Multi-phase bar wave winding of stator of asynchronous motor |
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IPC classes for russian patent Multi-phase bar wave winding of stator of asynchronous motor (RU 2437197):
     
 Ac electric machine / 2411623
In AC electric machine, comprising rotor and stator with winding arranged in it and made of K coils, it is suggested to install coils in stator winding so that central angle α1 between axes of cross sections of sides of each coil, determining width of coil, equals α1=(360°+60°·m)/2K; number of coils K is determined by ratio K=(1+m/6)·p, where m - number of phases, p - number of pole pairs of magnetic field, at the same time p is multiple of three for m = 2 and is multiple of two for m = 3.
 Direct drive for powerful drives / 2395887
Proposed drive is arranged with stator (1) from several segments when looked at in direction of perimeter (3, 4, 5, 6), which accordingly have closed circuit of winding connection, and rotor made of segments, which are on jointly rotating facilities and there electromagnetically interact with system of stator winding (1).
 Method of wave winding installation in stator of multi-phase rotating electric machine and stator that relates to it / 2341861
According to suggested method of wave windings installation every section (70) of phase winding is formed as sequence of teeth (71) with two side branches (711) for installation into setting position in the groove, sections of winding (70) are placed onto mounting tool (80), turns (73) are laid into stator grooves in the order that is reverse to order of winding, at that sections (70) of winding are simultaneously laid around mounting tool (80), at that turns (73) that follow one another in preset order of winding are related alternately to different sections (70) of winding, which may be arranged as simple wave or distributed wave. Also stator of multi-phase rotating machine is suggested, which contains laminated packet (10) with central opening and axial slots (30), which are provided on the internal side on radial surface of laminated packet (10), in which wave winding is installed, which is laid into stator slots according to suggested method.
 Method and device for stator and rotor winding manufacturing, and respectively produced stator and rotor winding / 2339146
Invention is attributed to the field of electric engineering and concerns execution particularities of coil windings for stators or rotors of electric machines with inside-open slots. Substance of invention consists in manufacturing of coil winding for stators or rotors where each coil turn with corresponding jumper wire (14) lays in two stator or rotor slots respectively and both jumper wires (14) are connected by frontal part (16) of winding protruding out of stator or rotor butt-end surface. At that simultaneously several coils are made by means of n parallel wires (10) winding on rotating pattern. To obtain smaller frontal winding parts, the jumper (14) and the frontal part (16) is alternatively created of each of parallel wires (10) on pattern (20) in the first working stage A. After that in working stage B, created jumpers (14) and wire guide are shifted together with one of the ends of these frontal parts (16) by means of axial moving of pattern (20). After multiple repetitions of working stages A and B, jumpers (14) are created for the last n stator slots. After that winding is removed from the pattern, flat-squeesed, put into coil receiver in the form of strip plate, then shift to open in radial direction slots of transfer tool and squeese out of them in radial direction outside into stator or rotor slots. Also device is suggested for manufacturing of stator or rotor with these windings.
 Winding of electric machine with short overhang of frontal parts / 2310965
Winding of electric machine, consisting of rigid coils, is made of rectangular cross-section wire and has groove and frontal parts. In accordance to the invention, each rod of winding during transition from groove part to frontal part and backwards is twice bent along the line passing at an angle of 45 degrees to longitudinal axis of wide side of rod, and frontal parts of coils of different phases of winding are positioned one after the other along the rotation axis of machine and bent along a circle.
 Double-layer three-phase stator winding of two-pole electrical machine / 2290733
Proposed double-layer three-phase stator coil winding is disposed in three-level slots of two-pole electrical machine, their depth complying with triple height of one of coils placed therein, and in two-level slots whose depth corresponds to double height of one of coils placed in them; number of three-level slots equals that of two-level ones; mentioned slots are alternating so that group of three-level slots equal to number of slots per pole per phase is followed by group of two-level slots equal to number of slots per pole per phase; phase bands of winding formed by some coil sides coincide with those of coils disposed at third (bottom) level of three-level slot groups and at first (top) level of two-level slot groups; other coil sides of all coils characterized by reduced winding pitch are disposed at intermediate (second) layer of three- and two-level slots. Proposed design provides for balancing resistances of all winding phases and makes it possible to avoid lifting of great number of coil sides at a time which is independent of winding pitch reduction and will equal number of slots per pole per phase q.
