Winding of stator of three-phase alternating-current electric machines

IPC classes for russian patent Winding of stator of three-phase alternating-current electric machines (RU 2508593):

H02K3/28 - Layout of windings or of connections between windings (windings for pole-changing H02K0017060000, H02K0017140000, H02K0019120000, H02K0019320000)

Another patents in same IPC classes:

Low noise induction motor / 2507664

Low noise induction motor comprises two mutually dependent combined windings, one of which is assembled as "star", and the second one - as "delta". These windings are laid into slots so that resulting vectors of induction of magnetic flows of pole pairs in identical phases of "star" and "delta" form an angle of 30 el. degrees between each other.

Autonomous induction generator with bipolar stator winding / 2498483

In the suggested autonomous asynchronous generator bipolar stator winding including twelve coil groups consists of a triangle scheme formed by the second and eighth, fourth and tenth, sixth and twelfth coils groups with the first, second and third outputs to which excitation capacitors are connected and star scheme formed by the first and seventh, third and tenth, fifth and eleventh coil groups with the fourth, Fifth, sixth and seventh outputs; at that the first output is taken from the beginning of united beginnings of the second and twelfth coil groups; the second output - from united beginnings of the fourth and sixth coil groups; the third output - from united beginnings of the eighth and tenth coil group; the fourth output - from beginning of the first coil group; the fifth output - from beginning of the fifth coil group; the sixth output - from united beginnings of the third, seventh and eleventh coil group; the seventh output - from beginning of the ninth coil group. The end of the first coil group is connected to the end of the seventh coil group; the end of the second coil group is connected to the end of the eighth one; end of the third coil group is connected to the end of the ninth one; end of the fourth coil group - with the end of the tenth one; end of the fifth coil group - with the end of eleventh one; end of the sixth coil group is connected to the end of the twelfth coil group; additionally, the first, second and third outputs of the triangle scheme and the fourth, fifth and seventh outputs of the star scheme are interconnected in pairs by compensation capacitors connected in-series and common points of these capacitors connection have outputs to connect load to the generator.

Six-phase winding of alternating current machine / 2498481

According to this invention winding of alternating current machine with fractional number of slots Q per a pole and phase (both for Q> 1 and Q< 1) is made as per scheme "two stars under 30 el. degrees", with denominator C corresponding to the relationship C = 6·k ± 1, where k = 1, 3, 5 ….

Four-pole stator winding of asynchronous generator / 2486655

In double-pole stator winding of asynchronous generator consisting of 12 coil groups the end of the 1^st coil group is connected to beginning of the 7^th one; the end of the 8^th coil group is connected to beginning of the 2^nd one; the end of the 3^rd coil group is connected to beginning of the 9^th one; the end of the 10^th coil group is connected to beginning of the 4^th one; the end of the 5^th coil group is connected to beginning of the 11^th one; the end of the 12^th coil group is connected to beginning of the 6^th one; outputs are taken from the joined end of the 7^th group and beginning of the 8^th one; from the joined end of the 9^th group and beginning of the 10^th one; from the joined end of the 11^th group and beginning of the 12^th one; from the joined end of the 4^th group and beginning of the 1^st one; from the joined end of the 6^th group and beginning of the 3^rd one; from the joined end of the 2^nd group and beginning of the 5^th one.

Four-pole stator winding of asynchronous generator / 2486654

In double-pole stator winding of asynchronous generator consisting of 12 coil groups the end of the 1^st coil group is connected to beginning of the 7^th one; the end of the 8^th coil group is connected to beginning of the 2^nd one; the end of the 3^rd coil group is connected to beginning of the 9^th one; the end of the 10^th coil group is connected to beginning of the 4^th one; the end of the 5^th coil group is connected to beginning of the 11^th one; the end of the 12^th coil group is connected to beginning of the 6^th one. Outputs are taken from the joined end of the 6^th group and beginning of the 1^st one; from the joined end of the 2^nd group and beginning of the 3^rd one; from the joined end of the 4^th group and beginning of the 5^th one; from the joined end of the 2^nd group and beginning of the 3^rd one; from the joined end of the 7^th group and beginning of the 8^th one; from the joined end of the 9^th group and beginning of the 11^th one.

