SU1387117A1 - Three-phase pole-switching winding - Google Patents

Abstract

This invention relates to windings of alternating current machines. The purpose of the invention is to simplify the manufacturing technology and improve the use of active materials. The winding is made with the number of coils equal to 90 and the ratio of the numbers of poles 10/8. The design feature of the proposed winding is that it is made of two layers of in-section coils with a step y. equal to 9, united in 30 coil groups. The number of coils in each coil group is in accordance with the numerical series: 6,3,2,1, 3,3,1,2,3,6,6,3,2,1,3,3,1,2 , 3,6,6,3,2,1,3,3,1,2,3,6. The winding consists of nine parts. The distribution and activation of the coils in each coil group for all nine parts are given. 1 hp f-ly, 1 ill.

Description

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This invention relates to pole-switched windings of electric AC machines.

The aim of the invention is to simplify the manufacturing technology and improve the use of active materials.

The drawing shows the scheme of the winding.

The winding with the ratio of the numbers of poles 10/8 and step 9 has six conclusions and contains coil groups 1-30. The number of coils with order numbers from 31 to 120 in the coil groups is determined according to the number row:

6, 3, 2, 1, 3, 3, 1, 2, 3, 6,

6, 3. 2, 1, 3, 3, 1, 2, 3, 6,

6, 3, 2, 1, 3, 3, 1, 2, 3, 6, all the coil groups being distributed over nine parts A ,, Aj ,. Aj, B, B, Bj, C, Cj, Cj in such a way that part A is formed by series-connected coil groups with sequence numbers 3 and 18, and part Ar is connected in series coil groups with order numbers 17, 20, 22 and 26, part AZ - connected in series coil groups with sequence numbers 1, 4, 25 and 29, part C (- serially connected coil groups with order numbers 8 and 23, part Cr - connected in series coil groups with sequence numbers 7, 10, 12 and 16, part Cj - connected in series coil groups with sequence numbers 21, 24, 15, and 19, part B, are series-connected coil groups with order numbers 13 and 28, part B — series-connected coil groups with order numbers 27, 30, 2 and 6, part Bj — coil groups connected in series with sequence numbers 11, 14, 5, and 9, with coil groups with sequence numbers 1,5,6,10,11,15,16, 20,21,25,30 included oppositely with respect to the rest of the coil groups within the parts, and the parts that form when the number of poles, for example, eight, the "triangle" scheme, are included In the following order, A, A, Cj, C, B, Bj with conclusions 80, from the connection point of the end of part A and the beginning of part A 8Cj from the connection point of the end of part C and the beginning of part Cj, 8Cj from the point the connections of the end of part Bj and the beginning of part E, the beginning of parts A, B, Q, Q are connected to the external terminals of the winding 10C, lOCj, lOCj, respectively, and their ends with the beginnings A, B, Q, respectively.

In addition, the coils of parts A, B, C have a 1.73 times smaller number of turns as compared to the others with the same filling area of the groove with the active material.

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When the 8C ,, 8Q, 8C terminals are connected to a symmetrical mains supply and 10C, 10Q, lOCj free terminals, a rotating magnetic field occurs with a number of poles of eight. When the 10Q, CC, lOCj terminals are connected to a symmetrical mains supply and free terminals 8C, 8C2, 8Cj, a rotating magnetic field occurs with a number of poles equal to ten.

In the proposed winding, the winding factors are K, 0.886, KW, 0.782, 0.834.

In constructive terms, the winding is made of two layers and consists of 30 coil groups.

The proposed winding makes it possible to more fully use the active materials of the engine due to the use of one field-switched winding instead of two separate and, therefore, increase the engine power in a given dimension, by about 25% with the same electromagnetic loads, and reduce the labor intensity of winding manufacturing by 30-35 % compared to the base engine.

Thus, the proposed winding can be recommended for use in the electrical industry in the manufacture and installation of the stator windings of two-speed asynchronous high-power motors.

Claims (2)

1. Three-phase pole-switchable winding, made of nine parts L ,, Ai, A, B, B, 8, C, C, Cj, with the end of L, connected to the beginning of L, and the end of Cj, the end of Lg - with the beginning of A, the end of B - with the end of A, the beginning of B, the end of B - with the beginning of B, the end of B ,, - with the end of C, and the beginning of C g, the end of Q - with the beginning of C, With, Lz, Bj, Cj, characterized in that, in order to simplify the manufacturing technology and improve the use of active materials, the winding coils are combined into thirty coil groups with sequence numbers from 1 to 30, the number of coils in each This coil group is determined by the numerical series: 6, 3, 2, 1, 3, 3, 1, 2, 3, 6, 6, 3, 2, 1, 3, 3, 1, 2, 3, 6, 6, 3, 2, 1, 3, 3, 1, 2, 3, 6, all the coil groups being distributed over nine parts so that a part of L forms sequentially connected coil groups with sequence numbers 3 and 18, part A form, in series, coil groups with sequence numbers 17-20, 22 and -26, form a part of Lz, sequentially connected coil groups with sequence numbers -1, 4, -25, 29, part C, form serially connected coil groups with order numbers 8 and 23, part C form sequentially connected coil groups with sequence numbers 7, -10, 12 and -16, part C form series-connected coil groups with serial numbers -21, 24, -15 and 19, part B form series-connected coil groups with order numbers 13 and 28, part B form series-connected coil groups with pores Child rooms 27, -30, 2, and -6, part BD form sequentially connected coil groups with serial numbers -11, 14, -5, and 9, with coil groups with a minus sign included opposite to the other coil groups within parts . 2. Winding according to claim 1, characterized in that the coils of parts A, B, C, have 1.73 times less number of turns compared to the other coils with the same length, and fill the groove with the active material. uss mt AND "