 Two-pole three-phase electrical machine stator (alternatives) / 2290732
Proposed stator has double-layer, three-level three-phase coil winding and core half of whose slots accommodate upper- and intermediate-level windings and other half of slots receive lower- and intermediate-level windings. Two-pole electrical machine stator of first design alternate has triple-level double-layer three-phase coil winding and core half of whose slots accommodate upper- and intermediate-level windings while lower- and intermediate-level windings are placed in other half of slots; stator core is built of laminated active-steel segments; depth of all core slots corresponds to total height of three levels; insulating shims are installed in bottom of slots accommodating upper- and lower-level windings and in top part of slots accommodating lower- and intermediate-level windings. Winding of second design alternate has three-level double-layer three-phase coil winding and core half of whose slots accommodate upper- and intermediate-level windings while lower- and intermediate-level windings are placed in other half of slots; stator core is made of laminated active steel segments; depth of all core slots corresponds to total height of three winding levels; auxiliary windings are placed in bottom of slots accommodating upper- and intermediate-level windings and in top part of slots accommodating low- and intermediate-level windings.
 Electrical machine armature winding / 2277282
Electrical machine armature winding is wound of multiturn sections incorporating series-connected coils placed under all poles so that closest sides of adjacent coils are spaced one tooth pitch apart and any two adjacent coils are wound in opposite directions; coil number in section is greater than pole number; coils disposed under any pole are shifted along armature slots through one tooth pitch and are equally spaced apart on armature. Armature coil pitches under adjacent poles differ by one tooth pitch with odd number of slots and even number of coils per pole pair or with even number of slots and odd number of coils per pole pair. In case of even number of armature slots and odd number of coils per pole pair armature coil pitch is greater under pole wherein coil number is greater. The result is that coils of each section are distributed both under different poles and under separate pole thereby providing for greater number of section coils than pole number of electrical machine and, hence, section inductance is reduced. Essential part of active coil sides of each preceding section is disposed in this case in same slots as active coil sides of next sections thereby enhancing mutual magnetic coupling between adjacent sections.
 Commutator electrical machine armature / 2269192
At least first and last slot sections of armature winding are divided into separate equal-pitch coils offset over armature through equal number of slots; slot pitch of first-section coils is smaller than that of coils of last sections by coil pitch within sections. Part of active sides of coils in each preceding section is disposed in same coils as active coil sides of next sections which ensures high magnetic coupling between adjacent sections.
 Symmetrical three-phase bipolar two-layer winding / 2256275
In a symmetrical three-phase bipolar two-layer windings the coils are divided into 6 groups and laid by two layers in Z=6q slots, where q>2 is an integral number of uniformly distributed along the running air gap so that the first layer is formed by analogous (left-hand or right-hand) active sides of the coils, which occupy a half of each slot, the second layer that occupies the remaining the remaining volume of each slot, is formed by the opposite (right-hand or left-hand active sides of the coils. According to the invention, each coil group of the winding made of (q-m) coils, where l≤m<q is an integral number, ia laid in (q-m) of the adjacent slots with pitch 4=2q and omission of m slots between the adjacent groups.
 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.
 Double winding stator with m=3-phase 2p1=8·k- and 2р2=10·k-polar lap windings in z=96·k slots / 2355093
Present invention pertains to electric machine engineering. The invention seeks to simplify manufacturing and increase use of active material while reducing use of insulating materials and values of coefficient of differential scattering σd% m=3-phase 2p1=8·k and 2p2=10·k-polar lap windings of a stator with z=96-k slots. The essence of the invention lies in that, the double-winding stator of an asynchronous motor has m=3-phase 2p1=8·k- and 2p2=10·k- pole lap windings in z=96·k slots, each of which is made symmetrically 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=8/5, with grouping their coils in a 22121row, which repeats six times. 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.