Electric machine, in particular, three-phase asynchronous hydrogenerator / 2483413

Invention relates to design of electric machines, in particular, a three-phase asynchronous hydrogenerator with a rotor and a stator, and also with a winding comprising multiple winding rods (17, 18) stretching in axial direction, lying above each other in appropriate slots of the yoke winding, besides, winding rods (17, 18) protrude from the winding slots at the ends of the machine and in the front part (13 a, b) of the winding according to the specified circuit are multiply pairwise electrically connected to each other, besides, the upper rod (18) of the winding of the first winding slot and accordingly the second rod (17) of the second winding slot is therefore bent to each other, so that their ends (21, 22) in axial direction cross above each other, and the connection (16) of the winding rods (17, 18) of the electrically connected pair of winding rods is carried out with the help of a solid connection element (27). At the same time, according to this invention, the ends of electrically connected to each other winding rods (17, 18) the windings are made as straight tabs (21, 22) of rectangular section, and the connection element is made as a round eyelet (27) aligned in the radial direction, having two radially crossing above each other support surfaces (28, 29) for arrangement of on the tabs (21, 22) of the winding rods (17, 18) connected with each other.

Stator winding of welding asynchronous generator / 2476976

Stator winding of a welding asynchronous generator comprises twelve coil groups with leads and connection of the end of the second coil group with the end of the eighth coil group, the end of the fourth coil group with the end of the tenth coil group, the end of the sixth coil group with the end of the twelfth coil group and excitation capacitors differing by the fact that the first lead of the winding is taken from the start of the twelfth coil group, the second lead of the winding is taken from combined starts of the first, sixth and eleventh coil groups, the third lead of the winding is taken from the start of the eighth coil group, the fourth lead of the winding is taken from combined starts of the second, seventh and ninth coil groups, the fifth lead of the winding is taken from the start of the fourth coil group, the sixth lead of the winding is taken from combined starts of the third, fifth and tenth coil groups, at the same time the end of the first coil group is connected with the end of the seventh coil group, the end of the third coil group is connected with the end of the tenth coil group, the end of the fifth coil group is connected with the end of the eleventh coil group, the end of the second coil group is connected with the end of the eighth coil group, the end of the fourth coil group is connected with the end of the tenth coil group, the end of the sixth coil group is connected with the end of the twelfth coil group, the first, second and third excitation capacitors are connected with leads by the first, third and fifth winding leads, and the three-phase rectifier is connected with the second, fourth and sixth leads of the stator winding.

Dipolar stator winding of asynchronous generator / 2475927

Dipolar stator winding of an asynchronous generator consists of twelve spool groups and excitation capacitors; the end of the first spool group is connected to the end of the seventh spool group, the beginning of the second one - to the beginning of the eighth one, the end of the third spool group - to the end of the ninth spool group, the beginning of the fourth spool group - to the beginning of the tenth spool group, the end of the eleventh spool group - to the end of the fifth spool group, the beginning of the twelfth spool group - to the beginning of the sixth spool group; the winding first output is taken from the conjoined end of the tenth spool group and beginning of the first one, the winding second output - from the conjoined beginning of the seventh spool group and end of the eighth one, the winding third output - from the conjoined end of the second spool group and beginning of the fifth one, the winding fourth output - from the conjoined beginning of the eleventh spool group and end of the twelfth one, the winding fifth output - from the conjoined end of the sixth spool group and beginning of the ninth one, the winding sixth output - from the conjoined beginning of the third spool group and end of the fourth one; the first, second and third excitation capacitors are connected to the winding first, third and fifth outputs.

Four-pole stator winding of asynchronous electric machine / 2472273

Four-pole stator winding of an asynchronous electric machine comprises 12 coil groups, at the same time the end 1 of the coil group is connected with the start 7, the end 7 - with the start 8, the end 8 - with the start 2, the end 3 - with the start 9, the end 9 - with the start 10, the end 10 - with the start 4, the end 5 - with the start 11, the end 11 - with the start 12, the end 12 - with the start 6, leads are taken from the start 1, from the start 3, from the start 5, from the end 2, from the end 4, from the end 6, from coil groups of combined end 7 and start 8, from combined end 9 and start 10 of coil groups, from combined end 10 and start 12 of coil groups.

