Terminal electrical machine

FIELD: electricity.

SUBSTANCE: method is realised by variation of terminal electric machine stator and rotors design variation, and also by using non-magnet and dielectric materials in bearing structures of the machine, which make it possible to reduce losses from occurrence of vortex currents. Application of up-to-date non-magnet and dielectric materials with sufficient heat resistance and strength exceeding strength of metals, and also with lower volume weight in manufacturing of electric machines will make it possible to wider use terminal electric machines of the proposed design in aircraft building.

EFFECT: improved manufacturability of terminal machines production, higher stiffness of their main parts and increased power indices of a terminal electric machine.

3 dwg

 

The invention relates to electrical engineering and can be used to generate electrical energy and conversion of electrical energy into mechanical energy.

Known construction mechanical electrical machine with a stator and two rotors.

Known mechanical electrical machine (A.S. USSR №462255, publ. 28.02.1975 g)containing espesaly stator recruited from coil groups, the active part of which is made of alternating between the winding conductors and separated by insulation layer sheet of ferromagnetic elements, the frame of the stator, which strengthened the active part of the coil groups and two rotors located on opposite sides of the stator frame and the stator is made of a material with a large electric resistance and has seats for installing the coil groups.

Known mechanical electrical machine (patent RF №2246168, publ. 10.02.2005, including the stator winding, fixed in the housing facing the working surfaces of the two disc-shaped rotors that are located on both sides of the stator, mounted in bearings, the stator is made of two halves, each of which is encapsulated Autonomous zubtsovy layer distributed winding as the winding modules and the yoke wound steel tape installed on different sides of this thesis is as, from both sides of the disk is made centering belts, on which is centered the plate winding modules, and on the two disks of the rotor from the working surfaces of the stator is made by two centering of the belt, between which are mounted permanent magnets, pole pieces which have the form of plates with decreasing toward the edges of the section.

Known mechanical electrical machine (patent RF №2313888, publ. 27.12.2007, containing a stator, comprising a disk mounted in the housing, and the wrapping modules facing working surfaces to the respective disc-shaped rotors with squirrel-cage windings located on both sides of the stator and mounted in bearings in the disk slot stator is made under the wrapping modules, the edge (limb) of two adjacent slits oriented in the same direction of the disk, and the following two slots in the reverse direction, in which the wrapping modules configured in such a way that between the two sets of plates of one winding of the module there is one set of plates of two adjacent winding modules the opposite side of the disk, in addition, on the disk of the stator in the intervals between the slits under the wrapping modules in the radial direction is made narrow slits.

The reason for the small introduction of known end electric cars what is the technological complexity of manufacturing and the lack of rigidity of the main parts of the machines - stator and rotors.

Technical result achieved when using the present invention is to improve the manufacturability, the increase in the rigidity of their main parts, stator and rotor, as well as improving energy performance.

This technical result is achieved by changing the design of the stator and rotor end of the electric machine, and use in load-bearing structures of the machine nonmagnetic and dielectric materials, which allow to reduce losses from the appearance of eddy currents in the structures of the end of the electric machines. The declared end of the electric machine includes a stator and two rotors, according to the invention, the stator housing, which is also the case end of the electric machine, made of non-magnetic, dielectric material in the form of a hollow cylinder having two symmetrical inner bore on the front side, which form a belt, the sides of which serve as the attachment point of the two bearing plates made of non-magnetic, dielectric material, which have a Central hole and are designed to mirror the footprint for mounting coaxially with the shaft of the machine laminated ferromagnetic core coil groups, one of the bearing plates, the perimeter of the Central open the I, for rigidity, has a collar with the screw holes serving for pulling together both bearing plates; to provide additional rigidity to the stator in places free from the coil groups are spacer sleeves with thread and coupling screws; the rotors consist of two bearing plates having a hub to fit on the shaft journal, one of the bearing plates are made of laminated ferromagnetic material, the second is of non-magnetic, dielectric material, in both bearing disks mirrored executed seats to install the machine shaft coaxially laminated ferromagnetic core coil groups carrying a disk made of non-magnetic, dielectric the material around the perimeter of the outer diameter has a clamp with the screw holes serving for pulling together both bearing plates, to provide additional rigidity of the rotor, in places free from the coil groups are spacer sleeves with thread and coupling screws.

Figure 1 shows the cut end of the electric machine, figure 2 shows the end of the electric machine, figure 3 shows the structural elements of the end of the electric machine.

