Electric machine

FIELD: electricity.

SUBSTANCE: electric machine comprises a tight body, in the cavity of which a laminated stator core is installed with open slots, where winding coils are arranged, and a rotor. At the same time the laminated stator core is equipped with radial packet-to-packet ventilation channels, aerodynamically communicated longitudinal channels of the body with inlet holes communicated via a filter with environment, conductors of the winding of each stator slot are fixed with a wedge and a key insert contacting with it, the cross section of which is arranged as capable of fixing the key insert back under the slot wedge, and the section of the ledge corresponds to the section of the slot splint, the surface of the key insert back along its entire length is equipped with a longitudinal chute communicated with packet-to-packet ventilation channels of the stator core, volumes of key inserts protruding above the surface of the stator core cavity are combined into a tubular bushing, preferably made from segments, with formation of the inner surface of cylindrical shape, besides, in the cavity of the body there are cylindrical bushings installed, the diameter of the cavity in which is equal to the diameter of the tubular bushing, between ends of the stator core and ends of cylindrical bushings facing them there are thrust rings installed, the cavity of which exceeds the diameter of the cylindrical cavity of the stator core, equipped with a collar, covering a part of the outer surface of the cylindrical bushing. Thrust rings are made of non-magnetic material and are fixed with a stator core, cylindrical bushings are installed as capable of radial displacement relative to the longitudinal axis of the cylindrical cavity of the stator core, for this purpose contacts of bushings with the body, end shield and thrust rings are equipped with sealing rings made with the possibility of elastic deformation radially and along the relatively longitudinal axis of the stator core. The electric machine comprises an inductor with the outer cylindrical surface made of poles, permanent magnets, non-magnet wedges, a shaft, the length of which exceeds the length of the inductor, besides, with the inductor ends there are end cylindrical bushings fixed rigidly, which are made of a non-magnetic material and arranged aflush with the outer surface of the inductor.

EFFECT: invention provides for minimum sagging of a rotor, improved cooling of a rotor and a stator winding with simultaneous reduction of weight and dimension indices and higher resources of electric machines, including those operating under higher and high frequencies of rotation.

3 cl, 2 dwg

 

The invention relates to the field of electrical engineering, particularly electrical engineering.

Known high-speed electromachine, comprising a housing which has a capability to supply in its cavity cooling gas, equipped with face shields, and means for supplying a cooling gas to the nodes placed in the cavity of the housing, the stator core with winding, a cylindrical cavity which is placed with a gap, the rotor containing an inductor and a bearing unit (see Balagurov, VA, Galaev FF Electric generators with permanent magnets. - M.: Energoatomizdat, 1988. - 280 S.).

The disadvantage of this device is the inability of a significant reduction in weight and size characteristics of the device by increasing the speed of rotation of the rotor, since the load bearing characteristics of the sites do not permit high speed rotation of the rotor when the reduction of its radial dimension.

The closest to this invention the device is electromachine, comprising a housing, a cavity which is placed laminated stator core, provided with open slots, which are placed in the coil winding, and in the cylindrical cavity of the stator rotatably placed the rotor, a bearing unit which is made with the possibility of gas-dynamic support (see U.S. Pat the t of the Russian Federation No. 2385523, IPC H02K 5/16, 2010).

The disadvantage of this device is increased non-magnetic gap due to the presence of the sleeve sufficiently large thickness, which reduces the induction in the gap between the stator and the rotor and, consequently, affects the weight and dimensions of the machine.

The challenge which seeks the proposed solution is to improve mass and size parameters of electric machines by reducing the thickness of the sleeve down to zero through the use of specially organized gas bearing in the area of the frontal parts of the stator winding and the area of the non-magnetic gap between the stator core and the rotor, providing high long-term reliability of electrical machinery.

The technical result is achieved when the solution of the problem, reflected in reduction of weight and size and increase the service life of electric machines, including those running at higher and higher speeds. At the same time ensures a minimum deflection of the rotor, the cooling of the rotor and stator winding.