Six-pole stator winding of inductor motor / 2470445

Invention is related to the sphere of electric equipment and may be used in production of multifunctional induction electric machines. A six-pole stator winding of an induction motor comprises 18 coil groups, at the same time the end of the coil group 1 is connected to the beginning of the group 7, the end of the group 7 - to the beginning of the group 13, the end of the group 13 - with the beginning of the group 14, the end of the group 14 - with the beginning of the group 8, the end of the group 8 - with the beginning of the group 2, the end of the group 3 - with the beginning of the group 9, the end of the group 9 with the beginning of the group 15, the end of the group 15 - with the beginning of the group 16, the end of the group 16 - with the beginning of the group 10, the end of the group 10 - with the beginning of the group 4, the end of the group 5 - with the beginning of the group 11, the end of the group 11 - with the beginning of the group 17, the end of the group 17 - with the beginning of the group 18, the end of the group 18 - with the beginning of the group 12, the end of the group 12 - with the beginning of the group 6, outputs (19 - 24) are taken from the combined end of the group 17 and the beginning of the coil group 18, from the combined beginning of the group 1 and the end of the coil group 4, from the combined beginning of the group 3 and the end of the coil group 6, from the combined beginning of the group 5 and the end of the coil group 2, from the combined beginning of the group 14 and the end of the coil group 13, from the combined beginning of the group 16 and end of the coil groups 15.

Stator winding of dual-speed induction generator / 2248082

Proposed stator winding has 24 coil groups and field capacitors. Finishing lead of coil group 8i + 5 is connected to starting lead of coil group 8i + 8; finishing lead of coil group 8i + 8, to finishing lead of coil group 8i + 15; starting lead of coil group (8i + 15), to finishing lead of 8i + 18. Starting leads of coil groups 8i + 18 are interconnected at neutral point. Starting lead of coil group 8i - 7 is connected to finishing lead of coil group 8i - 4; starting lead of coil group 8i - 4, to starting lead of coil group 8i + 3, finishing lead of coil group 8i + 3, to starting lead of coil group 8i + 6. First phase leads are formed from finishing leads of coil groups 8i - 7, second phase leads, from interconnected starting lead of coil group 8i + 5 and finishing lead of coil group 8i + 6, where i = 1, 2, 3, number 24 being subtracted from that higher than 24. Windings are connected in star or in star-star whose leads are connected to field capacitors and load for different current frequencies. Such winding design makes it possible to produce off-line power supplies for different current frequencies and same voltage at fixed speed of drive motor.

Stator winding of dual-speed induction generator / 2248083

Proposed stator winding has six pairs of concentrically disposed variable-pitch coil groups with single-layer coils of external coil groups and double-layer ones of internal coil groups. Connected in first phase are first and fourth pairs of coil groups, in second phase, third and sixth coil groups, in third phase, fifth and second coil groups. Differentially connected in each phase are variable-pitch coil groups of different pairs. Starting leads of internal coil groups of first, third, and fifth pairs are interconnected at neutral point. Phase leads are formed by finishing leads of coil groups of first, third, and fifth pairs. Additional phase leads are formed from interconnected starting leads of external coil groups and finishing leads of internal ones of fourth, sixth, and second pairs connected in star or star-star; field capacitors are connected to phase leads in compliance with generator load. Proposed design of this winding makes it possible to produce power supplies for different current frequencies at same voltage and same speed of drive motor.

Composite stator winding of induction generator / 2249289

Proposed stator winding has 18 coil groups. Finishing leads of coil groups k and (k + 9), where k = 1, 2, 3 through 9, are paired. Phase leads are taken from starting leads of coil groups 3, 9, 15 and constitute star connection; Additional phase leads constituting delta connection are formed from starting leads of coil groups 4, 6, 8, from integrated starting leads of coil groups 10, 12, 14, from integrated starting leads of coil groups 16, 18, 2, from integrated starting leads of coil groups 5, 7, from integrated starting leads of coil groups 11, 13, and from integrated starting leads of coil groups 17, 1. Field capacitors are connected to phase leads in compliance with desired power supply conditions of load. Such design of proposed winding makes it possible to obtain different voltages across generator output at fixed speed of drive motor.

Composite stator winding of induction generator / 2249290

Proposed composite stator winding has 18 coil groups. Finishing lead of coil group 1 is connected to starting lead of coil group 10; finishing lead of coil group 3, to starting lead of coil group 12; finishing lead of coil group 5, to starting lead of coil group 14; finishing lead of coil group 7, to starting lead of coil group 16; finishing lead of coil group 9, to starting lead of coil group 18; finishing lead of coil group 11, to starting lead of coil group 2; finishing lead of coil group 13, to starting lead of coil group 4; finishing lead of coil group 15, to starting lead of coil group 6; finishing lead of coil group 17, to starting lead of coil group 8. Star constituting leads are taken from starting leads of coil groups 3, 9, and 15. Additional delta-constituting leads are taken from integrated finishing leads of coil groups 4, 6, 8, from integrated finishing leads of coil groups 10, 12, 14, and from integrated finishing leads of coil groups 16, 18, 2; from integrated starting leads of coil groups 5, 7, from integrated starting leads of coil groups 11, 13, and from integrated starting leads of coil groups 17, 1. Field capacitors are connected to winding star or delta depending on desired voltage across generator output. In this way different voltages can be obtained across generator output at constant speed of drive motor.

