Electric machine rotor

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

 

The invention relates to the field of electrical engineering, in particular to electrical engineering and can be used for designing high-speed synchronous generators and motors, provide high power at low weight and size parameters.

Known rotor of the electric machine containing the yoke placed on it by the permanent magnets of opposite polarity, which are pole pieces. On the outer surface of the pole pieces concentric with the axis of the rotor is made of an annular groove, used for hosting bandage covering all pole pieces (see SU 1677806 A1, H02K 21/14, 1989).

At high frequencies of rotation of the rotor decreases reliability due to increased mechanical stresses in the brace. The reliability of the device can be increased by increasing the cross section of the brace, which will lead to an increase in the weight and size of the device and a slight increase in strength.

The closest to this invention is the rotor electrical machinery, containing a hollow shaft of a nonmagnetic material and put on his hat, made of soft-magnetic material with high magnetic permeability, longitudinal radial slots which are located permanent magnets fixed nonmagnetic use the mi wedges, the outer surface of which corresponds to the curvature of the outer surface of the cylinder (see Balagurov, VA, Galaev FF Electric generators with permanent magnets. - M.: Energoatomizdat, 1988, p.30, RIS).

A disadvantage of the known devices is the inability to provide high capacity with limited weight and the characteristics of the device, which could be obtained by increasing the frequency of rotation of the rotor, due to insufficient mechanical strength of the rotor, leading to the possibility of fracture during operation high speeds.

The challenge which seeks the proposed solution is to increase the mechanical strength of the long rotor, providing the possibility of its use in the increased peripheral speed without increasing its weight and size parameters, and preventing excessive radial extension of the rotor during the rotation to use the outer surface of the rotor as a journal gas bearing.

The technical result is achieved when the task is making use of the gas layer in the gap between the sleeve disposed in the stator and is fixed to the end boards, and the rotor electrical machinery for the organization of the gas bearing and C is the account of the refusal of rolling bearings. In addition, increased resource electrical machinery when working at higher and higher speeds. This deflection of the shaft of the electric machines is missing, which is very essential for a long powerful electric machines.

To solve this problem, the rotor electrical machinery, containing a hollow shaft of a nonmagnetic material and put on his hat, made of soft-magnetic material with high magnetic permeability, longitudinal radial slots which are located permanent magnets fixed non-magnetic metal wedges, the outer surface of which corresponds to the curvature of the outer surface of the cylinder, characterized in that the cylinder is rigidly connected with a hollow shaft and a non-magnetic metal wedges over the entire area of their contact, the ends of the rotor rigidly attached to a cylindrical sleeve made of nonmagnetic metal, coaxially and rigidly fixed to the hollow shaft, in addition, cylindrical the sleeve is supplied through the grooves oriented parallel to the longitudinal axis of the cylinder, with the through grooves are the same in number and location with longitudinal radial slots of the cylinder and exceed their size by an amount sufficient to free passage through them of permanent magnets, in addition, permanent magnets provided with means locking them in PR the longitudinal radial slots of the cylinder, in addition, the outer surface of the cylinder is equipped with a bandage made by winding at him flexible strands of high-strength non-magnetic material, for example carbon fiber, and the outer surface of the brace attached to a cylindrical shape corresponding to the diameter and surface roughness of the cylindrical sleeves. When this thread in the band bonded by impregnation curing synthetic resins.

Fixation means of permanent magnets in a longitudinal radial slots of the cylinder is made in the form of parts of a nonmagnetic metal, repeating cross-section of the through-grooves of the cylindrical sleeve, and placed with tightness in through the grooves in contact with the ends of the permanent magnets. In addition, the free end of the at least one cylindrical sleeve screw-in closed or sealed cover. In addition, for fastening rigidly connected details of the rotor used vacuum diffusion welding.

Comparative analysis of the essential features of the proposed technical solutions 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.

The sign "...the cylinder is rigidly fastened the hollow shaft and a non-magnetic metal wedges over the entire area of their contact, the ends of the rotor rigidly attached to a cylindrical sleeve made of nonmagnetic metal, coaxially and rigidly fixed to the hollow shaft..." allows the electric machine and allows you to increase the strength of cylindrical sleeves, significantly reduce their expansion in the radial direction against the centrifugal force and thereby prevent jamming of the gas bearing at high peripheral speeds due to the small radial clearance of the gas bearing.