The problem is solved in that the electromachine, comprising a housing, a cavity which is placed laminated stator core, provided with open slots, which are placed in the coil winding, and in the cylindrical cavity of the stator rotatably placed the rotor, needle bearing is if the site is made with the possibility of gas maintenance, characterized in that the laminated stator core is provided with radial packet ventilation channels, aerodynamically reported longitudinal channel housing with receiving an air chamber communicated through the filter with the external environment, while the conductors of the winding of each slot of a stator fixed wedge and contact with him dowel insertion, the cross section of which is made to lock the backrest keyed inserts under the wedge groove and the surface of the backrest keyed insert along its entire length with longitudinal groove in communication with the packet ventilation channels of the stator core, with the amounts keyed inserts, protruding above the surface of the cavity of the stator core, combined in a tubular sleeve, preferably composed of segments, with the formation of the inner surface of the cylindrical shape, in addition, in the cavity of the body has a cylindrical sleeve, the diameter of the cavity of which is equal to the diameter of the tubular sleeve between the ends of the stator core and addressed to them the ends of the cylindrical bushings posted by retaining ring, the cavity of which exceeds the diameter of the cylindrical cavity of the stator core, provided with a flange covering portion of the outer surface of the cylindrical sleeve, and the thrust ring is made of niminit the first material and bonded to the stator core, in addition, the cylindrical sleeve is installed with the possibility of radial displacement relative to the longitudinal axis of the cylindrical cavity of the stator core, which contacts the collet housing, a face shield and thrust rings provided with sealing rings made with the possibility of the elastic deformation of radially and along the longitudinal axis of the stator core, in addition, the rotor comprises an inductor with an external cylindrical surface, made of poles, permanent magnets, non-magnetic wedges, shaft whose length exceeds the length of the inductor, with the ends of the inductor rigidly fastened end of the cylindrical sleeve made of nonmagnetic material, is placed flush with the outer surface of the inductor. In addition, the inductor is supplied by a bandage, the outer surface of which is attached a cylindrical shape corresponding to the diameter and the roughness of the outer surface of the cylindrical end sleeves, while the brace is made of high-strength heat-resistant non-magnetic material, preferably by winding carbon fibers, impregnated with a heat-resistant synthetic resins. In addition, the shaft is made hollow, with the possibility of connection with the shaft of the turbine and/or compressor.

Comparative analysis of the essential features of the proposed technical re is possible and essential features of the prototype and analogues demonstrates its compliance with the criterion of "novelty".

While the essential features of the characterizing part of the claims, solves the following functional tasks.

Signs of "laminated stator core is provided with radial packet ventilation channels, aerodynamically reported longitudinal channel housing with receiving an air chamber communicated through the filter with the external environment" provide efficient heat transfer from the windings and stator core.

Signs "...the conductors of the winding of each slot of a stator fixed wedge and contact with him keyed insert..." provide retention of the conductors of each winding groove in its cavity and the possibility of mounting the stator winding.

Signs indicating that the cross-section of the dowel insertion is made to lock the backrest keyed inserts under the wedge groove...", provide reliable retention of the dowel insertion in the groove, eliminating the possibility of arbitrary radial displacement in the direction of the surface of the rotor.

Signs indicating that the surface backless dowel insert along its entire length with longitudinal groove in communication with the packet ventilation channels of the stator core"to provide cooling of the coil.

Signs indicating that "the amounts keyed inserts, protruding above the surface of the cavity of the heart condition is the IR of the stator, United in a tubular sleeve, preferably made of segments, with the formation of the inner surface of cylindrical form, provided by cylindricall" "working" cavity of the stator (which is directly posted by the rotor and thereby provide conditions for use of the gas layer in the gap between the inner surface of the tubular sleeve and the rotor for the organization of gas-dynamic bearings.

Signs indicating that "in the cavity of the body has a cylindrical sleeve, the diameter of the cavity of which is equal to the diameter of the tubular sleeve", ensure that the surface of the hollow cylindrical bushings to increase the supporting surface of the gas bearing to increase its load carrying capacity.

Signs indicating that "between the end faces of the stator core and addressed to them the ends of the cylindrical bushings posted by retaining ring, the cavity of which exceeds the diameter of the cylindrical cavity of the tubular sleeve will cause the formation of a groove for collecting air from the working gap of the bearing.

Signs indicating that the thrust ring is provided "flange covering portion of the outer surface of the cylindrical sleeve, and the thrust ring is made of non-magnetic material and fixed to the stator core, to provide the provide the possibility of reliable longitudinal and radial suspension" end of the cylindrical bushing, and the use of elastic sealing rings seal these joints, avoiding destruction of the sealing rings.