Multifunction stator winding of induction generator / 2249291

Proposed stator winding has six concentrically disposed pairs of different-pitch coil groups with single-layer coils of external groups and double-layer ones of internal groups. Coil groups of pairs 1 and 4 are included in first phase, those of pairs 3 and 6, in second phase, and coil groups of pairs 5 and 2, in third phase. Different-pitch coil groups of different pairs are differentially connected in each phase. First phase leads are taken from finishing leads of external coil groups of pairs 1, 3, 5. Second phase leads are formed by integrated starting leads of external coil groups and from finishing leads of internal coil groups of pairs 4, 6, 2. Connected to starting leads of internal coil groups of pairs 1,3, 5 is additional eight-pole low-voltage winding; field capacitors and main load are connected to first and second phase leads. Such design of stator winding makes it possible to build off-line power supplies for different current frequencies at different voltages around capacitor-excited induction generators with drive motor rotating at fixed speed.

Composite stator winding of induction generator / 2249292

Composite stator winding of induction generator designed to build off-line power supplies for different output voltages at forced rotor speed has 36 coils. Finishing lead of coil 1 is connected to that of coil 4; starting lead of coil 4, to finishing lead of coil 19; starting lead of coil 19, to that of coil, 22; finishing lead of coil 5, to that of coil 8; starting lead of coil 8, to finishing lead of coil 23; starting lead of coil 23, to that of coil 26; finishing lead of coil 9, to that of coil 12; starting lead of coil 12, to finishing lead of coil 27; starting lead of coil 27, to that of coil 30; finishing lead of coil 13, to that of coil 16; starting lead of coil 16, to finishing lead of coil 31; starting lead of coil 31, to that of coil 34; finishing lead of coil 17, to that of coil 20; starting lead of coil 20, to finishing lead of coil 35; starting lead of coil 35, to that of coil 2; finishing lead of coil 21, to that of coil 24; starting lead of coil 24, to finishing lead of coil 3; starting lead of coil 3, to that of coil 6; finishing lead of coil 25, to that of coil 28; starting lead of coil 28, to finishing lead of coil 7; starting lead of coil 7, to that of coil 10; finishing lead of coil 29, to that of coil 32; starting lead of coil 32, to finishing lead of coil 11; starting lead of coil 11, to that of coil 14; finishing lead of coil 33, to that of coil 36; starting lead of coil 36, to finishing lead of coil 15; starting lead of coil 15, to that of coil 18. First phase leads are formed by starting leads of coils 5, 17, and 29. Second phase leads are formed by integrated finishing leads of coils 22, 26, and 30, by integrated finishing leads of coils 34, 2, and 6, and by integrated finishing leads of coils 10, 14, and 18. Third phase leads are formed by integrated starting leads of coils 9 and 13, by integrated starting leads of coils 21 and 25, and by integrated starting leads of coils 33 and 1. Generator also has field capacitors connected to any phase leads in compliance with desired output voltage of generator.

Stator winding of dual-speed induction generator / 2249900

Proposed multifunctional stator winding has 24 coil groups. Finishing lead of coil group (8i +5) is connected to starting lead of coil group (8i + 8); finishing lead of the latter is connected to finishing lead of coil group (8i + 15) whose starting lead is connected to finishing lead of coil group (8i + 8). Starting lead of coil group (8i + 7) is connected to finishing lead of coil group (8i + 4) whose starting lead is connected to starting lead of coil group (8i + 3) and finishing lead of the latter, to starting lead of group (8i + 6). First phase leads are formed by finishing leads of coil groups (i - 7). Second phase leads of main winding are formed of interconnected starting lead of group (8i + 5) and finishing lead of group (8i + 6). Third leads are formed of starting lead of coil groups (8i + 18) with additional sixteen-pole winding connected to them (i = 1, 2, 3, number 24 being subtracted from number greater than 24).Main winding uses star or star-star connection and is connected to load and to field capacitor; low-voltage load is connected to third phase leads. Such design of winding makes it possible to produce off-line power supplies for different current frequencies and voltages at constant speed.