The sign "...cylindrical sleeve provided with continuous grooves oriented parallel to the longitudinal axis of the cylinder, with the through grooves are the same in number and location with longitudinal radial slots of the cylinder and exceed their size by an amount sufficient to free passage through them of permanent magnets..." allows you to build inductor after vacuum diffusion welding.

The sign "...permanent magnets provided with means locking them in longitudinal radial slots of the cylinder...allows you to prevent the displacement of the magnets in the axial direction and thereby prevent rotor imbalance during rotation.

Signs "...the outer surface of the cylinder is equipped with a bandage made by winding at him flexible strands of high-strength non-magnetic material is a, for example, carbon fiber...allow you to increase the strength of the rotor and significantly reduce its expansion from centrifugal speeds at the outer diameter of the rotor up to 400 m/s or more, to prevent jamming of the gas bearing at high peripheral speeds,

The sign "...the outer surface of the brace attached to a cylindrical shape corresponding to the diameter and surface roughness of the cylindrical sleeves..." is designed to provide the necessary cylindrical surface of the trunnion and the roughness of its surface to use this surface as a journal gas bearing.

The sign "...thread in the band bonded by impregnation curing synthetic resins..." allows you to increase the roughness of the surface of the bandage.

The sign "...the means of fixing the permanent magnets in a longitudinal radial slots of the cylinder is made in the form of parts of a nonmagnetic metal, repeating cross-section of the through-grooves of the cylindrical sleeve, and placed with tightness in through the grooves in contact with the ends of the permanent magnets..." specifies the variant of implementation tools-commit.

The sign "...the free end of the at least one cylindrical sleeve screw-in closed or sealed by the cover...you can perform sarcoidosia after vacuum diffusion welding of the entire rotor, and the presence of caps can reduce ventilation losses.

The sign "...for fastening rigidly connected details of the rotor used vacuum diffusion welding...allows you to provide additional strength and rigidity.

The claimed device is illustrated in the drawings, where figure 1 shows a longitudinal section of the rotor, figure 2, 3rd cross section, figure 4 shows a longitudinal section of the electrical machinery.

The rotor electrical machinery contains the hollow shaft 1 of a nonmagnetic material, and put on him the cylinder 2 made of soft-magnetic material with high magnetic permeability, longitudinal radial slots 3 which is placed permanent magnets 4, fixed non-magnetic metal wedges 5, the outer surface of which corresponds to the curvature of the outer surface of the cylinder 2. The cylinder 2 is rigidly fixed to the hollow shaft 1 and the nonmagnetic metal wedges 5 over the entire area of their contact. The ends of the rotor are rigidly fastened to the cylindrical bushings 6, 7 made of a nonmagnetic metal, coaxially and rigidly fixed to the hollow shaft 1. Cylindrical sleeves 6, 7 are supplied through the grooves 8, which are oriented radially and parallel to the longitudinal axis of the cylinder 2, while the through grooves 8 are the same in number and location with longitudinal radial force is generated by the grooves 3 of the cylinder 2 and higher dimensions by an amount enough for free passage through them of permanent magnets 4. Permanent magnets 4 provided with means fixing 9 in the longitudinal radial slots 3 of the cylinder 2. Fixation means 9 permanent magnets 4 in the longitudinal radial slots 3 of the cylinder 2 is made in the form of parts of a nonmagnetic metal, repeating cross-section of the through-grooves 8 of the cylindrical sleeve 7, and is placed with tightness in through the grooves 8 of the cylindrical sleeve 7, in contact with the ends of the permanent magnets 4. The end face of the cylindrical sleeve 6 is closed by a cover 10, which is rigidly fixed to this sleeve. On the shaft 1 put the lock ring 11 to prevent axial movement of the magnets 4 in the slots 3. The sleeve 7 is closed by a removable cover 12. Outer surface of the cylinder 2 is provided with brace 13, made by winding at him flexible strands of high-strength non-magnetic material, such as carbon fiber. The external surface of the band 13 is attached to a cylindrical shape corresponding to the diameter and surface roughness of the cylindrical sleeves 6, 7. When this thread in the brace 13 is bonded by impregnation curing synthetic resins.

For fastening rigidly connected details of the rotor used vacuum diffusion welding.

