Terminal asynchronous electrical machine |
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IPC classes for russian patent Terminal asynchronous electrical machine (RU 2522898):
 Electric machine with double axial fan / 2502179
Proposed electric machine including stator (1), rotor (2) having shaft (3) that is equipped with radial and axial cooling channels (10, 11) and acts like a paddle-blade fan, as well as axial fan (12) located coaxially to shaft (3) and supplies cooling agent to axial cooling channels (11). Axial fan (12) is made in the form of a double axial fan and equipped with the first rim (14) of blades, which is enclosed inside funnel-shaped pipe (15) and connected to it so that it cannot be rotated. Smaller hole of funnel-shaped pipe (15) is in close proximity to axial cooling channels (11) of rotor (2). Besides, axial fan (12) is equipped with the second rim (19) of blades, which is rigidly fixed on external perimetre of pipe (15) and serves for delivery of cooling agent (1). Therefore, effective cooling both of a stator and a rotor with a cooling agent flow is provided.
 Electrical machine ventilation system / 2438224
Under pressure action of fans (6) the air is supplied to inlet collector (8); from it to radial channels (7) and (18) of ventilation zones (15). Air is supplied from radial channels (7) to gap (10) and ventilation channels (12) of rotor; then, through gap (10) and radial channels (7) of ventilation zones (16) via outlet collectors (11) it flows to low pressure area. The air is also supplied from radial channels (18) via outlet collectors to low pressure area. Tangential air flow in channels (7) of ventilation zones (15) and (16) is performed through bypass holes (25). Tangential air flow in channels 18 is performed through bypass holes (20). Introduction of ventilation channels of stator, which are closed on the side of the gap, to zones (12) and (13) will allow reducing the temperature of active parts of stator in outlet zones approximately by 25°C and rotor winding temperature approximately by 10°C. At that, temperature field of active parts as to length of machine becomes more uniform.
 Electrical machine ventilation system (versions) / 2437195
Electrical machine includes rotor, stator with underslot and radial ventilation channels. As per the design of distance pieces the radial channels are divided into two types; in the channels of one type there installed are distance pieces shutting off the inlet of cooling flow to underslot channels along their perimetre, and in channels of the other type - on the side of the space between the housing and back of stator; at that, sets of channels of each type form ventilation zones alternating in axial direction, at the boundaries of which there installed in the gap are annular dividing partitions, and in the rotor there made are ventilation channels each of which is interconnected with the above ventilation zones. As per the second version, radial ventilation channels closed on the side of the gap alternate in axial direction with radial ventilation channels opened into the gap and divided as per the design of distance pieces into two types.
 Electrical machine / 2408964
Proposed electric machine (1) consists of stator (4) and rotor (3), note that rotor (3) has some cooling channels (8) arranged in radial direction and first (5a) and second end surface (5b). Each end surface has a ventilation unit (6) that consists of at least two ventilating segments (7). Note that one ventilating segment (7) corresponds to one cooling channel (8) and alternately is located at the first (5a) and the second end surface (5b). Also, according to the present invention the said ventilating segment (7) has at least one air supply channel (7a) and two air guide louvers (7b, 7c) that are located at both sides of the air supply channel (7a). The said air guide louvers (7b, 7c) of two adjacent ventilating segments (7), at least in some areas overlap and contact each other.
 Electric machine with rotor cooled inside / 2399141
Proposed electric machine comprises stator pack and rotor in single vessel, which has inner cooling circuit made of rotor cooling channels passing through rotor in axial direction and arranged on two concentric circles, and this circuit is designed to circulate gaseous cooling substance, at the same time in machine on the first end side of rotor there are fan blades provided, as well as the first facility for direction of cooling substance from channels of rotor cooling on one of both concentric circles through front part of winding to channels of rotor cooling on another of both concentric circles, therefore, optimal cooling is provided for zones, in which losses heat removal is difficult.
 Turbo generator with gas cooling system / 2379813
Invention relates to electrical engineering and can be used in producing turbo generators and the like machinery that requires cooling of electrical machines. In compliance with proposed invention, turbo generator comprises stator casing, rotor and stator and open system of gas cooling, and differs from know designs in that rotor core has axial channels and is arranged in stator casing to form gas passages between stator core outer surface and casing inner surface. Gas impermeable bulkhead is arranged inside stator casing, parallel to turbo generator shaft, as well as at least two gas feed manifolds and two gas discharge manifolds. Note here that gas feed manifolds are arranged on stator casing, one searing on the side of front end face shield and the other one being located on the side of rear end face shield. Mind that one discharge manifold is arranged in rear end face shield and the other one oseta in front end face shield.
 Electric current generator using open-circuit gas cooling system / 2303324
Novelty is that proposed electric current generator that has open-circuit gas cooling system, stator frame, rotor, and stator is provided in addition with gas-tight barriers installed within stator frame at stator iron stack ends, gas discharge manifold mounted on outer surface of stator frame, and gas supply manifolds, on its ends.
