Low noise induction motor |
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IPC classes for russian patent Low noise induction motor (RU 2507664):
     
 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 1st coil group is connected to beginning of the 7th one; the end of the 8th coil group is connected to beginning of the 2nd one; the end of the 3rd coil group is connected to beginning of the 9th one; the end of the 10th coil group is connected to beginning of the 4th one; the end of the 5th coil group is connected to beginning of the 11th one; the end of the 12th coil group is connected to beginning of the 6th one; outputs are taken from the joined end of the 7th group and beginning of the 8th one; from the joined end of the 9th group and beginning of the 10th one; from the joined end of the 11th group and beginning of the 12th one; from the joined end of the 4th group and beginning of the 1st one; from the joined end of the 6th group and beginning of the 3rd one; from the joined end of the 2nd group and beginning of the 5th 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 1st coil group is connected to beginning of the 7th one; the end of the 8th coil group is connected to beginning of the 2nd one; the end of the 3rd coil group is connected to beginning of the 9th one; the end of the 10th coil group is connected to beginning of the 4th one; the end of the 5th coil group is connected to beginning of the 11th one; the end of the 12th coil group is connected to beginning of the 6th one. Outputs are taken from the joined end of the 6th group and beginning of the 1st one; from the joined end of the 2nd group and beginning of the 3rd one; from the joined end of the 4th group and beginning of the 5th one; from the joined end of the 2nd group and beginning of the 3rd one; from the joined end of the 7th group and beginning of the 8th one; from the joined end of the 9th group and beginning of the 11th 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.
 Dipolar winding of asynchronous generator / 2470444
Invention relates to the field of electrical engineering and may be used, in particular, in asynchronous generators with capacitor excitation for autonomous power plants. A dipole winding of an asynchronous generator is proposed, which comprises twelve coil groups with outputs and a certain logic of coil groups connection, in which the first output of the winding is taken from combined beginnings of the first, second and twelfth coil groups, the second output of the winding is taken from combined beginnings of the third, seventh and eleventh coil groups, the third output of the winding is taken from combined beginnings of the fourth, fifth and sixth coil groups, the fourth output of the winding is taken from the combined beginnings of the eighth, ninth 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 second coil group is connected with the end of the eighth coil group, the end of the third coil group is connected with the end of the ninth coil group, the end of the fourth 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 sixth coil group is connected with the end of the twelfth coil group, and the first, second and third capacitors of excitation are connected to the first, second and third outputs of the winding.
 Three-phase asynchronous electric motor / 2478249
In three-phase asynchronous electric motor consisting of a stator including a housing, a hollow steel charged core attached from the inside to the housing and carrying the slots on inner cylindrical surface, and three-phase power winding laid in slots of charged core and made in the form of three single-phase windings with similar parameters and spatial shift of axes through 120 degrees, a rotor arranged inside the stator core with an air gap in relation to it, and end shields attached to the stator housing, in which the rotor shaft is installed, according to the invention, the stator includes an additional compensating three-phase winding laid into slots of the core and consisting of three single-phase windings with similar parameters, the axes of which are offset in space through 120 degrees; at that, additional compensating three-phase winding is isolated from three-phase power winding; its single-phase windings are connected to a star diagram, and phase beginnings are connected to capacitors connected to a triangle diagram, which are installed on the motor or beyond the motor.
 Double frequency electrical machine / 2477558
Invention is aimed to enable electric energy transmission from a stationary source to a rotary receiver such as from a solar cell battery rotating round the space vehicle to such space vehicle as well as a rotary receiver drive. According to the invention, the double frequency electrical machine has two three-phase windings combined within a common stator core, the numbers of the windings pole pairs equal to p1 and p2; induced in the poles are EMPs with frequencies equal to f1 and f2 accordingly (f1<f2); there are terminals for connection of external electrical circuits; placed on the rotor is at least one phase winding having terminals for connection of external electrical circuits. Additionally, the double frequency electrical machine may have a rotor with magnetised poles or unmagnetised projections, their number equal to 2·p1.
 Multi-phase bar wave winding of stator of asynchronous motor / 2437197
Bar wave winding of stator of asynchronous motor is single-layer, and winding bars are solid; at that, height of bar hb, which is determined using the equations for damping factor kd and relative current displacement factor ξ, which are calculated at maximum frequency value f of supply voltage on condition that damping factor kd is at least by two times more than the value of the required control range of rotation frequency of asynchronous motor.