On the drawing (figure 4) shows the case 14 in the cavity which has a stator core 15, the implementation is hydrated in a known manner from one or more packets of electrical steel coil 16. In the cavity of the stator 15 is installed a cylindrical sleeve 17 made of a nonmagnetic insulating material such as fiberglass, with antifriction coating the inner surface of the sleeve, for example, WAP-3. The sleeve 17 is fixed from turning their end sections in end panels 18, 19 of the housing 14 of the machine.

Between the outer surface of the cylindrical bushings 6, 7, band 13 and the inner surface of the insulating non-magnetic sleeve 17 left a small gap, an opening-side end panels 18, 19. Gas-dynamic bearings comprise inner surface of the sleeve 17, the outer surface of the cylindrical bushings 6, 7, band 13 and the gap between them. On the drawing (see figure 3) also shows the jumper 20, forming grooves 8 pear-shaped.

The rotor is collected in the following order (figure 2). On the shaft 1 is put on the cylinder 2. Selection of materials allows the use of vacuum diffusion welding for harvesting rotor, representing a monolithic composition (after the first stage vacuum diffusion welding), including the shaft 1 of non-magnetic steel and the cylinder 2 of the soft-magnetic material with high magnetic permeability.

Next, the workpiece rotor machine in which the perimeter of the cylinder 2 at the same distance from each other wire which indicate the radial slots 3 full length of the cylinder. Of a nonmagnetic material such as stainless steel, is made of two cylindrical sleeves 6 and 7 with grooves of a desired configuration and end caps 10, 12. Into the sleeve 6 install the retaining ring 11. In the grooves 3 of the cylinder 2 is inserted nonmagnetic wedges 5, the shaft 1 is put on the cylindrical sleeve 6, 7 with the necessary orientation and install the cover 10. The resulting Assembly is subjected to vacuum diffusion welding. Then on the outer surface of the cylinder is wound thread 13 of a high-strength non-magnetic material, for example carbon fiber, which is associated hardening synthetic resins. After hardening of the resin the outer surface of the band 13 is subjected to machining, such as grinding, followed by grinding to form a smooth cylindrical surface of the required diameter and roughness.

Then the resulting structure is subjected to thermal expansion, for which it is placed in a heating furnace and heated to the operating temperature of the magnets 4, which provides for sufficient expansion for the free promotion of permanent magnets 4 in the grooves 8 through the cylindrical sleeve 7. The permanent magnet 4 is fixed with a fixing means 9 and install the cover 12.

The claimed device operates as follows. Drive mechanism (not shown) causes the rotation about the rotor. During the rotation of the gas in the gap keen on the outer surface of the rotor and creates a gas-dynamic lift force due to the difference of the gaps in the upper and lower parts of the bearing (due to the eccentricity of the longitudinal axis of the rotor and sleeve)that maintain the rotor in a suspended position relative to the sleeve 17, fixed with respect to the stator 15.

Work electrical machinery not differ from known devices of similar purpose.

1. The rotor electrical machinery, containing a hollow shaft of a nonmagnetic material and put on his hat, made of soft-magnetic material with high magnetic permeability, longitudinal radial slots which are located permanent magnets fixed non-magnetic metal wedges, the outer surface of which corresponds to the curvature of the outer surface of the cylinder, wherein the cylinder is rigidly connected with a hollow shaft and a non-magnetic metal wedges over the entire area of their contact, the ends of the rotor rigidly attached to a cylindrical sleeve made of nonmagnetic metal, coaxially and rigidly fixed to the hollow shaft, in addition, a cylindrical sleeve provided with continuous grooves oriented parallel to the longitudinal axis of the cylinder, with the through grooves are the same in number and mestopolojeniye longitudinal radial slots of the cylinder and exceed their size by an amount enough for free passage through them of permanent magnets, in addition, permanent magnets provided with means locking them in longitudinal radial slots of the cylinder, in addition, the outer surface of the cylinder is equipped with a bandage made by winding at him flexible strands of high-strength non-magnetic material, for example carbon fiber, and the outer surface of the brace attached to a cylindrical shape corresponding to the diameter and surface roughness of the cylindrical sleeves.

2. The rotor according to claim 1, characterized in that thread in the band bonded by impregnation - hardening synthetic resins.

3. The rotor according to claim 1, characterized in that the fixation means of permanent magnets in a longitudinal radial slots of the cylinder is made in the form of parts of a nonmagnetic metal, repeating cross-section of the through-grooves of the cylindrical sleeve, and placed with tightness in through the grooves in contact with the ends of the permanent magnets.