 Electromechanical core drilling assembly / 2337225
Assembly contains power supply source with control system, submersible asynchronous three-phase electric motor, rotor of which is connected to core tube with crown, stator connected with top tube, and elastic element that is rigidly fixed with cable lock on one side and electric motor rotor on the other. Source of windings power supply is equipped with single-phase bridge rectifier, rotor of submersible asynchronous three-phase electric motor is made with one pair of explicit poles, and one phase stator winding is serially connected with bridge single-phase rectifier, to the outlet of which by direct current two other phase windings are connected by serially connected between each other ends, which form one pair of poles, with the possibility of rotor fixation with stator by elastic element in initial position, at which longitudinal axis of rotor symmetry coincides with longitudinal axis of symmetry of electromagnet field formed by two serially connected stator windings.
 Asynchronous two-frequency generator / 2313886
Asynchronous two-frequency electric machine contains short-circuited rotor and two three-phased windings combined in common core of stator with numbers of pole pairs p1 and p2, where EMF are induced at frequency f1 and f2 respectively, having clamps for connecting external electric circuits, including electric receivers, while in parallel to winding with number of pole pairs p2 a three-phased excitation capacitor is connected, also contains a motor as supply of mechanical power which rotates shaft of machine, and additional three-phased excitation capacitor, connected in parallel to winding with a number of pole pairs p1.
 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: 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. EFFECT: enlarging the control range of rotation frequency of asynchronous motor owing to increasing its maximum moment at increase of supply voltage frequency, as well as simplifying the design of bar wave winding owing to its single-layer design at one bar in each slot, which allows considerably reducing labour intensity for manufacture of asynchronous motor and reducing the sizes of front parts of winding. 2 cl, 3 dwg
The invention relates to the field of electrical engineering and can be used in the design of asynchronous electric motors fed by frequency converters. Known three-phase core-layer wave winding when the number of turns of the coil (terminals) wk=1 (Waldek A.I. of the Electric machine. L.: Energy, 1978, C-409, 415-422). Core wave windings are usually made of double-layer with two rods in the groove and reduce the consumption of copper due to the reduction of the connections between the coils and reduce the labor required in comparison with a loop windings. In conventional machines using the core winding, to reduce the effect of the displacement current rods are not solid, but made of parallel-connected elementary conductors having a height less than the depth of penetration of an electromagnetic wave for a given frequency power applied conductive material. Elementary conductors are transposed in the groove along the length of the machine. With increasing frequency above the nominal (typically 50 Hz) while maintaining the power supply voltage constant (typically 380 V) the value of the flow decreases inversely proportional to the frequency. At the same time the flow is reduced by increasing the inductive reactance of the stator. Thus, the maximum value m is ment M max(i.e. overload capacity of the machine) is not reduced in inverse proportion to the frequency, and more intensively by increasing the inductive reactance of the stator. In this regard, the induction motor has insufficient range of speed control. Technical result provided by the invention, is to expand the range of speed control by increasing the maximum moment (Mmax) asynchronous motor with increasing frequency of the supply voltage. In addition, the invention is characterized by simplicity of design core wave winding, running a single layer with one rod in each groove, which can significantly reduce the complexity of manufacturing an induction motor, to reduce the size of the end parts of the winding. This technical result is ensured by the fact that the core wave stator winding of an induction motor is made of single-layer, and the terminals of the winding are made solid, the height of the rod is chosen such size that the damping coefficient at the maximum frequency of the supply voltage was not less than two times the amount of the required range of speed control of induction motor. This technical result is ensured also by the fact that ahogadas is on one side of the stator front side rods, intended for placement in even-numbered slots are longer than their front part located on the other side of the stator and located on the same side of the stator front side rods, intended for placement in odd-numbered slots of the stator are of less length than the frontal part