiJjlJtJiJiJLJЈJl, JЈJЈJЈJЈ ЈLJЈJi2 N5 C, o ,. gS SSfec S hG (, QnCoCno Cricr.5; r;., cr, c; &O; SSPL & S & SS & & & & t 1.00QO QoQ3QQ CoCOQOQ3o3 5r ,, 01ChC, C 1-7Z S 2 HC2. 3