SU1319177A1 - Three-phase three-speed winding - Google Patents

Abstract

The invention relates to electrical engineering. The purpose of the invention is to expand the scope of use, increase the use of winding copper. The winding is made with the ratio of the numbers of pairs of poles 2: 3: 4, contains 12 coil groups (kg). Odd CGs are interconnected in three parallel branches with sequence numbers of two opposite CGs 1–7 for the first branch, 9–3 for the second branch, 5–11 for the third branch, and even CGs 10.6.2 are made with a copper cross section twice as large and connected to the midpoints of parallel branches with odd KG, forming a fourth, 7 i, respectively (L

Description

13191

the fifth and sixth branches of the winding, from the beginnings of which conclusions are made for the number of pairs of poles, and from the connection points of the branches with even and odd CG, conclusions are for. To simplify the winding and increase the use of winding copper, KG 4,8,12 are filled with two coils per group and with a number of turns.

one

The invention relates to multi-speed pole-selectable windings of electric machines of alternating current.

The purpose of the invention is to expand the field of application of the winding by placing in the number of slots, increasing the use of winding copper and simplifying the winding.

FIG. 1 shows a circuit for connecting the elements of a three-phase pole-switched winding with a ratio of pole pairs 2: 3: 4; FIG. 2 shows a three-phase, three-speed winding circuit with 4,6,8 for a number of slots.

The three-phase three-speed winding with the ratio of the numbers of pole pairs 2: 3: 4 contains 12 coil groups with numbers from 1 to 12 evenly distributed over the machine bore, in which the odd coil groups are made with three coils in the group and are interconnected in three parallel branches with two coil groups in each branch, the sequence numbers of which are 1–7 for the first branch, 9–3 for the second and 5–11 for the third branch. Even-numbered coil groups 10, 6, 2 are made with the number of turns in each coil and the number of coils in the group are the same and with a copper cross-section twice as large (wound in two wires) compared to the odd coil groups. They form the fourth, fifth and sixth, respectively. branches of the winding, which are connected to the middle of the first, second and third branches with a consonant inclusion of even and odd groups at the points of connection. Coil groups 4, 8, 12 are made with two

77

in the coil, four times smaller than the odd KG, connected together in series in the seventh branch and connected to the beginning of the fifth branch. From the beginning of the seventh branch and from the junction points of the first, second and third branches, conclusions are made for. 2 Il.

five

0

five

35

0

40

The coils in the group and with the number of turns in the coil are four times smaller, and the copper section is four times larger (wound in four wires) compared to the odd coil groups. They are interconnected in series in the seventh branch, which is connected to the beginning of the fifth branch, with the coil groups of both branches connected to each other in opposite directions (Fig. 2). The winding pins for the number of pole pairs A, B, C are made from the connection points between the first and the fourth, second and fifth, third and sixth branches, and from the beginning of the fourth, fifth and sixth branches, conclusions AJ, Cg, Bg dl are made. Conclusions A, C, Bj, windings for are outputs from the connection points between each other of the first, second and third branches and from the beginning of the seventh branch (Fig. 1).

Proposed, the winding is single-layer-double-layered and is intended for the number of slots and a multiple of 48. The rotation frequency is switched using 9 pins. At the number of pole pairs, power is supplied to the terminals Ag, Bg, Cg and the winding is connected in a star with two parallel branches. In the case of a winding, the T-shaped is connected to three parallel branches by connecting the Ag, Bg, Cg leads, and the three-phase power is supplied to the A, b, Cg leads. For an engine with a number of pole pairs, power is supplied to the outlets A, B, C, and the winding is connected into a star with four parallel branches by interconnecting the terminals Ag, Be, C 5.

313

In the winding, the symmetry of the currents in the phases is ensured for all values of the number of pole pairs. The use of winding copper with the number of pole pairs is 100%, and with and p 2 75%. The winding has three separate outputs for each number of pairs of poles. It can be used in multi-speed asynchronous motors, in machines with an internal cascade, and in adjustable motors with a contactless change in the number of pole pairs.

The effect of using the proposed winding is achieved due to the expansion of its application area for the number of grooves and a multiple of 48. In addition, the known winding has a relatively low use (66.6%) of winding copper for all values of the number of pole pairs and contains a relatively large number of structural elements ( 18 reel groups). The application of the proposed winding allows reducing the number of coil groups by 33%, increasing the use of winding copper by 33.3% with and by 8.4% with and, which provides an increase in engine power with this winding in a given dimension by 10-20% , reducing the complexity of manufacturing winding by 15-20%.

Claims (1)

Invention Formula Three-phase three-speed winding of alternating current machines with a ratio of pole pair numbers of 2: 3: 4, consisting of 12 coil groups evenly distributed over the machine bore, with serial numbers 1-12, in which odd. Coil groups are made with three coils in the group and interconnected in three pairs 5 o 5 0 5 0 five 0 774 Leaf branches with two counter-connected coil groups in each branch, the sequence numbers of which are 1-7 for the first branch, 9-3 for the second branch and 5-11 for the third branch, and even-numbered coil groups 10, 6, 2 are made with a copper section two times larger than odd coil groups and form the fourth, fifth and sixth branches of the winding, respectively, the fourth branch is connected to the middle of the first, fifth to the middle of the second and sixth to the middle of the third branch with a consistent inclusion of even and odd coil groups in points of connection with the conclusions from these points for the number of pairs of poles, and from the beginnings of the fourth, fifth, and sixth branches, conclusions are made for the number of pairs of poles and from the points of connection between the first, second, and third branches, conclusions of phases A and C for, This is to ensure that, in order to expand the field of application by placing in the number of grooves, increasing the use of winding copper and simplifying the winding, coil groups 2, 6, 10 are made with the numbers of coils in groups and with the numbers of turns in coils the same with odd coil groups, and coil groups 4, 8, 12 connected to each other in series, forming the seventh-1st branch, which is connected to the beginning of the fifth branch, and at the junction point, the coil groups of both branches are interconnected, with the coil groups of the seventh branch being made with two coils in the group and with the number of turns in the coil four times smaller than odd coil groups, and phase B was the conclusion of phase B for the number of pole pairs. x Compiled by A. Ketsaris. Editor N. Tupitsa Tekhn.N. Glushchenko Proofreader V. But ha Order 2524/51 Circulation 660. Subscription VNIIPI USSR State Committee . on affairs of 13 acquisitions and discoveries 113035, Moscow, Zh-35, Raushsk nab. 4/5  . „“ ..... “.- ..“.-...- “.-------- - - Production and printing company, Uzhgorod, Projecto st., 4