located on the other side of the stator, while connecting the jumper between terminals are located in the planes, the number of which is equal to the number of slots per pole and phase, with the long connecting jumpers are located in planes that are most remote from the end surface of the stator. The invention is illustrated by the following graphic images. Figure 1 shows the groove with a core winding. Figure 2 - schematic diagram of the core-layer wave winding stator at Z1=36, 2P=4, q=3, wk=1, where Z1- the number of the slots of the stator, p - number of pole pairs of the stator, q is the number of slots per pole and phase, wk- the number of turns of the coil (terminals) in a groove. Figure 3 - design of core-layer wave winding stator when wk1. The stator has a number of grooves Z1=Wf/(2m p), where Wf- number of turns of each phase, m is the number of phases of the stator winding. The winding is made of a wave winding with the number of rods in the groove equal to 1 (wk=1). When the rods are made JV is osname. The height of the rod hc(1) is selected of such size that the damping factor kdto the maximum frequency of the supply voltage was not less than two times the amount of the required range of speed control of induction motor. While the cross-sectional area of the groove is determined by the permissible current density is 5 to 10 A/mm2in the whole range of frequency variation of the supply voltage, the groove width bclimited to the value of valid induction in the tooth, not more than 1.9 Tesla. The height of the rod hcis selected as follows. Asking the required range of speed regulation, determine the value of the damping coefficient kdthat for the maximum frequency of the supply voltage should be not less than twice exceed the value of the control range. Then, using the expression
and
where pcθ- the resistivity of the rod at the design temperature Ohm*m, determine the height of the rod hc. It is known that the value of the maximal torque of an induction motor is inversely proportional to the magnitude of the inductance of the stator and rotor and is proportional to the flow rate of the clutch. Using a solid rod through effective is and displacement current active height h f(1) the rod is reduced, which reduces induced drag dissipation of the stator winding, and the maximum torque of the induction motor increases, which allows to increase the handling capacity of the induction motor and to increase the range of speed control. Due to displacement current will increase the resistance of the stator winding, which will somewhat reduce the maximum amount of time, but usually the effect of inductive reactance of the stator on the value of the maximum moment more intensely than active resistance. The displacement current will also cause uneven current density distribution along the height of the rod, however, this will not cause a substantial increase in heat, because the conductive material (usually copper) have a high thermal conductivity and heat will be just an average current density of the cross-section of the rod. Thus, due to the effect of the displacement current with increasing frequency supply voltage extended range of speed control of induction motor. The rods are placed in the grooves, then through jumpers windshields parts ensures the continuity of the connections in each phase. So, for phase a is determined beginning in the groove 1 and the connection terminals provided in the trail of the overall sequence: 1-12-19-30-2-11-18-29-3-10-28, from the groove 28 shows the end of phase a (X). The same pattern is maintained for phases b and C. In order to reduce the departure end parts of the rods are placed in the slots so that the group of rods equal to q, for the beginning of each phase (a, b, C) side 1 (figure 3) had a shorter flight than the end of each phase (X, Y, Z), and from the side windshields parts 2 Vice versa. Connecting the jumper between terminals is performed in the q planes. So, when q=3 (2) connection between terminals 1-12, 2-11, 3-10 are executed one after another in three dimensions. At the top of the jumper 1-12, as most long, 3-10 below, as the shortest. 1. Core wave stator winding of an induction motor, designed to operate in a large range of frequency variation of the supply voltage, characterized in that it is made of single-layer, and the terminals of the winding are made solid, the height of the rod is selected hcdetermined using expressions 2. Core wave winding according to claim 1, characterized in that each group of terminals, the number of which is equal to the number of slots per pole and phase q, the beginning of each phase on one side of the stator have a smaller flight windshields parts than the end of each of these phases, and on the other side of the stator on the contrary, while connecting the jumper between terminals located in different planes, the number of which is equal to q, so that more long jumpers are placed on top of the shorter.
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