SU1141517A1 - Versions of m-phase - one-phase combined winding for electric machine - Google Patents

Abstract

1. T-Phase-single-phase combined electric winding with numbers of pairs of poles PT / PJ containing 2 gt of two-layer distributed coil groups with concentric coils and connected into two parallel T-phase stars with t-phase clamps for polarity p and two additional clamps from zero points of stars for polarity p, characterized in that, in order to expand its field of application by obtaining, as well as improving the use of copper, the winding is made in 6t grooves and each group contains three coils, in the first phase The dinenes in succession are counter-coiling groups with numbers 1 and 1 + t, theirs. The outer coils are included in the branch of the first star, the internal coils in the branch of the second star, the middle coils in an additional branch, the beginning of which forms a phase clamp, and its end is connected to the beginnings of the branches star phases, other phases are made similarly from coils of groups shifted into two groups relative to groups of the neighboring phase, with each group of cutouts having outer, middle and inner steps in slots 3, - :; a, - 2 and the number of turns) it o with () W.;. W w. ,, g / (,, e), kv to I KS where m is an odd integer, c / mi (m-2) / m is correct irreducible fraction, .c is an integer, Γ is pole division for polarity p , 1c is an integer number selected from the series AND k (t − 1) / 2, 1c „and kazfitsi (shortening tape for the polarity p of the outer and inner coils. 2. tphase-single-phase combined electric winding with the numbers of pairs of poles p / Pj, containing 2 m of two-layer distributed coil groups with concentric coils: light and connected into two parallel T-phase stars with T-phase clamps for polarity p, and two j additional clamps from zero points for polarity pj, about: in order to expand its scope by student, as well as improving the use of copper, the winding is made in bgp grooves and the group contains three coils, in the first phase are connected in series according to the coils of groups 1 and 1 + t, the external coil of group 1 and the internal group 1 + t are included in the branch of the first star, the inner coil of group 1 and the outer group

Description

1 + m- to the branch of the second star, middle coils of groups - to the additional branch; the beginning of which forms the phase clamp and its end is connected to the beginnings of the star branches of the phase, and the other phases are similarly extracted from the coils of groups shifted into two groups relative to the groups of the adjacent phase, each

a group of coils outer, middle, inner have steps along VH grooves (, + 2, f. 2 r ,,, yg Vc-2, where | is an odd integer number, 2c / m (m-3) / m is a correct irreducible fraction, c) , v is the pole division for P2 polarity, 1 is an integer selected from the row 1 4 1, (t-3) / 2.

The invention relates to windings of electric machines of alternating current and can be used in machines of the combined type.

Known combined electric windings with the numbers of pairs of poles. containing 12 evenly distributed coil groups connected in phases into two parallel branches, the beginnings of which form three-phase clamps for polarity p, and the ends are connected to two additional clamps for polarity p, where P., / P, 1/6 SP.

The disadvantage of such windings is limited application.

The closest to the technical essence of the invention is a combined winding with the numbers of pole pairs 1/3, containing 6p distributed coil groups with concentric coils, connected in two parallel three-phase stars, the beginnings of which form three-phase clamps for polarity p.

i

zero points are two additional terminals for polarity p ,,. Each group is made of three concentric coils connected in two subgroups, with the first group including the first subgroups in one star, and the second subgroups of the corresponding groups of phase C21 in one star

A disadvantage of the known winding lies in the limited scope.

The purpose of the invention is to expand the field of application by obtaining or 2c / t, as well as improving the use of copper by increasing the winding ratio for

poles of PJ, where. m is the number of phases of the winding for polarity P-, equal to an odd integer number, -a s / t and 2s / correct irreducible fractions.

