SU756545A1 - Three-phase pole-switchable winding - Google Patents

Description

The invention relates to electrical engineering and can be used to create multi-speed engines. five

Known winding 14-4-2 pole three-phase, two-layer, consisting of coil groups with a whole number of coils. In the known winding, the coils are distributed in the grooves in the sequence Ϊ + 3Ε, where ΐ ~ the phase number, E is an integer 0 ά ι 6 -1,

Ζ is the number of slots. In total, such a winding contains, in phase, 28 coils, united in 2 · поп groups, included in-. belt agrees and counter and consisting of 28 / p; according to the included adjacent coils of this phase, where p · is the number of pole pairs corresponding to the ίth switch. 20

The disadvantage of the winding is that it can be performed only with 84 slots on the stator, which limits its scope.

Also known pole switch - 25

The winding is three-phase, two-layer, consisting of identical coils, distributed in grooves, the numbers of which are determined from the expression

= ϊ + 3ΐ, where 5b is the slot number, in κοζ

the torus is the E th coil of the ϊ-th phase,

Ϊ is the phase number, E is an integer,

0 ί e 6 - 1, Ζ is the number of slots [2].

In this winding to ensure its application with a fractional number of grooves per pole and phase, the number of coils that make up the group is determined by the numbers of a certain interval. Neighboring groups in phase are interconnected.

Analysis of the known winding shows that, for example, when 2p = 14 and Ζ = 24, 1,4,7, 10,13,16,19,22 coils or coil groups enter the first phase (for Ζ = 24 they are the same ). But it is known that with counter connections of 8 coil groups in phase, only 8 poles can be obtained, but not 14,

Also known is a three-phase pole-switchable winding containing 24 coil groups, with the inclusion in the phase of coil groups, the numbers of which are determined in accordance with the series 3 — 7, 8ϊ-5, 8! +2, 8! +5, 8: +7, 8Ϊ + 12, 81 + 14, with a counter-connection between each other 8ϊ + 12 and 81 + 14 coil groups, with output from 8Ϊ-7 coil groups, where ΐ is the phase number [3].

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756545

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The disadvantage of this winding is the limited scope because ^: it cannot provide switching to three numbers of pole pairs with a ratio of 14: 4: 2.

The purpose of the invention is the expansion of the scope.

This goal is achieved by the fact that the coil groups in phase are interconnected oppositely in the following sequence: 81-7 with 8ί + 2, 81 + 2 with 85 + 7, 81 + 7 with 81 + 12, 81 + 14 with 81 + 5, 81 + 5 with 81, 81 with 81-5, with additional conclusions taken from the 81-5 coil group and from the connection points 8 with 81 + 5, 8ΐ + 2 with 81 + 7, 81 + 12 with 81 + 14 coil groups .

FIG. 1 shows the scheme of the winding, nafig. 2 is a simplified connection diagram of the coil groups in phase.

The winding consists of 24 coil groups 1-24 and has 15 terminals A} ',

A 2., A ₃ , Hell, A ^ -, B _1G B ₂ ,

С *, С _g , С _ъ , Сд, С ₅ , which allow to carry out various schemes of interface of phases.

Phase (see Fig.2) is formed by the opposite inclusion between 8 coil groups. In the following sequence: 8ΐ-7, 8ΐ + 2, 8ϊ + 7, 81 + 12, 81 + 14, 81 + 5, 81, 85 - 5 For the first phase (ι = 1) these are 1,10,15,20,22,13,8 and 3 coil groups. Conclusions are taken from 8Ϊ-5, 8ΐ — 7 and from connection points 8ϊ with 85 + 5,

81 + 12 p.81 + 14 and 8ί + 2 p.81 + 7 coil groups.

Applying voltage to the terminals A ₁ and A 2 (B ₁ and B ₂ , ϋί and C ₂ ), we get 2p = 14. If the voltage is applied to the terminals A _a and A ^ (B ₃ and B ₄ , Cd and Cd), and the output A _{4 is} connected to the output A _g (B | c B ₂ , C c c c ₂ ), we get 2p = 8. At. by applying the voltage to the combined outputs A * and A ₂ and the output A5 (Bp B ^ n to ₅ ; C _1G C2 and C _£ ) we get 2p = 4. By applying voltage to the combined pins A, A ₂ , A _? and A ₃ , Hell (B {, B ₂ , Wu and A ₃ , Hell, Cd, C ₂ , C ₃ and C ₃ , Cd), we get 2p = 2. To improve the harmonic composition of the magnetizing force at 2p = 14 and balancing the electromotive forces of parallel branches at 2p = 2, the number of turns in 1,2,5,6, 9,10,13,14,17,18,21 and 22 coil groups should be less than the rest.

Engines with the proposed winding can be used to drive machines and mechanisms with adjustable performance.

Claims (1)

Claim Three-phase pole-switching winding containing 24 coil groups, with the inclusion in the phase coil groups, the numbers of which are determined in accordance with a number of 81-7, 85-5, 81 + 2, 81 + 5, 81 + 7, 85 + 12, 81 + 14, with a counter-coupling between them 81 + 12 and 8Ϊ + 14 coil groups, with output from 81-7 coil groups, characterized in that in order to expand the field of application, the coil groups in the phase are interconnected in opposite order in the following sequence: 8ΐ — 7 s 85 + 2, 81 + 2 s.81 + 7, 81 + 7 s 81 + 12, 81 + 14 s 81 + 5, 8ΐ + 5 with 81, 8ΐ with 8ΐ-5, with additional conclusions taken from 85–5 of the coil group and from the connection points 8 I С 81 + 5, 81 + 2 with 85 + 7, 85 + 12 with 8 +14 coil groups, where ί is the number of the corresponding phase.