End electric machine includes a side flange with a bearing socket 1, the shaft 2, the ferrite are the second rotor disc 3, non-magnetic dielectric carrier disk rotor collar 4, non-magnetic dielectric disk of the stator with the collar 5, the ferrite laminated cores of rotors with 6 windings 7, the stator housing of nonmagnetic and dielectric material 8, which serves at the same time the body end of the electric machine, ferrite, laminated cores of the stator 10 with the windings 9, nonmagnetic dielectric carrier disk of the stator 11, a side flange with a bearing socket 12.

End of the electric machine can operate in the mode of the electric motor and generator mode current.

In the presented design of the rotors, as closed circuit are used coil groups, i.e., ferrite cores with windings. This allows end electric car is more efficient to operate in generator mode current.

In this case, the front flange with bearing socket takes the form of a front flange of the current generators of the cylindrical electric cars, and on the shaft end of the electric machine is installed collector device, which is switched by the conclusions of the winding coil groups of the two rotors.

The rotor end of the electric machine consists of two bearing plates, laminated ferrite disk hub 3 and non-magnetic, dielectric disk with the hub 4. In both di is under 3, 4, there are seats made mirror, to install the ferrite, laminated cores with 6 windings 7.

Both discs are pinned on the shaft 2 and insure from turning one's key.

In the upper part, both bearing disc tightening the screws through the threaded holes made in the remote collar bearing disk 4.

To ensure the necessary rigidity of the both bearing disk 3, 4 can be pulled together optionally with screws and distance sleeves threaded installed in locations free from the coil groups. The use of non-magnetic, dielectric materials for the manufacture of a bearing disk 4 can reduce losses from the occurrence of eddy currents.

The stator end of the electric machine consists of a body 8 made of non-magnetic dielectric material. The stator housing 8 is also the case end of the electric machine. He is a hollow cylinder having end sides symmetrical internal bore forming a band. The cross-section of the wall of the band is a bracket carrying a non-magnetic, dielectric disks 5, 11.

Both bearing disks are mirrored executed seats for mounting laminated ferrite cores 10 with windings 9.

To ensure the rigidity of the bearing disc 5 has a remote the collar, in which the circumference of the collar are threaded holes. Both bearing disk 5 and 11 with screws are drawn together, forming a rigid box-like structure. To provide additional rigidity, in places free from the coil groups in the space between the supporting disks 5 and 11 are remote plug with screw holes through which both bearing disc tightening the screws. The supporting disks 5 and 11 are made of non-magnetic, dielectric material, thereby reducing losses from eddy currents.

Laminated ferrite cores 10 with windings 9 are electromagnets and set their poles facing the poles of the coil groups of the rotors, which also consist of laminated ferromagnetic cores windings 6 and 7. For cooling the face of the electric machine, in supporting the stator discs and rotor are process vents.

The simple design of the main parts of the end of an electric machine - a stator and a rotor, can improve the manufacturability of the end of the electric machine and to make their standardization.

End of the electric machine on the example of the asynchronous motor, operates as follows.

The stator winding 9 is fed three-phase alternating electric current, which creates a rotating magni is Noah field, which according to the law of electromagnetic induction induced EMF in the closed circuits of the conductors, which in our case are winding reel 7 groups of rotors, and the induced EMF generates its own magnetic field. When the interaction of the magnetic fields of stator and rotor occurs electromagnetic torque, resulting in a rotation of the rotors. When operating in the generator mode current, the coil 9 end of the electric machine is an excitation winding.

The excitation winding of the stator 9 is energized, generates a magnetic field.

The rotor end of the electric machine are driven by a separate source of mechanical energy.

When crossing the windings of the rotor magnetic lines of force of the magnetic field of the stator, they induced electric current, which is removed in the work network using the collector device.

Mechanical electrical machine containing a stator and two rotor, wherein the stator housing, which is also the case end of the electric machine, made of a nonmagnetic dielectric material in the form of a hollow cylinder having two symmetrical inner bore on the front side, which form a belt, the sides of which serve as the attachment point of the two bearing plates made of non-magnetic dielectric Mat is the Rial, which have Central openings and are designed to mirror the footprint for mounting coaxially with the shaft of the machine laminated ferromagnetic core coil groups, one of the bearing plates around the perimeter of the center hole for rigidity has a clamp with the screw holes serving for pulling together both bearing plates to provide additional rigidity to the stator, in places free from the coil groups are spacer sleeves with thread and coupling screws, rotors consist of two bearing plates having a hub to fit on the shaft journal, one of the bearing plates are made of laminated ferromagnetic material, the second is of a nonmagnetic dielectric material, both bearing the mirrored disks made seats for the installation of the machine shaft coaxially laminated ferromagnetic core coil groups carrying a disk made of non-magnetic dielectric material around the perimeter of the outer diameter has a clamp with the screw holes serving for pulling together both bearing plates, to provide additional rigidity rotors in places free from the coil groups are spacer sleeves with thread and coupling screws.