4. The rotor according to claim 1, characterized in that the free end of the at least one cylindrical sleeve screw-in closed or sealed cover.

5. The rotor according to claim 1, characterized in that the fastening rigidly connected details of the rotor used vacuum diffusion welding.



 

Same patents:

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: device intended to retain at least one constant magnet creating magnetic flow on surface of rotor of electrical machine during cooling of the machine, which contains at least one slot sunken from surface and spreading from one end of the above surface, and at least one clamping shaped element inserted at least in one appropriate slot having the projection projecting beyond the surface to come into contact at least with one magnet; at that, at least one slot and at least one clamping shaped element have the shape providing the possibility of retaining at least one clamping shaped element at least in one corresponding slot for retention at least of one magnet brought into contact on surface of the device.

EFFECT: providing reliable clamping and fixation of constant magnets on surface of rotor of electrical machine at simultaneous provision of the device for its cooling.

20 cl, 12 dwg

FIELD: electricity.

SUBSTANCE: invention may be used in wide range of machine shaft rotation frequencies (from several rpm to several tens of thousands rpm) in automatics systems, in autonomous electric equipment systems, in military, space engineering, household equipment, on aviation and motor transport, as traction controlled and uncontrolled electric drives, submersible oil pumps, wind-powered generators, hydraulic generators, multi-phase synchronous electric motors, multiphase high-frequency synchronous electric AC generators and multi-phase generators of frequency converters (including three-phase systems), and also, in rectification of output AC voltage and current of generators with the help of semiconductor rectifying devices and with the possibility to use smoothening filters to reduce pulsations of output parameters, as sources of supply with direct (rectified) current, exciters of synchronous generators of mobile mini-power plants, subexciters of main exciters of synchronous generators at stationary power plants. A stator of the contactless magnetoelectric machine with axial excitation comprises a charged core of an anchor with salient poles pressed in a soft magnetic body, being a magnetic conductor of an inductor, a coil multi-phase winding of the anchor, coils of which are arranged on appropriate salient poles of the anchor, one at each pole. The winding-free rotor of the machine comprises a shaft with a non-magnetic bushing placed on it, thickness of which in radial direction is considerably higher than the value of the working air gap, on which there are odd and even inductor cores with pole ledges arranged in a coaxial manner. Number of inductor cores is at least two, even cores of the inductor are displaced relative to odd cores of the inductor in tangential direction by half of pole division of the inductor core. Between cores of the inductor there are circular layers of segment permanent magnets axially magnetized in one direction and arranged in layers so that a unipolar permanent magnetic flow of the inductor is developed. Number of circular layers of segment permanent magnets is by one less than the number of inductor cores. At the same time certain ratios are met between the number of salient anchor poles, number of phases of the multi-phase coil winding of the anchor, number of salient poles of the anchor in the phase and number of pole ledges of each core in the inductor.

EFFECT: production of highly reliable, manufacturable and highly repairable design of the multiphase contactless magnetoelectric machine with axial excitation with high power parameters and operational characteristics at wide range of shaft rotation frequencies and with various ratio of active length and diameter of the machine stator bore.

18 cl, 4 dwg

Borehole generator // 2426875

FIELD: electricity.

SUBSTANCE: generator includes protective housing, electric connector, at least one attachment assembly, rotor with hydraulic turbine, constant magnets and excitation windings. At that, rotor includes several discs with through radial slots in which constant magnets are installed. Poles of constant magnets are directed parallel to generator axis and alternate. Excitation windings are installed on both sides of each disc. Generator cavity is filled with lubricating fluid. On upper edge of rotor there is filling opening of lubricating fluid to the cavity of generator. Generator includes at least one pressure and temperature expansion compensator interconnected with generator cavity.

EFFECT: simplifying the design, improving reliability and power of generator at decrease of axial dimensions and weight of electric generator.

5 dwg

Borehole generator // 2426874

FIELD: electricity.

SUBSTANCE: borehole generator is equipped with protective housing, electric connector, at least one attachment fitting, rotor with hydraulic turbine, constant magnets, rotor of generator and excitation windings which are fixed inside protective housing. Magnetic coupling containing drive and driven half-couplings and magnetic permeable partition between them is installed between rotors. Discs having radial slots in which constant magnets are installed are fixed on generator rotor. Excitation windings are installed on both sides of discs. Tight magnetic permeable partition containing parts from magnetic permeable material is arranged between driven and drive half-couplings. At that, drive half-coupling is connected to rotor, and driven coupling is connected to generator rotor. Inner cavity of drive half-coupling is filled with lubricating fluid. On upper edge of rotor there is filling opening of lubricating fluid to the cavity of drive half-coupling. Generator includes at least one pressure and temperature expansion compensator interconnected with cavity of drive half-coupling.