 Gas-cooled electrical machine / 2284626
Proposed electrical machine has its rotor cooled with gas delivered from air gap by means of intake-deflector system and stator winding placed in its core slots wherein it is secured by means of lengthwise built-up wedges with bosses protruding to air gap area; these wedges are installed in vicinity of mentioned intakes. Installation of groups of slot wedges alternating lengthwise of stator core projecting to air gap and disposed opposite rotor winding intakes tangibly improves cooling conditions for stator and rotor windings and cores due to eliminating local effect of pressure rise at projecting wedges of stator in vicinity of rotor winding deflectors without noticeable degradation of rotor cooling conditions.
 Electrical machine stator cooling system / 2246786
Proposed cooling system has stator core 1 whose slots 3 accommodate winding 2 and cooling ducts formed by means of distance pieces 5 and arranged for communication with space between stator back and frame. Novelty is that slots 3 are provided with sub-slot ducts 4 communicating with space behind butt-end parts of stator core 1; installed in cooling ducts are U-shaped distance pieces 6 whose side surfaces are facing stator bore; there distance pieces enclose sub-slot ducts 4.
 Device for supplying a coolant to the ring contact of the electric machine / 2216840
The invention relates to the field of electrical engineering, namely, devices for the cooling of electrical machines
 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.
 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.
 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: proposed electric machine is characterised by forming winding of each stator out of concentric coils laid in one layer on the circle periphery of toroidal magnetic conductor in the A, C, B order. Rotor of split thickness consists of at least two discs separated by air gap and featuring slots for installation of common ferromagnetic inserts. Stators are positioned so that same phase coils of opposing stators are placed at three hundred sixty electrical degrees against each other. EFFECT: enhanced power parameters, reduced heat load, dimensions and weight of terminal asynchronous machines. 4 cl, 2 dwg
The invention relates to electrical engineering, namely to end the asynchronous electric machines, and can be used in fixed installations and transport. Known end asynchronous electric machine (e.g., SU 1008851, 1983), with a one-sided design of the stator. The main disadvantage of these machines is the increased attraction of the rotor to the stator and the associated increased wear in the bearings rolling. Known bilateral end asynchronous electric machine (EN 2232459, 2004), with two toroidal stator, between which is mounted a rotor consisting of a Central disk with a fixed magnetic circuit. Each stator mentioned machines are equipped structurally independent of the supports with the adjusting device and system installation screws. The advantages of this machine should include the possibility of accurate adjustment of the working gap with the adjusting device, and its shortcomings are related to the fact that the rotor comprises a magnetic core for tangential circuit of the magnetic flux generated by each stator separately. This means that in the car there are axial forces occurring during the interaction of each pair of the stator-rotor" similar forces in a one-sided machine. Compensation forces unilateral tension imposed on the system adjustment the gap. Known end asynchronous electric machine, in which the elimination of the source of axial forces achieved by the formation of cross-cutting of the magnetic flux through the rotor from one stator to the other, for which the total working gap remains unchanged, for example an asynchronous motor with two toroidal stators and a disc rotor made of a nonmagnetic conductive material and containing a ferromagnetic insert (US 6809453, 2004, Fig), adopted as the closest analogue (prototype) of the claimed invention. In the prototype in order to reduce the dimensions of the winding is formed of coils, each of which covers one tooth of the stator. The disadvantage of this winding structure is a low winding factor. Another disadvantage of the prototype is increased non-magnetic gap due to continuous serration on opposite stators. Also in the prototype there is no heat removal from the most loaded of the working parts of the rotor and the stator, and a continuous toothed structure of the stator is not possible to place in the magnetic circuit of the stator ventilation ducts without deteriorating conditions (reducing cross section) for the passage of the working magnetic flux, or requires an increase in the overall dimensions. In addition, the prototype of the proposed composite design the stator, therefore, in the zones of adjacency armoloy part and the sockets of the area produced many spurious gaps for the working magnetic flux and shaped the contours of eddy currents, which increases losses in steel laminations. The task implemented by the invention is aimed at creating a compact end of an asynchronous electric machine with improved power characteristics and the conditions for heat dissipation. The technical result obtained by use of the invention is to improve energy performance by increasing the winding ratio and the reduction is equivalent to non-magnetic gap, and reduction in thermal loads, masses and dimensions of asynchronous machines. The technical result is achieved by the end of the asynchronous electrical machine containing two toroidal stator with windings formed by phases a, b, C, arranged in the slots of magnetic cores, each of the stators, and a disc rotor made of a conductive nonmagnetic material with ferromagnetic inserts placed in the grooves according to the invention, the winding of each stator formed of concentric coils arranged in a single layer on the circumference of the magnetic core in the sequence a, C, and the stators are installed relative to each other that is they way the coils of the same name opposite phases of the stator are shifted to each other at three hundred and sixty electrical degrees. Additional distinguishing features are that: the rotor is made of a composite thickness of at least of two disks separated by an air gap, the said grooves which serve to accommodate the shared ferromagnetic inserts; in the rotor disks are made axial ventilation