 

Same patents:

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: 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: power industry.

SUBSTANCE: double-rotor tooth wind-driven generator includes stationary stator winding of solenoid type, as well as two rotors from non-magnetic material. Rotors are made in the form of discs and located coaxially. Equal even number of constant magnets is distributed uniformly on each rotor. Stationary stator winding of solenoid type is wound along axis of wind-driven generator and located between two cylindrical cores from ferromagnetic material. Core with larger diameter is fixed with its outer side in the housing. Both rotors are arranged on one shaft. Shaft is connected to wind wheel and has the possibility of being rotated in bearing supports fixed in the housing. Constant magnets are U-shaped, and their poles are located coaxially on each of the rotors and directed unipolar to each other. Each of constant magnets has the possibility of coaxial rotation with edges of cylindrical cores. Edges of cylindrical cores have tooth shape with number of teeth equal to number of constant magnets. Teeth of one edge of cylindrical cores are coaxial to slots of other edge of cylindrical cores. In each slot there located is connection strap from ferromagnetic material, which connects both cores.

EFFECT: increasing EMF induced in stator winding and simplifying the manufacturing procedure of stator winding.

4 dwg

FIELD: engines and pumps.

SUBSTANCE: engine includes stator with the first and the second armatures which form rotating magnetic field, inner rotor with the first and the second constant magnets, and outer rotor (13) located between stator and inner rotor. Outer rotor (13) includes rotor housing (31) that supports the first and the second induction magnetic poles (38L, 38R) made from feebly magnetic material so that they are inserted into rotor housing. Phase of the first induction magnetic pole (38L) coincides with phase of the second induction magnetic pole (38R). The first and the second induction magnetic poles are assembled in rotor housing (31) so that they are inserted into linear slots (31a) formed in rotor housing in (L) axis direction. Since the first and the second induction magnetic poles (38L, 38R) are aligned in (L) axis direction, outer rotor (13) has simple design and improved reliability. Besides, support and assembly of the first and the second induction magnetic poles (38L, 38R) in outer rotor (13) is simplified.

EFFECT: simpler structure of rotor supporting the induction magnetic poles, improving reliability of rotating electric machine.

16 cl, 39 dwg

FIELD: electricity.

SUBSTANCE: in proposed magnetoelectric generator the rotor of which is provided with constant magnets (3) and (4), and stator contains two parallel plates (5) and (6), between which annular windings (7) are arranged, according to this invention the rotor is made of two parallel discs (1) and (2) fixed on shaft, on each of which ring-shaped rows of constant magnets (3) and (4) are arranged on surfaces facing each other and located in each row at equal distance; polarity of constant magnets of each row alternates. At that, poles of constant magnets of one row face opposite poles of constant magnets of other row, and annular windings (7) of stator are made in the form of equal trapezoids the lateral sides (8) and (9) of which are located radially relative to rotor rotation axis, and sections (11) and (12) of annular windings (7) in bases of trapezoids are bent through an arc; annular windings (7) are inserted into each other in pairs. At that, distance ℓ between sections (11) and (12) of annular windings (7) in bases of trapezoids exceeds width b of ring-shaped row of constant magnets.

EFFECT: increasing efficiency coefficient and reducing starting moment of generator, and decreasing noise level during generator operation.

5 dwg

FIELD: electricity.

SUBSTANCE: electric generator is proposed for a wind-driven plant, comprising a stator, a rotor with a base and a cover, magnets and a flat coil. The magnets are installed on the cover and the base along a ring with a certain gap, and there is a flat coil installed between the magnets with a minimum gap, which is closed by circular plates at two sides. The flat coil is made of three windings located in radial gaps of a matrix. The matrix consists of an outer and an inner parts. Circular plates and the matrix are made of a dielectric non-magnetic material, and the base with the rotor cover are made of a magnetically conductive material. The magnets on the cover and the base are arranged as alternating with opposite poles, at the same time the magnets installed on the cover and the base opposite to each other also have the opposite poles.

EFFECT: simplified design of an electric generator for a wind-driven plant with simultaneous increase of its efficiency factor.

7 cl, 9 dwg

Electrical machine // 2400006

FIELD: electricity.

SUBSTANCE: electrical machine comprises stator with winding, inner rotor with output shaft installed in bearings, intermediate rotor covering inner rotor, on inner surface of intermediate rotor there are windings arranged, shaft of intermediate rotor is arranged as hollow, inside there is inner rotor shaft, besides bearings arranged on shafts of inner and intermediate rotors are arranged coaxially to their axis of rotation. On outer surface of intermediate rotor there are groups of permanent magnets arranged with alternating polarity, and generator winding of stator is multi-phased.