Composite stator winding of induction generator / 2249901

Proposed winding has thirty six coils. Finishing lead of coil 1 is connected to finishing lead of coil 6 whose starting lead is connected to starting lead of coil 19; finishing lead of the latter is connected to finishing lead of coil 24. Finishing lead of coil 5 is connected to finishing lead of coil 10 whose starting lead is connected to starting lead of coil 23; finishing lead of the latter is connected to finishing lead of coil 28. Finishing lead of coil 9 is connected to finishing lead of coil 14 whose starting lead is connected to starting lead of coil 27; finishing lead of the latter is connected to finishing lead of coil 32. Finishing lead of coil 13 is connected to finishing lead of coil 18 whose starting lead is connected to starting lead of coil 31, finishing lead of the latter is connected to finishing lead of coil 36. Finishing lead of coil 17 is connected to finishing lead of coil 22 whose starting lead is connected to starting lead of coil 35; finishing lead of the latter is connected to finishing lead of coil 4. Finishing lead of coil 21 is connected to finishing lead of coil 26 whose starting lead is connected to starting lead of coil 3; finishing lead of the latter is connected to finishing lead of coil 8. Finishing lead of coil 25 is connected to finishing lead of coil 30 whose starting lead is connected to starting lead of coil 7; finishing lead of the latter is connected to finishing lead of coil 12. Finishing lead of coil 29 is connected to finishing lead of coil 34 whose starting lead is connected to starting lead of coil 11; finishing lead of the latter is connected to finishing lead of coil 16. Finishing lead of coil 33 is connected to finishing lead of coil 2 whose starting lead is connected to starting lead of coil 15; finishing lead of the latter is connected to finishing lead of coil 20. First phase leads run from starting leads of coils 5, 17, and 29. Second phase leads are brought out from interconnected starting leads of coils 24, 28, 32, from interconnected starting leads of coils 36. 4, 6, and from interconnected starting leads of coils 12, 16, 20. Third phase leads are formed from interconnected starting leads of coils 9 and 13, from interconnected starting leads of coils 21 and 25, and from interconnected starting leads of coils 33 and 1. Field capacitors are connected to first and second phase leads and load, to first, second and first phase leads in any combination. Such design of this winding makes it possible for generator to produce different output voltages.

Multifunction stator winding of induction generator / 2249902

Proposed multifunction winding has twelve pairs of concentric single-layer internal coils and double-layer external ones in each pair; first phase includes pairs 1, 4, 7, 10; second phase has pairs 3, 6, 9, 12; third phase has pairs 5, 8, 11, 2; single- and double-layer coils of different phases are differentially connected in phase. First phase leads are formed by starting leads of single-layer coils of pairs 1, 3, 5. Second phase leads are formed by interconnected starting leads of double-layer coils and finishing leads of single-layer ones of pairs 2, 10, 12. Third leads are formed by finishing leads of double-layer coils of pairs 1, 3, 5 and connected to additional twelve-pole winding. Main winding uses star or star-star connection and its leads are connected to load and to field capacitors; low-voltage load is connected to third leads. Such arrangement of winding makes it possible to build off-line power supplies for different current frequencies and voltages around capacitor-excited induction generators at constant speed of drive motor.

Stator winding of dual-speed induction generator / 2249903

Proposed stator winding has twelve pairs of concentrically disposed external single-layer coils and internal double layer coils in each pair, first phase including pairs 1, 4, 7, 10, second phase, pairs 3, 6, 9, 12, and third phase, pairs 5, 8, 11, 2 ; single- and double-layer coils of different pairs are differentially connected in each phase. First phase leads are taken from starting leads of single-layer coils of pairs 1, 3, 5. Second phase leads are formed from interconnected starting leads of double-layer coils and finishing leads of single-layer coils of pairs 2, 10, 12. Finishing leads of double-layer coils of pairs 1, 3, 5 form neutral point. Winding uses star or star-star connection and is connected to load and to field capacitors for different current frequency. Such design of winding makes it possible to build off-line power supplies for different current frequency at constant speed of drive motor.

FIELD: electricity.

SUBSTANCE: stator winding includes three single-phase windings formed with equal number of coils arranged in slots. Coils are connected to each other as per equal schemed providing spatial displacement of axes of windings through 120 degrees. Each of the single-phase windings throughout double pole division of the stator is formed with 2Z/2pm coils that include Z/2pm groups with similar number of coils in groups. Each of the groups of coils has different width of coils included into it and different number of turns forming coils in comparison to other groups of coils. Besides, coils of one of the groups have minimum width with minimum number of turns. Width and number of coil turns of every next group have different width and number of coil turns of the previous group. Coils with larger width and larger number of turns are arranged concentrically relative to coils with minimum width and minimum number of turns. Some parts of the volume of slots, which remain free after laying of coils of this single-phase windings, are used for arrangement of coils of two other single-phase windings that are made in a similar way.