Signs indicating that "cylindrical bushings installed with the possibility of radial displacement relative to the longitudinal axis of the cylindrical cavity of the stator core, which contacts the collet housing, a face shield and thrust rings provided with sealing rings made with the possibility of the elastic deformation of radially and along the longitudinal axis of the core, increase rotor stability by damping rubber o rings.

Signs indicating that the rotor contains an inductor with an external cylindrical surface, provide the possibility of gas-dynamic support.

Signs indicating that the length of the shaft is greater than the length of the inductor and with the ends of the inductor rigidly fastened end of the cylindrical sleeve made of nonmagnetic material, is placed flush with the outer surface of the inductor"meet each other of the lengths of the outer and inner cylindrical bearing surfaces used for the organization of gas-dynamic support.

Signs of the second claim of the invention provide increased strength of the rotor and retain the possibility of the ability to use its external surface as one of the supporting surfaces of the gas-dynamic bearings.

The signs of the third claim of the invention to reduce the mass and mass moments of inertia of the rotor and thereby extend the range of stability of a rotor in the form of "half rate of the vortex and increase the supply of static bearing capacity of gas-dynamic bearing with a slight decrease in strength of the rotor compared to the solid one-piece forged, in addition, this design prevents substantial deformation of the rotor in the radial direction from the centrifugal forces and thereby prevent jamming of the gas bearing.

Figure 1 shows a longitudinal section of the electrical machinery, figure 2 - cross section.

In the drawings is shown a housing 1, a stator core 2, the grooves 3, the winding 4, packet ventilation ducts 5, the longitudinal channels 6 of the housing 1 with an inlet holes 7, a filter 8, the wedges 9, keyed insert 10, the chute 11, a cylindrical sleeve 12, 13, retainer rings 14 and 15, a flange 16, the end panels 17 and 18, the sealing rings 19, 20, 21, 22, pole 23, the permanent magnets 24, non-magnetic wedges 25, shaft 26, an end of the cylindrical sleeve 27, 28, band 29, the gap 30, the axial petal gas-dynamic bearings (LGB) 31, 32, the thrust washer 33, the fan 34, push the sheets 35 and 38, the collar 36, anemones 37, split ring 39, the distance ring 40, the cover 41, the holes 42, 43, annular channels 44 and radial holes 45.

E is ectromelia comprises a sealed enclosure 1, in the cavity of which is a laminated stator core 2 from electrical steel (see figure 1, figure 2). On the outer diameter of the laminated stator core 2 is based on the housing 1 of the electrical machinery. The stator core 2 is provided with open grooves 3, which are placed in the coil winding 4. Laminated stator core 2 is provided with radial packet ventilation channels 5, aerodynamically reported longitudinal channels 6 of the housing 1 with an inlet holes 7 provided through the filter 8 with the external environment.

The conductors of the coils 4 of each groove 3 of the stator 2 is fixed wedge 9 and in contact with him keyed insert 10 of insulating material, for example of fiberglass, the cross section of which is made to lock the backrest keyed insert 10 under the wedge 9 of the groove 3. The volume of the dowel inserts 10, protruding above the surface of the cavity of the stator core 2 can be merged into segments. Moreover, the inner surface of the segments keyed inserts 10 attached to a cylindrical shape, providing the opportunity to "work" segments as sleeve gas-dynamic bearing. Surface backless dowel insert 10 along its entire length with longitudinal groove 11, is in communication with the packet ventilation channels 5 of the stator core 2.

In the cavity of the housing 1 is placed cylindricus is their sleeve 12, 13, the diameter of the cavity of which is equal to the diameter of the tubular sleeve between the ends of the stator core 2 and addressed to them the ends of the cylindrical sleeves 12, 13 posted by retainer rings 14 and 15, the cavity of which exceeds the diameter of the cylindrical cavity of the stator core 2, provided with a shoulder 16 covering a portion of the external surface of the cylindrical sleeves 12 and 13. Retainer rings 14, 15 are made of a nonmagnetic material and is bonded with the stator core 2. When this cylindrical sleeves 12, 13 are installed with the possibility of radial displacement relative to the longitudinal axis of the cylindrical cavity of the stator core 2, which contacts the cylindrical sleeves 12, 13 with the housing 1, the end panels 17 and 18 and the flange 16 of the thrust rings 14, 15 are equipped with sealing rings 19, 20, 21, 22, made with the possibility of the elastic deformation of radially and along the longitudinal axis of the stator core 2 (for example, rubber). In the cylindrical cavity segments keyed inserts 10 rotatably placed the rotor.