ducts; in the magnetic circuit of each of the stator is covered by a concentric coil of one phase, a radial ventilation channels. Proposed by the present invention execute and vzaiemorozuminnia windings of stators provides increased winding factor that increases the use of the material in the winding. The end windings have a minimum overhang, and the frontal part of the coils of opposite phases have no intersection. The design of the windings reduces the number of grooves on each stator, which is equivalent to minimizing non-magnetic gap between the stators, improves the energy performance of the machine and leads to simplification of the structure. Manufacturing of composite rotor thickness, at least two disks separated by an air gap, in conjunction with axial ventilation channels in the inner part of the disk rotor FD which creates conditions for heat dissipation and self-ventilation of the machine, provides intense heat from the most loaded part of the rotor, which promotes a more efficient use of the machine and improve its energy performance. On the drawings: figure 1 gives a General view of the proposed machine section (example); figure 2 - diagram of the configuration of the windings of the stators. The implementation of the invention End of an asynchronous electric machine includes a housing 1 in which is placed opposite toroidal stators 2 and 3 and fixed on the support shaft 4 with the disk rotor 5. The winding of each of the stators 2 and 3, formed by phases a, C, and consists of concentric coils 6 and 7, respectively, arranged in the grooves of the respective magnetic circuits 8 and 9. The stators 2 and 3 is set relative to each other so that their coils 6 and 7 of the same name phase shifted to each other at three hundred and sixty electrical degrees that generates consistent field created by the two stators. The uniform magnetic flux generated by the windings of the two stators, passes through subcool zone of the rotor. This embodiment and the arrangement of the windings of the stators helped to create in the working gap of the running magnetic field with increased winding ratio and thereby improve the use of the material winding without complicating the construction of the coils. Ro is a PR 5 are sectional thickness, at least two disks 10 and 11 separated by an air gap 12, which is executed axial ventilation ducts 13, which provides intense heat from the most loaded parts of the rotor. Common ferromagnetic insert 14, which is necessary for passing the working magnetic flux from one stator to the other, simultaneously, serve as the blades of the centrifugal fan formed by the specified rotor design. The rotor may include additional elements (not shown), for example, for the formation of directions of air flow. In the specific example embodiment of the invention the ferromagnetic inserts 14 are located radially (figure 1) or may be angled relative to the radius. The skewness value is determined from the necessary compensation Zubovich harmonics or increasing the pressure of the pressurizing air flow. Due to the proposed design of the winding in the magnetic stators are formed bezzubova zone that allows without increasing the cross section of the magnetic circuits to be placed on these areas of radial ventilation ducts 15 of any suitable shape, for example cylindrical. In addition, the design of the winding reduces the number of grooves on each stator, which leads to simplification of the structure. The presence bezzubova zone in the magnetic circuit is of Tatarov reduces the equivalent non-magnetic gap between the stator and improves the energy performance of the machine, and educated thus vents together with the aforementioned design of the rotor 5 improve heat dissipation from the stator elements. In areas of the joining armoloy part and the sockets zone stators are made, unlike the prototype, the one that reduces losses in the steel and increases the working magnetic flux, reduces the eddy-current loss and also increases the rigidity of the magnetic core and the stator as a whole. The work of the proposed asynchronous electric machine is identical to the principle of conventional asynchronous electric machine with squirrel-cage rotor and does not require further clarification. Features of functioning of the machine are that: concentric coils of the stators 7 and 8 are connected in a three-phase winding with a phase sequence a, C, B. Each of the stators with its winding does not generate a traveling magnetic field in the working gap of the motor, and only their relative positioning allows you to create a traveling field in the gap between the stators. Traveling magnetic field created by the stator induces in the disks of the rotor currents and drags the rotor 5, creating on the shaft torque. The design of the rotor 5 in addition to the main functional purpose allows you to use it as a fan of plasmafiltration machine and using ferromagnetic inserts 14, role of the blades of this centrifugal fan, through the axial channels of the rotor 5 air gap 12 between the disks 10 and 11 and the radial channels inside the stators 2 and 3 is the mixing of air masses inside the machine housing, and the discharge air flow from the machine center to its edge. 1. End of an asynchronous electric machine, comprising two toroidal stator with windings formed by phases a, b, C, arranged in the slots of magnetic cores, each of the stators, and a disc rotor made of a conductive nonmagnetic material with ferromagnetic inserts placed in the grooves, characterized in that the winding of each stator formed of concentric coils arranged in a single layer on the circumference of the magnetic core in the sequence a, C, and the stators are installed relative to each other so that the coils of the same name opposite phases of the stator are shifted to each other at three hundred and sixty electrical degrees. 2. Machine according to claim 1, characterized in that the rotor is made of a composite thickness of at least of two disks separated by an air gap, the said grooves which serve to accommodate the shared ferromagnetic inserts. 3. Machine according to claim 1, characterized in that the rotor disks are made axial load is haunted ventilation ducts. 4. Machine according to claim 1, characterized in that the magnetic circuit of each of the stator is covered by a concentric coil of one phase, a radial ventilation ducts.
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