 Low-speed asynchronous electric motor / 2412518
Low-speed asynchronous electric motor includes stator with multi-phase winding and rotor with interleaved core and short-circuited winding. Stator phases are made in the form of annular windings coaxial with rotor, each of which is located between two annular magnetic cores with teeth protruding in axial direction and which are opposite directed. At that, annular magnetic cores of the phase are offset relative to each other through π/z angle, and between them there arranged is toroidal magnetic core, and annular magnetic core of various phases are offset relative to each other through 2π/z·m angle, where z - the number of teeth of each annular magnetic core, and m - the number of phases.
 Two-phase induction welding generator / 2404032
Proposed invention can be used in hand-held electric arc welding devices. Induction welding generator has two-winding stator. Three-phase excitation winding 2 has terminals for excitation capacitors 3 to be connected thereto. Working winding 4 is a two-phase winding. Circuit of said winding each phase 4, 5, shifted through 90 degrees, incorporates compound capacitor 6, 7 and single-phase bridge rectifier 8, 9 shunted by shunting capacitors 10, 11. Output terminals of rectifiers 8, 9 are connected in parallel and welding electrode 12 is connected thereto.
 Short-circuited rotor with squirrel cage of asynchronous machine / 2386201
Proposed short-circuited rotor with squirrel cage comprises shaft (1) and laminated core of sheet steel (2), in laminated core of sheet steel (2) there are rotor winding (3) rods located, which at both ends of laminated core of sheet steel (2) are pulled through openings (10) of each end plate (9) and closed by short-circuited ring (4), which, being electrically conducting, connects ends of rotor winding (3) rods on one side of short-circuited rotor to squirrel cage, besides each end plate (9) comprises circumferential ledge, which at least partially covers short-circuiting ring (4) with geometric closure at its outer side, besides each end plate (9) comprises part of rotor winding (3) rod and part of short-circuiting ring (4). At the same time, according to the present invention, end plates (9) are arranged as massive and are made of stronger material compared to rods of rotor winding (3) and short-circuiting rings (4), besides rods of rotor winding (3) have bulge at their ends with increased cross section of rod (7), moreover, at least part of rotor winding (3) rods bulge lies in openings (10) of end plates (9), besides transition between bulge and short-circuiting ring (4) is arranged in the form of rounding with transitional radius (8).
 Double-winding stator with m=3-phase 2p1=6·k- and 2p2=8·k-pole lap windings in z=144·k slots / 2355097
Present invention pertains to electric machine engineering. The invention seeks to simplify manufacturing and increase use of active materials, while reducing input of insulating materials and coefficient of differential scattering σd% m=3-phase 2p1=6·k- and 2p2=8·k- pole lap windings of a stator in z=144·k slots. The essence of the invention lies in that, the double-winding stator of an asynchronous motor has m=3-phase 2p1=6·k- and 2p2=8·k-pole lap windings in z=144·k slots, each of which is made symmetrical from m=6-zone from equally spaced coils, put into the slots in two layers. According to this invention: from K=z coils with numbers from 1K to (z)K, the 2p1 pole winding relates to K/2 coils with odd numbers 1K, 3K,…(z-1)K, containing wK1 turns and connected into 6p1 coil semi-groups with q'1=4 neighbouring coils in each. The 2p2 pole winding relates to K/2 coils with even numbers 2K, 4K,…,(z)K, containing wk2 turns and connected into 6p2 coil semi-groups with q'2=3 neighbouring coils in each. All coils have uneven spacing in the slots, equal to yk=19, or yk=21, where k=1, 2 given q'1=z/12p1 and q'2=z/12p2.