The rotor comprises an inductor made of poles 23, the permanent magnets 24, non-magnetic wedges 25, shaft 26, the length of which exceeds the length of the inductor. With the ends of the inductor rigidly fastened end of the cylindrical sleeve 27, 28, made of a nonmagnetic material, is placed flush with the outer surface of the of inductor. To ensure the mechanical strength of the inductor is supplied by a brace 29, the outer surface of which is attached a cylindrical shape corresponding to the diameter and the roughness of the outer surface of the cylindrical end of the sleeves 27, 28, and the brace 29 is made of high-strength heat-resistant non-magnetic material, is made, preferably, the winding of carbon fibers impregnated with a heat-resistant synthetic resins. The shaft 26 is hollow inside, with the possibility of connection with the shaft of the turbine and/or compressor.

Hydrodynamic bearing includes a bearing surface (made up of an inner cylindrical surfaces of the segments keyed inserts 10 and a cylindrical non-magnetic sleeves 12 and 13), the pin (composed of the outer surface of the brace 29 of the rotor and cylindrical bushings 27 and 28), and the gap 30 between them.

Axial bearing unit electrical machinery are axial petal gas-dynamic bearings (LGB) 31, 32, the thrust washer 33 with the fan blades 34.

The stator is assembled in the following order. From the stamped electrical steel sheets collect packages of the stator core 2 and fasten them by welding through grooves on the outer cylindrical surface of the package. In case 1 electrical machinery insert cover sheet 35 is fully inserted in the collar 36. Then in case 1 is installed packages heart is cnica stator 2 with verticali 37, push the sheet 38 and fix the collected set of packages and vetronic 37 using split ring 39. Later in the slots 3 of the stator core 2 install the slot insulation (not shown), stack winding 4 of the stator 2 and stuck her slot wedges 9. The winding 4 of the stator 2 is subjected to impregnation and drying. Inside the slots 3 of the stator 2 under the wedges 9 are tightly mounted on the adhesive segments keyed inserts 10 gas-dynamic bearing. Then grind the inner cylindrical surface segments keyed inserts 10 gas-dynamic bearing. Further, the inner cylindrical surface segments keyed inserts 10 gasdynamic bearing, cylindrical sleeves 12, 13 cover antifriction material, for example, WAP-3. In the annular grooves made in the thrust rings 14 and 15, close to their outer ends inserted cylindrical sleeve 12 and 13 with wearing them sealing rings 19, 20, 21, 22, and install the end panels 17 and 18.

In the cavity of the stator 2 is formed by a cylindrical sleeves 12 and 13 and the segments keyed inserts 10, insert the rotor. In the end shield 17 set LGB 31, remote ring 40, put the thrust washer 33, fix it by a nut, install LGB 32 and press the cover 41 of the received set of axial bearing Assembly.

Works electromachine trail is accordingly.

When the rotor blades of the fan 34 generate a vacuum, the air through the filter 8, the holes 7 in the housing 1 of the electrical machinery runs along the longitudinal channels 6, radial packet ventilation channels 5 of the stator core 2, the grooves 11 keyed inserts 10 and exits through the holes 42, 43. When this air cools the core and the stator winding 2. The air entering the ends of the bearing gap gasdynamic bearing, through the annular channels 44 and radial holes 45 in the segments keyed inserts 10 is fed into the trough 11 and goes out together with the cooling air.

1. Electromachine, comprising a housing, a cavity which is placed laminated stator core, provided with open slots, which are placed in the coil winding, and in the cylindrical cavity of the stator rotatably placed the rotor, a bearing unit which is made with the possibility of gas-dynamic support, characterized in that the laminated stator core is provided with radial packet ventilation channels, aerodynamically reported longitudinal channel housing with receiving an air chamber communicated through the filter with the external environment, while the conductors of the winding of each slot of a stator fixed wedge and contact with him dowel insertion, the cross section of which is done is but to lock the backrest keyed insert under the wedge groove, moreover, the surface backless dowel insert along its entire length with longitudinal groove in communication with the packet ventilation channels of the stator core, with the amounts keyed inserts, protruding above the surface of the cavity of the stator core, combined in a tubular sleeve, preferably made up of segments, with the formation of the inner surface of the cylindrical shape, in addition, in the cavity of the body has a cylindrical sleeve, the diameter of the cavity of which is equal to the diameter of the tubular sleeve between the ends of the stator core and addressed to them the ends of the cylindrical bushings posted by retaining ring, the cavity of which exceeds the diameter of the cylindrical cavity of the stator core, provided with a flange covering portion the outer surface of the cylindrical sleeve, and the thrust ring is made of non-magnetic material and fixed to the stator core, in addition, cylindrical bushings installed with the possibility of radial displacement relative to the longitudinal axis of the cylindrical cavity of the stator core, which contacts the collet housing, a face shield and thrust rings provided with sealing rings made with the possibility of the elastic deformation of radially and along the longitudinal axis of the stator core, in addition, the rotor comprises an inductor, VL is the stone cylindrical surface, made of poles, permanent magnets, non-magnetic wedges, shaft whose length exceeds the length of the inductor, with the ends of the inductor rigidly fastened end of the cylindrical sleeve made of nonmagnetic material, is placed flush with the outer surface of the inductor.

