SU1453535A1 - Three phase switchable-pole winding for 8:6:4:2 pole ratios - Google Patents

Abstract

The invention relates to multi-speed pole-selectable windings of electric machines of alternating current. The purpose of the invention is to reduce the number of findings. A winding with a pole ratio of 8: 6: 4: 2 for 54 slots contains 12 coil groups (kg), each of which is made of two concentric coils with

Description

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steps along the grooves in 11 and 5 even KG and in 10 and 6 odd KG, At the same time the odd KG are interconnected in two opposite directions in three branches x with numbers 1-7 in the first, 9-3 in the second and 5-11 in the third branches. The even CGs are interconnected in two opposite directions with numbers 4–10 in the fourth 12–6 in the fifth and 8–2 in the sixth branch, and the ends of these branches are connected respectively to the middle of the first, second and third branches with a consistent inclusion of even and odd KG at the junction points. Between the two coils of even KG with numbers

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

The aim of the invention is to reduce the number of winding leads.

FIG. 1 shows a diagram of the connection of elements of a three-phase pole-switched winding with the ratio of the numbers of pole pairs 4: 3: 2: 1; FIG. 2 illustrates a three-phase pole-switched winding circuit with pole numbers of 8, 6, 4, 2 for the number of slots z 54j in FIG. 3 - a three-phase pole-switched winding circuit with the number of poles 8,6,4,2 of two-layer execution is deployed.

; The three-phase pole-permutable winding with the ratio of the numbers of pairs nojnoses 4: 3: 2: 1 contains 12 main coil groups evenly distributed over the machine bore, each of which is made of two concentric coils with steps along the grooves of the even-coil groups of 11.5 ( 1–12, 4–9), and the coils of the odd coil groups at 10.6 (1–11, 3–9), with the axes of the coil groups displaced among themselves along the bore of the machine by 4.5 groove divisions. Additional coils, numbered 13-15, are arranged concentrically between the two katzptkakh even coil groups with numbers 4,8,12, which are made with a groove step of 9 and

4,8,12 additional coils are concentrically located, marked with numbers 13,14,15, which are made with groove steps at 9 and c. the number of turns in the coil, two times smaller than the other coils of the winding. These coils form the seventh, eighth and ninth branches, the beginnings of which are interconnected, and the ends - with the middle of the fourth, fifth, and sixth branches. The winding has 12 conclusions made from the beginnings, midpoints and ends of the first, second and third branches and from the beginnings of the fourth, fifth, and sixth branches. 3 il.

with the number of turns in the coil, two times smaller, and the copper cross-section twice as large (wound in two wires) compared to the other coils (Fig. 2). The main odd coil groups are interconnected in two opposite directions in three branches x with serial numbers 1-7 in the first, 9-3 in the second and 5-11 in the third branch x, and from the beginning, middle and end of each branch are made pins labeled Ag / A, A4, Aj / C, respectively, for the first, Cg / A,

j B, Cf (/ C for the second and Bg / A, C, Bg / C for the third branches. Even coil groups are interconnected by two by their beginnings, the serial numbers of which are 4-10 in the fourth, 12-6 in the fifth and 8-2 in the sixth branch x, with the ends of the fourth, fifth and sixth branches representing the ends of the coil groups with numbers 10,6,2 connected to the middle of the first, second and third branches, and from the beginning of the fourth, fifth and the sixth branches representing the ends of the coil groups with numbers 4,12,8 are made, the conclusions are indicated respectively

FA.4 / B, VT./B,. Additional coils 13–15, forming the seventh, eighth, and ninth branches, respectively, are interconnected by their beginnings, and the ends are connected to the middle of the fourth, sixth, and fifth winds (figure 1).

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The winding has 12 terminals, with the help of which the number of poles is switched. At the number of poles, power is supplied to the interconnected Ag / A and AI / C, OT / A and Bg / C, Cg / At and Cg / C terminals, and the phases of the winding are connected into a star with two parallel branches by connecting between A and A4 / B, B and B4 / B, C4 and.

The operation of the engine is carried out by energizing the interconnected terminals A and A / B, B4 and C and. In this case, the winding is connected into a star with four parallel branches by interconnecting the Ag / A-Bg / A-C g / Ag-Aj / C j-B j / C, -C g / Ct outputs.

When the winding is connected T-shaped with three parallel branches. In this case, the input of phase A is formed by connecting the Ag / Ag-Bft / A –Cg / A leads between them, the input of the phase B is formed by the compound, and the input of phase C is formed by the –Bg / C –Cg / C compound.

At the number of poles, the first, second and third branches of the winding are connected to each other in a triangle, and the beginning of the fourth, fifth and sixth branches are connected to opposite vertices of the triangle, and the connection between them Ag / C-Cg / A-C / B forms an input phase A, compound Bj / A -Cg / C -A4 / B - input phase B, and compound Aj / A -Bg / C - -B4 / Bt - input phase C.

The winding is characterized by simplicity of design, the minimum number of transducers per rotation frequency switch and can be used in multi-speed asynchronous motors with a pole ratio of 4: 3: 2: .1 and the number of grooves z 54.

In the proposed winding, compared with the known one, the number of outputs is reduced by 20% (from 15 known ones to 12), which simplifies the switching equipment, reduces the laboriousness of engine manufacturing and increases the reliability of the electric drive.

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Claims (1)

Invention Formula A three-phase pole-switched winding on the ratio of the numbers of poles 8: 6: 4: 2, containing 12 basic evenly distributed coil groups, each of the even coil groups is made of two concentric coils with steps along the grooves 11 and 5, and each of the odd coil groups is made of two. concentric coils with groove spacing steps 5 coil groups among themselves into 4.5 groove divisions, in which the odd coil groups are connected to each other in two opposite directions in three branches x with sequential numbers 1-7 in the first, 9-3 in the second and 5-11 in the third branches x, and conclusions were drawn from the beginnings, middle and ends of these branches, and even coil groups are interconnected in the fourth, fifth and sixth branches with two coil groups connected in opposite directions in each branch, the sequence numbers of which are 4-10 in the fourth, 12-6 in the fifth and 8-2 in the sixth branch x, with the ends the fourth, fifth, and sixth branches, representing the ends of the coil groups 10,6,2, are connected to the middle of the first, second, and third branches, respectively, and from the beginnings of the fourth, fifth, and sixth branches, conclusions are drawn that In order to reduce the number of winding pins, additional coils, numbered 13,14,15, are arranged concentrically between the two coils of the main even-numbered trunnion groups with numbers 4,8,12, with groove steps 9 and with the number of turns in with a coil, two times smaller, and a copper cross section twice as large as the rest of the winding coils, with coil 13 forming the seventh, coil 14 — eighth, and coil 15 — the ninth branch, which are interconnected by their beginnings, and the ends of the seventh, eighth and ninth branches are connected to the middle, respectively, of the fourth, sixth and fifth branches. 0 0 1453535 Compiled by A. Ketsaris Editor N. Lazarenko Tehred A. Kravchuk Proofreader I. Muska