SU1457098A1 - Three-phase switchable-pole winding - Google Patents

Abstract

The invention relates to electrical engineering. The purpose of the invention is to expand the field of application of two-speed pole-switching windings by obtaining-numbers of poles with a ratio. In constructive terms, the winding is made of a single-layer of twenty-one concentric coil groups and can be used for mechanized laying of the magnetic core into grooves using the existing technological equipment, which significantly improves the labor intensity of manufacturing. Given the distribution of coils in the grooves. 1 il. with

Description

.one

The invention relates to pole-selectable windings of electric machines of alternating current and can be used in electrical integration in the manufacture and installation of the stator windings of induction electric motors.

The purpose of the invention is to expand the field of application of pole-switched windings by obtaining a ratio of pole numbers 16: 6.

The drawing shows the unfolded winding circuit, made single-layer in 54 slots of the stator with numbers from 1 to 54 and the ratio of the numbers of poles.

The winding consists of 21 concentric coil groups with serial numbers from G to G, the winding contains nine conclusions (A, A, AZ,

AT

3

in tj

 2 d -1 V-J,, ЧJi provides for switching according to the th / LL scheme.

When the terminals A,, BI and C are connected, a rotating magnetic field with the number of poles equal to sixteen arises to the symmetrical power supply of the free terminals A, A ,, B ,, V., C-i and Cz. The switching circuit is a triangle. When the terminals A ,, A and Hell are connected to a symmetrical power supply network and the terminals A, - B, -C ,, and A Bj-Cj closed in three groups, respectively, a rotating magnetic field with a number of poles of six occurs. The commutation circuit is triple triangle.

The winding ratios of the proposed winding are:, 816, K 0.96, K 0.888.

C-f Cj, Cj), which provides

SP

About from 00

GiGa G,

Gp fit Hz

Compiled by A. Ketsaris Editor V. Petrash Tehred L. Oliyyyk Proofreader N. Gunko

Order 7562/54

Circulation 645

VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5

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Claims (1)

Formula of the invention Three-phase pole switchable | winding of a two-speed motor, performed by a single layer in 54 grooves of the stator with numbers from 1 to 54, containing coils unevenly distributed over the coil groups, vol. divided into nine parts forming a closed loop, connected according to and sequentially in ascending order of numbers, equipped with nine conclusions taken from the points of connection of the parts, so that ... and especially with the fact that, with In order to expand the scope of application of pole-switching windings by obtaining the number of poles with the ratio 2p ₁ : 2p _g = 16: 6, the winding is made of 21 coil groups with numbers from G _d to G _g1 , of which six with serial numbers G, G ₃ , G ₈ , T _{/ D,} D ", _n and r beginnings of external coils in the slots with indices 1,8,19,26,37 and 44 respectively are formed by one coil with a step Y = 10 and one coil with a step Υ ° = 8, and 15 coils with serial numbers ^, Γ +, Γ ^ Γ ^, Γ ,, Γ ^ η ,, Γ ^, Γ ,,, Γ ^, ^G and " ^G and" ^G "" ^G g · ^{and and} beginnings in grooves _{10 with} numbers 5,12,13,15,16,23,30,31, 33,34,41,48,49,51 and 52 are formed by coils with a pitch of Υ = 9, and in the first part with clamps A ₁ and A _g included coil groups with serial numbers j ₇ and G ₂ , in the second. part with clamps A ₂ and A ₃ - groups with numbers G ₃ and G _{1 (} , in the third part with clamps A _e -E ₇ - groups with numbers G ₁₉ , G ₂ and G ₆ , in the fourth part with 2θ clamps B. and B _z - T group with numbers ₇₅ and r _ig, in the fifth part of the terminals ^{and in} 2. in the group of ~ g _n and g _and the sixth portion with clamps B ^ -C, -. group g _(, T ₁₆ and G ₂₀ , in the seventh part with clamps 25 C ₍ IC _g - groups G ₈ and G „, in the eighth part with clamps C ₂ and C ₃ - groups T„ and G ₇ , in the ninth part with clamps Cj-A ₁ - groups G ₅ , G ₉ and G _{1 }} , moreover, the 'coil groups with serial numbers Г ₄ , Г ₄ , Г ₇ , Г ₉ , Г _п , Г ₁₄ , Г _и , Г _(< and Г _п are included counter to the rest of the coil groups within the parts.