SU1390721A1 - Three-phase pole-switchable winding for 4-6 poles - Google Patents

Abstract

This invention relates to windings of electrical machines of alternating current. The purpose of the invention is to improve the utilization of active materials No. P 18 J3 2021 / Z 3 Schr by reducing the balancing currents. The winding on 4-6 poles contains 21 coil groups (CG). CGs are grouped into three three-phase stars with conclusions from points of parallel connection of phases and zero points of stars. The alternation of the numbers of coils in the coil groups corresponds to the following series: LC, 1K, 5K, 6K, 5K, 1K, LC, LC, 1K, 5K, 6K, 5K, 1K, LC, LC, 1K, 5K, 6K, 5K, 1K, ZK. in phases (f) of one three-phase star are included KG with sequence numbers 6, 11, 16 - for the first f, 13, 18, 2 - for the second f, 20, 4, 9 - for the third f. v f of the second three-phase star included KG 1,5 - for the first F, 8, 12 - for the second F, 15, 19 - for the third F, V, F of the third three-phase star included KG with numbers 17, 21 - for the first F, 3, 7 - for the second Ф, 10, 14 - for the third F. KG with serial numbers 6, 16, 13, 2, 20, 9, 5, 12, 19, 17, 3, 10 are included in the opposite direction of another KG. 1 il. S & T S 9 Yu P / / J / U / SL with CD O | Yu %

Description

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The invention relates to pole-selectable windings of ac electric machines and can be used in multi-speed asynchronous motors, as well as in special machines, such as frequency converters, machines with an internal cascade, etc.

The purpose of the invention is to improve the use of active materials by reducing equalizing currents.

The drawing shows a diagram of the winding 4 and 6 poles for laying in 72 slots.

In this case , .

The winding contains 21 coil groups, and the alternation of the numbers of coils in the coil groups corresponds to the series: 3,1,5,6,5,1,3,3,1,5,6,5,1,3, 3,1,5 6,5,1,3.

The phases of one three-phase star attached to the zaz: imu 6C include coil groups with numbers 6,11,16 - for phase 4С, -БС,; 13,18,2 - for phase 4С5-6С | 20.4.9 - for 4Сз-6С phase.

The phases of the second three-phase star, attached to the clamp BS, include coil groups with numbers 1.5 - for phase 8.12 - for phase,; 15,19 - for phase 4Сз-6С

The phases of the third three-phase star connected to the clamp 6C include coil groups with numbers 17, 21 for the phase,; 3.7 - for phase 10.14 - for phase 4C3-6Cj. . .

Coil groups with numbers 6,: 16,13,2,20,9,5,12,19,17,3,10 are included in another coil group of the corresponding phases.

Switching poles is carried out according to the scheme.

The magnitude of the differential emf parallel to the nyh branches at about 4%, which is two times less than the magnitude of the differential emf of the known winding.

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A decrease in the magnitude of the differential emf leads to a decrease in the balancing currents in the contours of the parallel branches and an increase in the energy performance of the engine.

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Claims (1)

Invention Formula Three-phase pole-switched winding for 4-6 poles, containing evenly distributed coils, combined into 21 coil groups with serial numbers 1-21 and grouped into three three-phase stars connected in parallel with the series connection of the coil groups in each phase, equipped with leads taken from the points of parallel connection of the phases, and the conclusions taken from the zero points of the stars, characterized in that, in order to improve the use of active materials by reducing the balancing currents, the alternation of cat numbers NIS in coil groups corresponds to the following range: LC, 1K, 5K, 6K, 5K, 1K, LC, LC, 1K, 5K, 6K, 5K, 1K, LC, LC, 1.K, 5K, 6K, 5K, 1K, SQ, the phases of one three-phase star include coil groups with serial numbers 6, 11, 16 for the first phase, 13, 18, 2 for the second phase, 20, 4, 9 for the third phase, the phases of the second three-phase star include 1.5 coil groups for the first phase, 8, 12 for the second phase, 15, 19 for the third phase, coil groups with the numbers 17, 21 for the first phase, 3, 7 are included in the phases of the third three-phase star - for the second phase, 10, 14 - for the third phase, with the coil The numbered groups with serial numbers 6, 16, 13, 2, 20, 9, 5, 12, 19, 17, 3, 10 are included in the opposite coil groups, where, where Z is the number of coils.