EFFECT: increased efficiency of device operation in wide range of inner rotor output shaft rotation speed change due to controlled redistribution of coaxial rotors rotation speeds, production of permanent output power with control of its rotation speed, and expansion of functional capabilities.

2 dwg

FIELD: electricity.

SUBSTANCE: asynchronous motor with hollow short-circuit rotor includes hollow rotor and external stator with core and winding, as well as additional rotor installed on the shaft in the zone restricted with stator with possibility of rotation irrespective of hollow rotor, made from ring-shaped magnet radially magnetised with the number of pairs of poles, which is equal to the number of pairs of poles of stator winding, on which there pressed is thin-wall sleeve from conducting material, and hollow rotor is made in the form of thin-wall shell from conducting material.

EFFECT: increasing power coefficient and efficiency of asynchronous motor with hollow rotor without deterioration of its dynamic characteristics.

3 cl, 2 dwg

Electrical machine // 2396671

FIELD: electricity.

SUBSTANCE: in electrical machine containing the device for creation of magnetic field and device for conversion of one kind of energy to the other, according to the invention, in device for creation of magnetic field (stator) the slots formed with magnetic conductor, which are through in axial direction, are also through in radial direction, and above external part of open slots which are through in radial direction there installed is external rotor enveloping the external part of stator (magnetic field creation device). Thus, electrical machine has inner rotor with which the main magnetic flow interacts, and outer rotor with which leakage flux interacts.

EFFECT: use of leakage flux in electric motors for creation of torque moment Mt, and in current generators for obtaining electric power, and as a result, increasing operating efficiency of electrical machines.

3 dwg

FIELD: electricity.

SUBSTANCE: assembled stator comprises a stator core having the first end, the second end and multiple slots passing from the first end to the second end; multiple current-carrying cords comprising many separate insulated wires. Besides, at least one section of multiple current-carrying cords passes from the first end to the second end of one slot from the specified multitude of slots, at the same time the specified at least one section is twisted inside the specified one slot by the previously determined value to reduce the current circulating along the multitude of separate insulated wires on the specified at least one section to the minimum, and multiple current-carrying cords contain multiple pairs of current-carrying cords connected with a double star, besides, each pair of current-carrying cords corresponds to an AC phase connected to a stator, and has at least two current-carrying cords connected in parallel. Also the method to assemble such stator is proposed.

EFFECT: reduction of current circulating along multiple separate insulated wires on the section of each current-carrying cord arranged in a slot of a stator core to the minimum.

16 cl, 12 dwg

FIELD: electricity.

SUBSTANCE: motor stator includes stator core made of set of laminations each having a number of poles; isolator comprising of lower isolator and upper isolator fixed to stator core, variety of fixtures with attachment hole in each for the purpose of stator fixing and variety of connectors with number of vertical ribs in each to connect isolator to each fixture; at that isolator, fixtures and connectors represent one assembly made by pressure-die casting and stator core is inserted into it; however according to this invention each connector includes the central vertical rib that connects each fixture and isolator on the minimal curve, at that the central vertical rib is located between lengths of two nearby poles.

EFFECT: overall reliability enhancement for stator and electric motor by means of stator fatigue and damage prevention due to gain in strength and rigidity of base section without poles which is the closest to the specified fixture and due to simultaneous reinforcement of the above fixture.

12 cl, 6 dwg

FIELD: electricity.

SUBSTANCE: in the proposed electromagnetic machine there is the second stage of excitation, which makes it possible to avoid generation of parasitizing EMF in windings of motive poles of the main stator when passed by the electromagnetic poles of the inductor. During rotation of the movable intermediate inductor (rotor) from an external motor, EMF will be induced in the active wires of the movable stator resulting in windings of the electromagnetic poles of the movable inductor. It is due to the fact that these wires will periodically cross now outgoing, now converging lines of magnetic field induction, developed by magnetic poles of permanent magnets of a fixed central inductor. Magnetic flows developed by currents in windings of the movable inductor piles increase due to their ferromagnetic cores µ times, which will penetrate active wires of the main fixed stator generator poles windings. As a result of electromagnetic induction EMF are induced, which will cause currents in windings of movable poles of the main fixed stator. The latter are polarised at the same time, their magnetic flows also increase µ times and start interacting positively with electromagnetic poles of the movable inductor. As a result each pole of the movable inductor along with its motion will always be exposed to a pair of positive forces, which will help the rotor to reach the nominal speed.

EFFECT: improved electromechanical characteristics of the electromagnetic machine with simultaneous increase of its efficiency.

2 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: 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: 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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