EFFECT: simplifying the design, improving reliability and power of generator at decrease of diametrical dimensions and weight of electric generator.

3 dwg

FIELD: electricity.

SUBSTANCE: invention refers to low-speed high-torque electric motors, electric drives and generators, to the design of non-contact electric machines with electromagnetic reduction with combined excitation of inductor and can be used in automation systems as motorised wheels, motorised drums, starter-generators, electric steering wheel boosters, direct drives in domestic equipment, electric drives of high and average power of ships, trolleybuses, trams of the underground, concrete mixers, lifting mechanisms, belt conveyors, liquid transfer pumps, mechanisms with high torques on the shaft and low frequencies of its rotation, as direct drives without using any mechanical reduction gears, as well as wind-driven generators, hydraulic generators, high-frequency electric generators, synchronous generators of frequency converters and as controlled stepped motors. Non-contact reduction machine with salient-pole armature 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 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 of non-contact electric reduction machines with salient-pole armatures with combined excitation and application of electromagnetic reduction in wide ranges at providing high energy parametres and operating characteristics with possibility of smooth and deep control by means of output parametres.

9 cl, 5 dwg, 1 tbl

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: rotor of a synchronous electric machine comprises a core, permanent magnets fixed on the core and forming a magnetic system of the rotor, and also a start-up winding made in the form of a hollow cylinder, which is made of current-conducting material and is pressed onto the magnetic system of the rotor. At the same time according to the invention the current-conducting material, from which the hollow cylinder is made, is magnetic and has specific electric resistance within (0.6-1.1) 10-7 Ohm and relative magnetic permeability within 10-50.

EFFECT: invention provides for required start-up parameters of a synchronous electric machine including the level of start-up torque oscillations during direct start-up of synchronous motors from the industrial grid, increased reliability of the damper winding of synchronous generators, due to making of the specified start-up or damper windings in the form of a hollow cylinder from the special alloy, increased efficiency of operation of these windings with simultaneous provision of high manufacturability of rotors.

14 cl, 4 dwg

FIELD: electrical engineering; engines.

SUBSTANCE: applied engine has metal armature bodies with coils on them and magnets placed in numerous levels. The magnetic conductors with their concentric placement form a rotor, according to this invention. The rotor includes numerous cylindrical magnetic conductors placed in many levels in radial direction, and numerous magnets attached to their respective conductors with alternation of the magnets' polarity in relation to each other in the peripheral direction. The stator has metal armature bodies turned to their respective magnetic conductors and numerous coils turned to magnets. Furthermore, an actuating mechanism for engaging the abovementioned engine is suggested, including the brake disc and the calliper. The brake disc is fixedly connected with the engine's rotor. The calliper is installed on one side of the brake disc to limit the brake disc rotation.

EFFECT: increase in the engine's power and in the power of the actuating mechanism for the said engine, which at the same time improves the mass and dimensions parameters for both devices.

19 cl, 16 dwg

Electrical machine // 2440659

FIELD: electricity.

SUBSTANCE: in a proposed electrical machine, comprising a device for development of a magnetic field, where an inductor is represented by ferromagnetic cores with electric coils, and devices for conversion of one type of energy into another one, according to the invention, the device for development of the magnetic field is made as a separate unit in the form of a flange with concentric flanges on the wall made of non-magnetic and dielectric materials. In through radial slots made on flange collar rims, in a certain sequence, ferromagnetic cores are fixed with electric coils, which form pole pairs of the electrical machine. Stiffness of ferromagnetic cores fixation with electric coils in slots is ensured by a pressing cover, which is also made from non-magnetic and dielectric material. The device to convert one type of energy into another one consists of two rotors. One rotor is installed in the inner part of the device to develop a magnetic field and interacts with a so called main magnetic flux Φm and interacts with a so called magnetic leakage flux Φl.

EFFECT: higher efficiency of electrical machine operation due to using a magnetic leakage flux Φl in electric motors to develop a torque Mt, and in current generators - for production of electric energy.

4 dwg

FIELD: electricity.