 Double-winding stator with m=3-phase 2p1=12·k- and 2p2=14·k-pole lap windings in z=126·k slots / 2355096
Present invention relates to electric machine engineering. The invention seeks to simplify manufacturing and increase use of active materials, while reducing input of insulating materials and coefficient of differential scattering σd% m=3 phase p1=12·k and 2p2=14·k - pole lap windings in z=126·k slots. The essence of the invention lies in that, for the double winding stator of an asynchronous motor with m=3 phase 2p1=12·k- and 2p2=14·k- pole lap windings in z=126·k slots, each of which is made symmetrical with an m=6-zone from equally spaced coils, put into slots in two layers: from K=z coils with numbers from 1K to (z)K, the 2p1 pole winding relates to K/2 coils with even numbers 1K, 3K,…, (z-1)K, containing wk1 turns and connected into 6p1 coil semi-groups, given q'1=7/4 and with grouping of their coils into a 2 2 2 1 row, which repeats nine times. The 2p2 pole winding relates to K/2 coils with even numbers 2K, 4K,…, (z)K, containing wk2 turns and connected, given q'2=3/2, into 6p2 alternating double- and single-coil semi-groups. The spacing of all coils in the slots equals yk=9, where k=1, 2 when q'1=z/12p1 and q'2=z/12p2.
 Double-winding stator with c m=3-phase 2p1=8·k- and 2p2=10·k-pole lap windings in z=144·k slots / 2355095
Present invention pertains to electric machine engineering. The invention seeks to simplify manufacturing and increase use of active materials, while reducing input of insulating materials and coefficient of differential scattering σd% m=3-phase 2p1=8·k and 2p2=10·k - pole lap windings in z=144·k slots. The essence of the invention lies in that, for the double winding stator of an asynchronous motor with m=3 phase 2p1=8·k and 2p2=10·k-pole lap windings in z=144·k slots, each of which is made symmetrical with an m=6-zone from equally spaced coils, put into slots in two layers: from K=z coils with numbers from 1K to (z)K, the 2p1 pole winding relates to K/2 coils with odd numbers 1K, 3K,…, (z-1)K, containing wk1 turns and connected into 6p1 coil semi-groups with q'1=3 neighbouring coils in each. The 2p2 pole winding relates to K/2 coils with even numbers 2K, 4K,…,(z)K, containing wk2 turns and connected into 6p2 coil semi-groups given q'2=12/5, with grouping their coils in a 3 2 3 2 2 row, which repeats six times. The spacing of all coils in the slots equals yk=15, where k=1, 2 when q'1=z/12p1 and q'2=z/12p2.
 Double-winding stator with m=3-phase 2p1=6·k- and 2p2=8·k-pole lap windings in z=72·k slots / 2355094
Present invention relates to electric machine engineering. The invention seeks to simplify manufacture and increase use of active materials while reducing input of insulating materials and lowering coefficient of differential scattering σd% m=3-phase 2p1=6·k- and 2p2=8·k-pole lap windings of a stator with z=72·k slots. The essence of the invention lies in that, the double-winding stator of an asynchronous motor has m=3-phase 2p1=6·k- and 2p2=8·k-pole lap windings in z=72·k slots, each of which is made from m=6-zone from equally spaced coils, put into the slots in two layers. According to this invention: from K=z coils with numbers from 1K to (z)K, the 2p1 pole winding relates to K/2 coils with odd numbers 1K, 3K,…(z-1)K, containing wk1 turns and connected into 6p1 coil semi-groups with q'1=2 neighbouring coils in each. The 2p2 pole winding relates to K/2 coils with even numbers 2K, 4K,…,(z)K, containing wk2 turns and connected, given q'2=3/2, to 6p2 into alternating double- and single-coil semi-groups. All coils have spacing in the slots, equal to yk=9, where k=1, 2, 3; q'1=z/12p1 and q'2=z/12p2.
 Motor-brake / 2287889
Stator and rotor contacting surfaces of motor-brake built around squirrel-cage induction motor are provided with taper thread; rotor shaft is supported on one end by radial bearing and on other one, by thrust bearing with spacer disk affording cohesion between stator and rotor threaded surfaces during reverse movement of rotor; shaft extension of the latter is splined.