2. Electromachine according to claim 1, characterized in that the inductor is supplied by a bandage, the outer surface of which is attached a cylindrical shape corresponding to the diameter and the roughness of the outer surface of the cylindrical end sleeves, while the brace is made of high strength non-magnetic, heat-resistant material, preferably by winding carbon fibers, impregnated with a heat-resistant synthetic resins.

3. Electromachine according to claim 1, characterized in that the shaft is made hollow, with the possibility of connection with the shaft of the turbine and/or compressor.



 

Same patents:

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FIELD: electricity.

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FIELD: electricity.

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1 dwg

FIELD: electricity.

SUBSTANCE: electric machine rotor comprises a hollow shaft of non-magnetic material and a cylinder placed on it made of magnetic-soft material with high magnetic permeability, in longitudinal radial slots of which there are permanent magnets fixed with non-magnet metal wedges, the outer surface of which complies with curvature of the outer surface of the cylinder, at the same time, according to this invention the cylinder is rigidly fixed to the hollow shaft and non-magnet metal wedges along the entire area of their contacts, and rotor ends are rigidly fixed with cylindrical bushings made of non-magnetic material, coaxial and rigidly fixed with the hollow shaft, besides, cylindrical bushings are equipped with through bores aligned in parallel to the longitudinal axis of the cylinder, at the same time the through bores match longitudinal radial slots of the cylinder in quantity and location and exceed their dimensions by the value sufficient for free passage of permanent magnets through them, besides, the permanent magnets are equipped with facilities of their fixation in longitudinal radial slots of the cylindrical bushings, besides, the external surface of the cylinder is equipped with a bandage made by winding of a flexible thread from high-strength non-magnetic material, for instance, a carbon fibre, at the same time the external surface of the bandage is of cylindrical shape that complies in diameter and roughness to the specified cylindrical bushings. Threads in the bandage are fixed by impregnation with hardening synthetic resins. Facilities for fixation of permanent magnets in longitudinal radial slots of the cylinder are made of parts from non-magnetic material that follow the cross section of through bores in the cylindrical bushings and are tightly installed in the through bores, in contact with the ends of the permanent magnets. Besides, the free end of at least one cylindrical bushing is closed with a screwed-in or a pressed cover. Besides, to fix the rigidly connected parts of the rotor, vacuum-diffusion welding is used.

EFFECT: considerable improvement of the electric machine rotor mechanical strength, increased resource during its operation at increased and high frequencies of rotation due to arrangement of the gas bearing between the bushing placed in the stator and fixed in the end shields, and the rotor, which provides for the possibility to reject frictionless bearings, this electric machine rotor does not have sagging, since the rotor surface is used as the journal.

5 cl, 4 dwg

FIELD: electricity.

SUBSTANCE: electric machine rotor comprises a hollow shaft of non-magnetic material and a cylinder placed on it made of magnetic-soft material with high magnetic permeability, in longitudinal radial slots of which there are permanent magnets fixed with non-magnet metal wedges, the outer surface of which complies with curvature of the outer surface of the cylinder, at the same time, according to this invention the cylinder is rigidly fixed to the hollow shaft and non-magnet metal wedges along the entire area of their contacts, and rotor ends are rigidly fixed with cylindrical bushings made of non-magnetic material, coaxial and rigidly fixed with the hollow shaft, besides, cylindrical bushings are equipped with through bores aligned in parallel to the longitudinal axis of the cylinder, at the same time the through bores match longitudinal radial slots of the cylinder in quantity and location and exceed their dimensions by the value sufficient for free passage of permanent magnets through them, besides, the permanent magnets are equipped with facilities of their fixation in longitudinal radial slots of the cylindrical bushings.