SUBSTANCE: in accordance with this invention an improved stator (28) is proposed for rotary electric machines, with single-layer stator windings, comprising multiple previously formed coils (22) with identical angle pitch. The stator (28) comprises the first cylindrical surface, in which there are multiple slots (30) of windings displaced along the circumference, into which arms (24) of the previously formed coils (22) are inserted as arranged along the axis. Each of two arms (24) of the winding in each coil (22) are inserted into an appropriate slot (30) of the winding, besides, two slots (30) of the winding, where a coil (22) is inserted, form a pair of the winding slots. Improvement consists in the fact that slots (30) of the winding in each pair of the winding slots enter the stator (28) mainly in parallel directions. It means that arms (24) of the winding arranged along axis in every previously formed coil (22) may also be mainly parallel and do not require arrangement at the angle to each other. This makes it possible to simplify making the stator (28), since each previously formed coil (22) may be easily and simply inserted into a pair of parallel slots for the winding.

EFFECT: reduced time for winding of a stator in a rotary electric machine with simultaneous reduction of possible damage in the process of winding of previously formed coils.

16 cl, 4 dwg

FIELD: electricity.

SUBSTANCE: suggested alternate current generator consists of stator including two laminated stacks with polyphase winding pressed-in into massive magnet core, stationery field between laminated generator stacks and rotor with shortened poles. At that poles are made as permanent magnets with radial magnetisation and shortening in axial direction; shortening for poles of different polarity is made at opposite sides and insert made of soft magnetic material is added at point of shortening; number of rotor poles differs from number of stator teeth per one or two; stator winding consists of coils and each coil is slipped on two teeth of both laminated stacks located opposite each other.

EFFECT: enhancement of generator performance and possibility to obtain voltage with higher frequency at low rate of generator rotation.

3 dwg

FIELD: electricity.

SUBSTANCE: cooling liquid under pressure generated by external drive of electric pump is supplied to common collector and from there liquid water supplied to all coolers. Cooling liquid heated by heat emitted by electric machine stator goes through drain pipes to drain part of collector; from there heated cooling liquid is supplied to external heat exchanger and after cooling it is supplied again to input part of the collector. Thus stator liquid-cooling system is a closed loop. Efficiency of cooling system operation is increased due to increase area of cooling liquid contact surface with active parts of electric machine stators; the more is the contact surface area the higher is cooling intensity.

EFFECT: improvement of electric machine stator cooling by provision of cooling system configuration that repeats shape of stator magnet system where cooling liquid passes.

2 dwg

FIELD: electricity.

SUBSTANCE: 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.

EFFECT: increasing unit capacity of electrical machine owing to reducing temperatures of active parts of its stator and rotor.

4 cl, 4 dwg

FIELD: electricity.

SUBSTANCE: 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.

EFFECT: increasing unit capacity of electrical machine owing to reducing temperatures of active parts of its stator and rotor.

4 cl, 4 dwg

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 thousand 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 and high-frequency synchronous electric AC generators, 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 non-contact electric machine with axial excitation includes odd and even armature cores with salient poles of armature, which represent laminated packs from insulated electrotechnical steel plates with high magnetic permeability and fixed in soft magnetic housing; the number of armature cores - not less than two, on salient poles of armature there concentrated is coil multi-phase armature winding, each coil of which envelopes in axial direction one of salient poles of armature of each armature core; between armature cores there located are ring-shaped coils of inductor excitation winding, the axes of which coincide in axial direction with machine shaft axis, connected to each other in magnetic opposite ratio, of ring-shaped coils of inductor excitation winding is one less than the number of armature cores. Rotor without winding includes non-magnetic shaft with soft magnetic bushing 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; the number of rotor magnetic conductors is equal to the 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 design appropriate to the material of multi-phase non-contact electric 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.

18 cl, 5 dwg

FIELD: electrical engineering; mechanical design of commutatorless magnetoelectric machines.

SUBSTANCE: rotor magnetic system has more than two magnetically permeable steel laminations with pole horns formed by prismatic tangentially magnetized N-S permanent magnets placed inside laminated stack; inner and outer diameters of laminations are uninterrupted and rectangular prismatic magnets are installed inside them so that distance over outer arc between external planes of two adjacent magnets of unlike-polarity poles is shorter than that over internal arc between same planes; magnets do not contact one another and have at least one projection on inner diameter for coupling with rotor shaft.

EFFECT: enhanced manufacturability.

3 cl, 2 dwg

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