EFFECT: weakening upper spatial harmonics of a magnetic field; approximation of distribution of a magnetic field in the gap of machines to a sine one.

4 dwg, 4 tbl

The stator winding of three-phase electrical AC machines

The invention relates to the field of electrical engineering, in particular to the windings of stators of electrical machines three-phase alternating current and can be used in the production of synchronous generators, synchronous and asynchronous motors.

Known schemes single-layer concentric winding of stators of electrical machines three-phase AC / VI Zimin, MA Kaplan and other Windings of electrical machines. Ed. fifth, revised: state energy publisher: M. - L. 1961, pp.118-123 /. These windings consist of three single-phase windings, the axis of which is shifted in space relative to each other by 120 degrees. Each of the phase windings during a double pole dividing the stator formed by the coils, the number of which is determined by the formula Z/2pm, where Z is the number of slots of the stator, 2p is the number of poles of the machine, m is the number of stator phases. Coils have different width, but the same number of turns. The active side of these coils for pole dividing posted in Z/2pm adjacent grooves and completely fill the entire volume of these grooves.

The disadvantage of three-phase single-layer concentric winding is that along with the main harmonic magnetomotive force (MMF) and the magnetic flux he shall create a wide range of higher spatial harmonics with significant values of their amplitudes. This disadvantage is due to a pronounced step changes magnetomotive force along the bore of the stator. The effect of higher spatial harmonics of the magnetomotive force leads to a decrease of the electromagnetic torque of the electric machines, especially in the area of low frequencies of rotation of the rotor, the increase in the differential resistance of the scattering stator windings, growth losses and the heating temperature of the active parts of electrical machines, vibration and noise.

Also known multiphase two-layer concentric winding (SU 1690103 A1 Multiphase two-layer concentric winding (IPC H02K17/14, H02K3/28; Patentee: LVIV POLYTECHNIC INSTITUTE LENIN KOMSOMOL; Published 07.11.1991)).

The disadvantage of this coil is that its application is possible only in three-phase electrical machines three-phase alternating current with the number of grooves per pole and phase q>3, which does not allow to use it, for example, submersible motors for the petroleum industry, which because of the small diameter of the stator are manufactured with the number of grooves per pole and phase q=2, in rare cases with q=3.

Also known scheme of three-phase windings in Razvilka" three-phase stators of electrical machines AC / A.I. Waldek. The electric machine. A textbook for students of the College. technology. educational. institutions. And the doctor 2nd, Rev. and supplementary L., "Energy", 1974, s, Fig.21-15 /.

The circuit of this winding is closest in technical essence to the proposed winding and considered further as a prototype.

Three-phase stator winding in Razvilka" electric AC machine consists of three single-phase winding axes are shifted in space relative to each other by 120 degrees. All single-phase stator winding is formed by the same number of coils, the number of which is over double pole dividing the stator is equal to Z/2pm. The coil of which is formed a single-phase winding have the same shape, are performed with the same number of turns and the same pattern of connections between them. For pole dividing the stator active side of the coils belonging to this phase winding are placed in a single layer in Z/2pm adjacent the slots that they completely fill them.

The disadvantage of three-phase windings in Razvilka" is that in addition to the main spatial harmonics of magnetomotive force they create a wide range of higher spatial harmonics of the significant size of their amplitudes. This disadvantage is due to a pronounced speed distribution of magnetomotive force along the bore of the stator. CCA is Enen this applies to electrical machines with a low number of slots of the stator. The higher spatial harmonics of magnetomotive force of the stator winding lead to a reduction in the electromagnetic torque of the electric machines, the increase in the differential resistance of the scattering of the stator winding, growth losses and the heating temperature of the active parts, occurs when the vibration and noise. All this negatively affects the performance of electrical machines three-phase alternating current.

The objective of the invention is to provide a stator winding of three-phase electrical AC machines, providing significant attenuation of higher spatial harmonics of the magnetic field, the approximation of the distribution of magnetic field in the gap machines to sinusoidal and the improvement due to this operational characteristics of electric machines.