5 - This goal is achieved by the fact that in r-phase-single-phase combined electric winding with the numbers of pairs of poles containing 2 tons of two-layer distributed coil groups with concentric coils and connected into two parallel t-phase stars with m-phase-sh clamps for polarity p and two additional clamps from zero points of the star's check for poles, for po. The c / np winding is made in 6 m slots and each group contains three coils, in the first phase the coils of the groups with numbers 1 and 1 + t are connected in series so that their outer coils are included in the branch of the first star, the internal ones are in the branch the second star, medium - in the additional branch, the beginning of which

5 forms a phase clamp, and its end is connected to the beginning of the star branches of the phase. , other phases are made similarly from coils of groups shifted by two groups relative to groups of the neighboring phase,

30, with each group of outer, middle, and inner coils having groove steps, s-2-2 in if.-2K number of turns) in / (Vy + K. ,,, t, / (K, «4. KvB), 5 where tn7 / 3 is an odd integer,

c) t (t-2) / m - a fraction is irreducible, c is an integer, 2-pole division for polarity p, 1s is an integer selected from the row

40 1 (1) / 2, and / i, (shortening g-factors for polarity p of the outer and inner coils. To obtain 2c / m, the winding is made in 6t grooves and each group contains three coils; in the first phase, they are connected in series according to coil groups with numbers 1 and 1 + t so that the outer coil of group 1 and the inner group 1 + t are included in the branch of the first star, the inner coil of group 1 and the outer group. 1 + t in the branch of the second star, the middle coils of the groups in the additional branch , the beginning of which forms a phase clamp and its end is connected to the beginnings of the branches of the stars of the phase, and other phases are made similarly from coils of groups displaced into two groups relative to groups of the neighboring phase, and in each group of coils detected, middle, internal, have steps along grooves n –c,, -2, where the integer is an odd number, 2s / t4 (t - 3) / rm1 is a correct fraction irreducible, with an integer, tj is a pole division for pj polarity, 1 is an integer selected from the series 1 ki (m-3) / 2. Fig. 1 shows the unfolded diagram of the proposed winding 1 & 1 / five; in fig. 2 - EMF star of winding groups for polarity p, 1; in fig. 3 - EMF diagram of the winding phases for polarity p 1; in fig. 4 is the same for poles 5; in fig. 5 - 7 - Td same as in FIG. 1 - 3 but dl (and Pt / p2 3/5;. On fig. 8 - 11 the same as in fig. 1 - 4, but dl and 2/5. Winding (fig. 1, 5 and 8) A two-layer and 5-phase of distributed coil groups (with dimensions from 1 to 10) are made in the grooves and each group contains three concentric coils. The winding is connected to two tons of 5-phase parallel stars p. 1n with 5-phase clamps A, B, C, D, E for polarity p and two additional clamps 01 and 0-2 from the zero points of the stars (Fig. 3, 7 and 10) for polarity p,. The middle roll of each group has a groove spacing (. pole division for 2 2 pole p, and the value of k is chosen from row 1ik (rn-1) / 2 from the condition of obtaining the maximum winding factor for the polarity of the river. For the winding in Fig. 1, having p, / p 1/5, outer, middle, inner coils have groove steps, (T -2 30 / 2p. In phase A, coils of groups 1 are connected in series and opposite, so that their outer coils are included in the branch of the first star, internal - in the branch of the second star, medium - in an additional branch, the beginning of which forms a clamp of phase A and its the end is connected to the beginnings of the star branches of the phase. For other phases, the group numbers alternate with an interval of two groups: for phase B, groups 3 and 8, for phase C, groups 5 and 10, for phase D, groups 7 and 2, for phase E, groups 9 and 4. , the average internal coils of the group are: for the polarity P | i, 1 K. ,, 9945, к ,, с 0.9511, 0.866, for the polarity 0.866, О, 0, 0866. The middle coil of each group is derived from the circuit for a polarity of p 5, which increases the winding coefficient of the winding for this polarity, equal to. The emf of the star branches of the phase for polarity ρ is equal to each other when the condition η (/ (1-x) K (1 + x) K., e, whence / (K ,, + Kyg) and W 2К ,, „/ Tsn K,), where, W, w, - the number of turns of the coils outer, middle, inner. For winding in FIG. 1 we have, 931 W and 1.069 W. In separate winding slots. 