EFFECT: considerable improvement of the electric machine rotor mechanical strength, increased resource during its operation at increased and high frequencies of rotation due to arrangement of the gas bearing between the bushing placed in the stator and fixed in the end shields, and the rotor, which provides for the possibility to reject frictionless bearings, this electric machine rotor does not have sagging, since the rotor surface is used as the journal.

4 cl, 4 dwg

FIELD: electricity.

SUBSTANCE: invention refers to the design of non-contact magnetic electric machines with electromagnetic reduction with axial excitation from constant magnets and can be used in automation systems, in military and space engineering, in domestic equipment, as motorised wheels, motorised drums, starter-generators, electric steering wheel boosters, lifting mechanisms, electric drives of concrete mixers, belt conveyors, liquid transfer pumps, mechanisms with high torques on the shaft and low frequencies of the shaft rotation, as direct drives without using any mechanical reduction gears, as direct drives without using any mechanical reduction gears, as well as wind-driven generators, hydraulic generators, high-frequency electric generators, synchronous frequency converters, and as controlled stepped hybrid motors. Non-contact magnetic electric reduction machine with axial excitation includes stator the armature core of which consists of insulated electrotechnical steel plates with high magnetic permeability, and has salient poles on inner surface of which there are elementary teeth, coil m-phase armature winding, each coil of which is arranged on the appropriate salient pole of armature, and ferromagnetic rotor without winding, which contains inductor with odd and even toothed cores with equal number of teeth on each core; odd and even toothed cores of inductor are made in the form of packs consisting of insulated electrotechnical steel plates with high magnetic permeability; number of inductor cores is not less than two; even inductor cores are offset relative to odd ones in tangential direction through the half of their toothed division; between magnetic conductors of inductor there located are ring-shaped layers of segmental constant magnets axially magnetised in one direction. At that, for serviceability of non-contact magnetic electric reduction machine with axial excitation there shall be met certain relations between the number of salient poles of armature, number of elementary teeth on salient pole of armature, number of salient poles of armature in phase, total number of armature teeth, number of teeth on each inductor core and number of phases of m-phase armature winding.

EFFECT: manufacture of high-technology constructions of non-contact magnetic electric reduction machines with axial excitation with high electromagnetic reduction and enlarged capabilities of their application at maintaining high energy parameters and operating characteristics.

5 cl, 5 dwg, 1 tbl

FIELD: electricity.

SUBSTANCE: invention refers to the design of non-contact synchronous electric machines with axial excitation and can be used in wide range of frequencies of machine shaft rotation (from units of revolutions per minute to several tens of thousands of revolutions per minute) in automation systems, independent electric equipment systems, in military, space engineering, on aviation and automobile transport, as traction controlled and non-controlled electric actuators, wind-driven generators, multiphase synchronous motors, multi-phase high-frequency synchronous AC electric generators and multiphase generators of frequency converters (including three-phase systems), as well as at rectification of output variable voltage and current of generators by means of semiconductor rectifying devices and with possibility of using smoothing filters to reduce fluctuations of output parameters - as DC (rectified current) power supply sources. Stator of the proposed magnetoelectric non-contact machine with axial excitation contains odd and even armature cores. Each core of armature has laminated pack consisting of insulated electrotechnical steel plates with high permeability with salient poles of armature. Cores of armature, the number of which is at least two, are fixed in non-magnetic housing. On salient poles of armature there located is coil multi-phase winding of armature, each coil of which envelopes one of salient poles of armature of each armature core, which are located opposite each other in axial direction. Ring-shaped layers of segmental constant magnets are located between armature cores. In ring-shaped layers the constant magnets adjoin odd armature cores in axial direction by means of one magnetic polarity, and they adjoin even cores with the other magnetic polarity. Number of ring-shaped layers of segmental constant magnets is one less than the number of armature cores. Rotor without winding includes non-magnetic shaft with soft magnetic bushing put on it, on which there coaxially located are odd and even rotor magnetic conductors with pole projections, which are represented with laminated packs and consist of insulated electrotechnical steel plates with high magnetic permeability. Number of magnetic conductors of rotor is equal to number of armature cores. Odd and even rotor magnetic conductors are located relative to the appropriate odd and even armature cores and have the same active length in axial direction. Even rotor magnetic conductors are offset relative to odd magnetic conductors in tangential direction through the half of pole pitch of rotor magnetic conductor. At that, certain ratios are fulfilled between the number of salient armature poles, number of phases of multi-phase coil winding of armature, number of salient poles of armature in phase and number of pole projections of each magnetic conductor of the rotor.