To solve this problem is the stator winding of the electric AC machine containing three single-phase windings formed by an equal number placed in the slots, the coils interconnected by identical circuitry for spatial shift of the axes of the windings relative to each other by 120 degrees, characterized in that each of the phase windings during a double pole dividing the stator is formed 2Z/2pm coils, which include Z/2pm groups of equal number to the birds in groups each of the groups of coils made with different width constituent coils and different numbers forming the coil turns, compared with other groups of coils, with the coils of one group performed a minimum width which is equal to (q+1) Zubovich dividing the stator have a minimum number of turns determined from the formula $W_{f} / 2 \cdot \sum_{i = 1}^{q} i$ and placed in grooves arranged symmetrically about the axis of the poles, and the width and number of turns of the coils of each subsequent group is made different from the width and number of turns of the coils of the previous group on two Zubovich dividing the stator and on the value of $W_{f} / 2 \cdot \sum_{i = 1}^{q} i$ accordingly, and placed coils of these groups concentrically with respect to the coils with a minimum width and a minimum number of turns and the amount of slots that remain free after laying coils of this single-phase winding, used to hold coils of the other two phase windings, made the same as the above, where Z is the number of slots of the stator, 2p is the number of poles, m is the number of stator phases, W_f- the number of turns of the phase winding per pair of poles, q is the number of slots per pole and phase, q=Z/2pm.

The invention is further explained in the description of the preferred embodiment variants of the invention with reference to the accompanying drawings, in which:

Figure 1 depicts the schematic phase And X-phase winding of the stator according to the invention;

Figure 2 depicts the scheme of three-phase stator winding according to the invention;

Figure 3 depicts the graph of the harmonic content of MDS three-phase stator winding according to the invention;

Figure 4 depicts a diagram of the harmonic content of MDS three-phase stator winding of submersible motor series pad.

Scheme-phase windings A-X the proposed three-phase stator winding (m=3) of an electric machine with a number of grooves Z on the stator equal to 18, the number of poles 2P = 2, is shown in figure 1. Figure 2 presents the diagram of the proposed three-phase winding. Figure 3 shows a diagram which shows the harmonic composition of the magnetomotive force of the stator with the proposed three-phase winding. Moreover, in figure 3 the horizontal axis shows the ordinal number of the harmonic, and the vertical axis shows the amplitude of MDS (PU), created the corresponding harmonic. In figure 4, cf is Vania, a diagram of the harmonic content of magnetomotive force three-phase stator winding of submersible motor series pad used to drive a centrifugal pump for lifting fluids from oil wells (Z=18, 2P=2, m=3, q=3, the volume of each groove is completely filled by a single active side of the coils belonging to one or another phase winding of the stator /Catalog of oilfield equipment, automation equipment, devices and materials. M: VNIIEM, 1994, 35)/.

Single-phase winding A-X (1) contains six coils (2Z/2pm=2·18/2·3=6)were formed three groups (Z/2pm=18/2·3=3) two coils ((2Z/2pm)/(Z/2pm)=6/3=2) in each. The coils of one group, let's call it first, have a minimum width that is four Zubovich divisions stator (q+1=((Z/2pm)+1)=3+1). The coils of the second group have a width of six Zubovich divisions, two Zubovich division greater than the width of the stator coils of the first group. The coil of the third group have a maximum width which is two Zubovich division greater than the width of the stator coils of the second group and is eight Zubovich divisions. The number of turns in the coils of the first group is minimal and W_f/12 ( $W_{f} / 2 \cdot \sum_{i = 1}^{3} i$ ). The number of turns in the coils of the second group is equal to W_f/6 ( $W_{f} / 12 + W_{f} / 2 \cdot \sum_{i = 1}^{3} i$ ). The coil of the third group have the greatest number of turns W_f/4 ( $W_{ô} / 6 + W_{f} / 2 \cdot \sum_{i = 1}^{3} i$ ).

Coil with the greatest number of turns forming the third group, their active sides are placed in the grooves 5, 13 and 14, 4, respectively. The active side of the coils of the second group are placed in the slots 6,12 and 15.3, and the coils of the first group are placed with their active sides in the slots 7,11 and 16.2. One coil belonging to different groups, for pole dividing the stacked concentric with each in relation to each other. So the coils of the first group are placed inside the coils of the second group, which themselves are located inside the coils of the third group. However, the coils of the same group, posted on a nearby pole divisions, are placed in the "Razvilka". The active side of all single coils is Noah winding A-X are placed in a single layer in the slots of the stator, occupying a different part of their volume. The least populated are the grooves in which are placed the coil of the first group, most of the volume of the slots occupied by the coils of the second group, and most are filled the slots with reels of the third group.