1 (and FIGS. 5, 8) are located the sides of the coils: inner with outer, middle with medium, outer with inner, i.e. all the grooves have the same number of turns equal to 2. The winding coefficient of the winding in FIG. 1 for polarity Рд is equal to “05 ,, ,, (,,) J / 3 0.9427. On the EMF stars of the winding group for polarity p (Figs. 2, 6, and 9), the group number is assigned to the EMF vectors. On the EMF diagrams (FIGS. 3, 4, 7, 16, and 11) i, the EMF vectors of the medium coils are assigned a pear number, the outer one is the group number with one stroke, the inner one is the group number with two strokes. From the EMF diagram of phases for polarity p (Figs. 3, 7, and 10) it can be seen that a 5-phase alternating field with pole polarity p at terminals 01 and 02 does not induce EMF; From the EMF diagram for P2 5 polarity (Fig. 4 and 11) it can be seen that a single-phase pale with a p 5 polarity at the terminals of phases A, B, C, D, E also does not induce an EMF. Thus, before .511, the winding is equivalent to two non-dependent windings: T-phase Zp -nail and single-phase 2p2 2t-pole. The arrows in FIG. 1 (Figs. 5 and 8) shows the directions of the currents during the supply of the winding through the clamps 01 and 02 with a single-phase current (p 5). For the winding of FIG. 5, having P;, / P, 3/5, the groove steps of the coils are equal. -CU 2, VB 4 and the connections are made the same as for the winding of FIG. 1. The shortening coefficients of the coils are: for the pole polarity -Kv "0.5878, K ,,, 9511, K ,, e 0.9511 and, 876, for the polarity p, 5 - 0.866, O, 0.866 and .966. The number of turns of the coils, defined similarly to the previous one, is W |, 1,, 764W. The EMF diagram for the polarity p of the winding of FIG. 5 is the same as in FIG. 4. For the winding of Figure 8, the steps of the coils are equal,,. In phase A, they are connected successively according to (Fig. 9) the coils of groups 1 and so that the outer coil of group 1 and inner group 6 is included in the branch of the first star, inside, nn the coil of group 1 and the outer group 6 in the branch of the second star V. The middle coils of groups 1 and 6 are in an additional branch, the beginning of which forms the clamp of phase A and its end is connected to the beginnings of the branches of the stars of the phase. The other phases are similar and have the same numbers as the windings 76 of FIG. 1 and 5. The shortening coefficients of the coils are: for pole positions, 9945,, 951U К 0.7431, for the same values as for the winding of FIG. 5. The number of turns of all the coils are equal to W. The winding ratio for p 2 is: Ko5-, C2K., C + (K.,) / 2j / 3 Q, 9237. Similar to the above schemes, windings are carried out according to the proposed schemes and with other values of the number of phases (m is an odd number). For example, when in 2w 14 groups and 6 slots we get: for p / p 1/7 and for p, / p, 4 / 7-1 2 for p / pj 3/7-k 1 .and for,. and. for p / p 5 / 7-1 2 and. The proposed winding, in comparison with the known one, has an extended scope and, moreover, much better use of copper due to the greater product. It can be used, for example, on the stator of single-machine frequency converters and the number of phases, on the stator of multiphase synchronous generators with an excitation system from higher harmonics, the floor, on the rotor of contactless synchronous machines with a combined pathogen and rotating meters, and in other electromachine and electromagnetic devices with two combined pa nopolyucny sIi magnetic fields.

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Claims (1)

1 .t-Phase-single-phase combined electromachine winding with the number of pairs of poles r _p / p ₂ containing 2 m two-layer distributed coil groups with concentric coils and connected in two parallel m-phase stars with t-phase clamps for polarization p _p and two additional clamps from the zero points of the stars for the polarity p ₂ , characterized in that, in order to expand its scope by obtaining p ₁ / p ₁ = s / t, as well as improving the use of copper, the winding is made in 6t grooves and each group contains three coils in the first AZE opposite coils are connected in series groups with numbers 1 and 1 + t, their outer coils are included in the branch of the first star, the inner ones are in the branch of the second star, the middle ones are in the additional branch, the beginning of which forms a phase clamp, and its end is connected to the beginnings of the branches of the star phase, other phases are performed