EFFECT: obtaining reliable and highly repairable design, appropriate to the material, of multi-phase non-contact magnetoelectric machine with axial excitation with high energy properties and operating characteristics at wide range of shaft rotation frequencies and with various ratio of active length and bore diameter of machine stator.

16 cl, 4 dwg

FIELD: electricity.

SUBSTANCE: non-contact reduction machine with axial excitation includes stator with housing made from soft magnetic material with odd and even packs of stator, which are laminated and consist of insulated electrotechnical steel plates with high magnetic permeability, and the number of which is not less than two, non-magnetic shaft; stator packs contain salient poles uniformly distributed along cylindrical surface, on inner surface of which there are elementary teeth; stator packs in tangential direction are located so that axes of their salient poles located opposite each other in axial direction coincide; odd and even rotor packs the number of which is equal to number of stator packs are pressed on the appropriate odd and even magnetic conductors of rotor, which are put on non-magnetic bushing installed on non-magnetic shaft; rotor packs contain teeth uniformly distributed along cylindrical surface; even packs of rotor are offset relative to odd rotor packs in tangential direction through the half of tooth division of rotor pack; between rotor magnetic conductors there located are ring-shaped layers of constant magnets axially magnetised in one direction; number of ring-shaped layers of constant magnets is one less than number of rotor packs; on salient poles of stator packs there is coil m-phase armature winding each coil of which in axial direction envelopes the appropriate salient poles of even and odd stator packs of one pole of each pack; excitation winding of inductor is made in the form of ring-shaped coils with longitudinal axis coinciding with longitudinal axis of machine; number of ring-shaped coils of excitation winding of inductor is one less than the number of stator packs. At that, for serviceability of machine there shall be certain relations between the number of salient poles of armature, number of elementary teeth on salient pole of armature, number of salient poles of armature in phase, total number of armature teeth, number of teeth on each pack of rotor and number of phases of m-phase armature winding.

EFFECT: manufacture of high-technology constructions with possibility of using frame coils of armature winding of non-contact electric reduction machines with axial combined excitation and using electromagnetic reduction in wide ranges at providing high energy parameters and operating characteristics with possibility of smooth and deep control by means of output parameters.

9 cl, 5 dwg, 1 tbl

FIELD: electricity.

SUBSTANCE: electrical machine of double rotation includes stator, rotors installed so that they can rotate, the first blades that are connected to the first rotor and are rotated with the first rotor in the first direction, the second blades that are connected to the second rotor and are rotated with the second rotor in the second direction, shafts of rotors, and bearings that allow rotation of shafts, load-carrying housing; the first blades and the second blades are arranged outside the housing; stator is made in the form of individual teeth with winding without yoke, and rotors are made in the form of concentric sleeves from material with high magnetic permeability, which are located on outer and inner side of stator; on sleeves there fixed are radially magnetised constant magnets; polarity of neighbouring constant magnets alternates; on each tooth there located is concentric winding insulated from housing; number of poles of the first rotor is equal to the number of periods of the first fundamental harmonic of magnetomotive force of stator winding; number of poles of the second rotor is equal to the number of periods of the second fundamental harmonic of magnetomotive force of stator winding; rotors are not attached to each other and directions of their rotation are opposite.

EFFECT: improving reliability of electric machine of double rotation at simultaneous exclusion of transmission to its stator of reactive moment and providing the possibility of using air flows with low linear speeds for operation of this machine in generator mode.

9 cl, 3 dwg

FIELD: electricity.

SUBSTANCE: rotor, in particular, of a turbogenerator comprises a winding made of coils (1) from current-conducting strands with turns covering a pole and laid into slots (2), at the same time, according to the invention, each coil (1) has concentric arrangement of turns placed in one layer in all slots (2), related to the pole division of the rotor. This invention is especially relevant for synchronous nonsalient-pole electric machines with air cooling.

EFFECT: higher capacity of a synchronous nonsalient-pole electric machine without variation of its rotor dimensions.

2 cl, 3 dwg

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