Single-phase winding B-Y C-Z (2) are formed on the same principle as the single-phase winding And Agricultural Laying coil phase windings B-Y C-Z in the slots of the stator must be implemented in such a way as to shift the axes of these coils with respect to the axis of the single-phase winding A-X in 120 and 240 degrees respectively. The realization of this condition leads to the fact that each groove of the stator are active sides of the coils of the two-phase windings (upper part of figure 2). Applied to the stator of the inventive winding is achieved by one of the following two combinations of distribution of the active sides of the coils in the slots: the active side of the single-phase coil winding with the highest number of coils and the active side of the single-phase coil winding with a minimum number of turns; the active side of the coils of the two phases with equal number of turns. In both of these cases there is the equality of the number of turns in the slots provided full fill all the slots. This principle remains valid and in electrical machines with a different number n is the call to the stator. The difference will be only in the number of possible combinations.

The electrical circuit connections of the coils of the phase winding a-h shown in figure 1. This scheme provides the same direction of the current in the conductors of the active sides of the coils placed in the slots 2÷7, and the same, but opposite the direction of current in the conductors of the active sides of the coils placed in the slots 11÷16. Electric circuit connections of the coils forming a single-phase winding B-Y C-Z, repeat the circuit of the coils of the phase winding a-h (figure 2).

Data on the harmonic composition of the magnetomotive forces and values of the amplitudes of a number of harmonics for the stator with the proposed winding and stator submersible motor series SEM are shown in tables 1 and 2. This data is used to build charts (figure 3, figure 4), clearly shows the spectra generated by the windings of the stators of higher spatial harmonics of the magnetomotive forces, and values of the amplitudes of the individual harmonics. Comparison of tabular data and graphical display of these data in the form of diagrams shows that the proposed winding provides a reduction of the amplitude of the 3rd harmonic 2.13 times the amplitude of the 5th harmonic in scored 8.38 times, the amplitude of the 7th harmonic 3.5 times.

Table 1
The harmonic composition of the magnetomotive force of the stator with the proposed three-phase winding
Harmonic number	1	3		7		1	13	5
Amplitudephase	1.8284	0.1940	0.0094	0.0120	0.0000	0.0059	0.0020	0.0139

0.0778

Table 2
Harmonic composition magnetomotive force three-phase stator winding of submersible motor series pad
Harmonic number	1	3	5			1	13	15
Amplitudephase	1.8284	0.4147	0.0422	0.0556	0.0207	0.0169	0.0298

A significant weakening of the higher spatial harmonics of the magnetomotive force and the magnetic field allows to increase the electromagnetic torque of the electric machines, especially in the area of low frequencies of rotation of the rotor, to reduce losses and heating of electrical machines, to reduce noise and vibration arising from the operation of electrical machines, to reduce the differential resistance of the scattering of the stator. A significant advantage of the proposed winding is that it can be done "in Razvilka" an odd number of slots per pole and phase of the stator, which cannot be achieved by known circuits of the windings. The implementation of the circuits of the windings of the stator in Razvilka" reduces the length of end portions of the coils, saving active materials and further reduce energy losses.

The present invention is intended for use at the enterprises of electric machinery industry during production of electrical machines three-phase alternating current, especially electrical machines with a small number of slots per pole and phase, for example in an asynchronous electric motors of submersible centrifugal pumps, the diameter of the stator which limited the size of the casing pipe. Very promising application of the invention in electrical machines for medical equipment that require a low level generated during operation noise, etc.

The stator winding of the electric AC machine containing three single-phase windings formed by an equal number are placed in the slots of coils interconnected by identical circuitry for spatial shift of the axes of the windings relative to each other by 120 degrees, wherein each of the phase windings during a double pole dividing the stator is formed 2Z/2pm coils, which include Z/2pm groups with the same number of coils in groups, with each group of coils made with different width constituent coils and different numbers forming the coil turns, compared with other groups coils, with the coils of one group performed a minimum width which is equal to (q+1) Zubovich dividing the stator have a minimum number of turns determined from the formulaand placed in grooves arranged symmetrically about the axis of the poles, and the width and number of turns of the coils of each subsequent group is made different from the width and number of turns of the coils of the previous group on two Zubovich dividing the stator and on the value of accordingly, the coils of these groups are placed concentrically in relation to the coils with a minimum width and a minimum number of turns and the amount of slots left free after laying coils of this single-phase winding, used to hold coils of the other two phase windings is accomplished similarly to that described above, where Z is the number of slots of the stator, 2P is the number of poles, m is the number of stator phases, W_f- the number of turns of the phase winding per pair of poles, q is the number of slots per pole and phase, q=Z/2pm.