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FIELD: electricity. SUBSTANCE: 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. EFFECT: reduced level of acoustic noise and vibrations of an induction motor caused by electromagnetic forces. 7 dwg
The invention relates to the field of electrical engineering and can be used in any industry and transport, as well as for creating objects, which have to meet high requirements with respect to noise and vibration. It is known that in a conventional asynchronous motor winding in the form of a "star" or "Delta" magnetic field winding in the working gap is not sinusoidal and is very different from the sine wave speed curve magnetomotive force (MDS) [1-3] (figure 1-2, where Fig. 1 is presented in relative units distribution curve MDS the prongs of a standard engine with a single-layer winding and the number of grooves of the stator z1=24, the number of pairs of poles 2p=2 at different points in time t, where T is the period; figure 2 - distribution curve MDS the teeth of the stator standard motor with single-layer winding Z1=36, 2p=2 at different points in time). This leads to the simulation of traction of the rotor occurs mini chiding and mini slowing its rotation [2], which causes undesirable acoustic noise and vibration of the engine, due to the electromagnetic forces [2, 3]. From a technological point of view on the background of that kind of noise and vibration in significant quantities is extremely difficult to identify the sources of other types of noise and vibrations. As a consequence, inevitably satr dreamsa development of manufacturing technology for low-noise motors. Therefore, manufacturers of induction motors for the purpose of lowering the level of noise and vibrations tend curve MDS in the air gap closer to the sine wave in different ways [2, 3]. Known [4] asynchronous machine rotor, which includes a composite six-phase stator winding consisting of two combined parts connected, respectively, to the "star" and "triangle". At each phase there is an equal number of slots, the coils of different phases are arranged in different slots so that the resulting vectors of the magnetic flux of each of the adjacent phases form an angle of 30 e. grad., odd phases are connected in a "star"and even in "the triangle", or Vice versa. The interconnected terminals of the coils (separated from each other by 30 El. deg.) form the point of phase connection to the mains. The combination in a composite six-phase winding of the stator (or rotor) induction motor two-phase interdependent combined windings "triangle" and "stars" due to a larger than standard motor with one winding, the number of phases and the addition of the magnetic fields of the two coils leads to the fact that such induction motor1 characterized by a more "smooth" and close to a sinusoid curve MDS (Fig. 3-4, where Fig. 3 presents the distribution curve MDS the teeth of the stator of the motor combined with a single layer of winding Z 1=24, 2p=2 at different points in time; figure 4 - distribution curve MDS the teeth of the stator of the motor combined with a single layer of winding Z1=24, 2p=2 at different points in time). The technical result of the invention is to reduce the level of acoustic noise and vibration of an induction motor, caused by the electromagnetic forces. This is achieved by the fact that low noise induction motor includes two interdependent combined windings, one of which is collected in a "star"and another in "the triangle". These windings are laid in the grooves so that the resultant vector of the induction magnetic fluxes pairs of poles of the same phase "stars" and "triangle" form an angle of 30 e. hail (Fig. 5, where U1, V1, W1 - point connection of the motor to an external three-phase supply network, Ci- conclusions winding "stars", Ci' winding outputs "triangle", and the Arabic numbers denote the sequence number of the coil) through the appropriate location of these coils windings. The principle of operation of the proposed low noise induction motor is the same as the known induction motors. As an example in Fig. 5-6 in standard notation presents the schematic of the single-layer windings options low noise induction motor, for which the species Cree is Oh resultant MDS in the working gap is shown in Fig. 3-4; 7 - design of double-layer winding noise of the engine (U1, V1, W1 - point connection of the motor to an external three-phase mains, Z1- the number of the slots of the stator, p is the number of pairs of poles, a1- the number of parallel branches, y1- step winding, Ci- conclusions winding "stars", Ci' winding outputs "triangle", and the Arabic numbers denote the sequence number of the coil). Sources of information 1. Design of electrical machines. Edited by I.P. Kopylova. Meters, Energy, 1980 2. A.V. Barkov, N. Barkov. Intelligent system monitoring and diagnostics of machines by vibration. Proceedings of the St. Petersburg power engineering Institute of professional training of the Ministry of energy of the Russian Federation and the Institute of vibrations USA, 9, Saint-Petersburg, 1999 3. A.V. Ivanov-Smolensky. Electrical machines, vol 1, M, MPEI publishing house, 2006 4. Patent UM EN 109934 U1, publ. 27.10.2011. Low noise induction motor, which includes two interdependent combined windings, one of which is collected in a "star", and the second in "the triangle", is laid in the grooves so that the resulting vectors of the magnetic fluxes pairs of poles of the same phase "stars" and "triangle" is formed between a working clearance angle of 30 e. degrees.
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