Electric machine

FIELD: machine building.

SUBSTANCE: electric machine contains casing with laminated rotor core with slots for winding coils installation. In the cylinder cavity of the stator the rotor is installed with possibility of rotation, it includes shaft and inductor with external cylindrical surface containing alternating along the perimeter poles and permanent magnets fixed in slots of the inductor by the non-magnetic wedges. Between the shaft and inductor a bushing is installed, on it inductor is rigidly secured. End faces of the rotor are rigidly secured to the end face covers. The composite permanent magnets of similar height ate rigidly secured in ring clearances. Ring permanent magnets are rigidly secured above each other on walls of second and forth ring collars looking on the rotor axis of rotation. Electric machine casing is provided with shields.

EFFECT: increased service life of the electric machine, significant friction decreasing in bearings at increased and high rotational speed of the inductor.

3 cl, 2 dwg

 

The invention relates to the field of electrical engineering and, in particular, to 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 C. A., Galaev F. F. 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 peripheral speed of the inductor. Because the load bearing characteristics of the sites do not permit high speed rotation of the rotor by increasing its radial dimension.

The closest to the proposed solution is electromachine, comprising a housing, a cavity which is placed laminated stator core with slots, which are placed in the coil winding, and in the cylindrical cavity of the stator rotatably housed a rotor including a shaft and an inductor with an external cylindrical surface containing alternating along the perimeter of the field is a and the permanent magnets, fixed in the grooves of the inductor nonmagnetic wedges, and a bearing unit (see RF patent №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 technical solution is a significant reduction of friction in the bearings of the electrical machinery, increasing its reliability, simplify design, increase the peripheral speed of the inductor without increasing its mass.

The technical result is achieved when the solution of the problem, reflected in the increasing resource electrical machinery, a significant reduction of friction in the bearings at elevated and high peripheral speeds of the inductor.

The problem is solved in that the electromachine, comprising a housing, a cavity which is placed laminated stator core with slots, which are placed in the coil winding, and in the cylindrical cavity of the stator rotatably housed a rotor including a shaft and an inductor with an external cylindrical surface containing alternating around the perimeter of the pole and the permanent magnets are fixed in the grooves of the inductor naman time wedges, and bearing unit, characterized in that between the shaft and the inductor is placed a sleeve, on which is rigidly fixed to the inductor, which is rigidly connected to the longitudinal shaft, preferably, the radial ridges, in addition, the front-end part of the rotor is rigidly bonded to the end caps, the outer diameter of which corresponds to the external diameter of the inductor, the first end cap holds the first and second annular projections, coaxially to the axis of rotation of the rotor, and the second end cap holds the third and fourth annular projections, coaxially to the axis of rotation of the rotor, in the annular gap between the first and second and between the third and fourth annular projections rigidly fixed composite permanent magnets of the same height, each of which contains at least three coaxial annular permanent magnet, the odd of which, counting from the outermost rings, magnetized radially and facing each other of the same poles, and even rings provided with axial magnetization, in addition, on the walls of the second and fourth annular projections directed toward the axis of rotation of the rotor rigidly mounted one above the other, at least three annular permanent magnet with the same diameter of the ring, when this odd rings, starting from the extreme, magnetized along the axis of the rotor and facing each other of the same name p is lucumi, and even rings are made with radial magnetization, in addition, the housing of the electrical machinery is equipped with first and second shields are made with the possibility of hard binding with the respective end edges of the body, in addition, the Central portion of the first shield electrical machinery provided with a cylindrical lug made with the possibility of its placement in the cavity formed by the second annular protrusion of the first end cap, and is provided with a centrally located hole through which rotatably skipped the rotor shaft, on the surface of the cylindrical protrusion facing the second annular protrusion rigidly mounted one above the other, at least three ring-shaped permanent magnet of the same external diameter, with an odd ring, starting from the extreme of the rings, magnetized along the axis of the rotor and facing each other of the same poles, and even rings are made with radial magnetization, and the number, size and direction of the magnetization of these magnetic rings are similar to the number, size and direction of magnetization of permanent magnets fixed to the inner surface of the second annular protrusion of the first end cap of the rotor, in addition, the Central portion of the second shield housing electrical machinery provided with a cylindrical protrusion is made with a chance to view the th of its placement in the cavity, formed the fourth annular protrusion of the second end cap, while on the surface of this cylindrical protrusion facing the fourth annular projection rigidly mounted one above the other, at least three annular permanent magnet of the same external diameter, with an odd ring, starting from the extreme of the rings, magnetized along the axis of the rotor and facing each other of the same poles, and even rings are made with radial magnetization, and the number, size and direction of the magnetization of these magnetic rings are similar to the number, size and direction of magnetization of permanent magnets, fixed on the inner surface of the fourth annular protrusion of the second end cap of the rotor, in addition, the areas of the first and second panels of the body coinciding with the location of annular gaps are formed, respectively, first and second annular projections of the first end cap and the third and fourth annular projections of the second end cap attached composite permanent magnets, each of which contains at least three coaxial annular permanent magnet of the same height, with the odd ring, starting from the extreme of the rings, magnetized radially and facing each other of the same poles, and even rings provided with axial magnetization, precentile, the size and the direction of magnetization of these magnetic rings are similar to the number, size and direction of magnetization of permanent magnets, mounted on the end plates of the rotor. In addition, the walls of the cylindrical protrusions panels reinforced with ribs placed on the surfaces facing the axis of rotation of the rotor. In addition, the front-end part of the cylindrical protrusions fitted resistant safety bearings, made in the form of washers from placitella with a gap relative addressed to them the surface of the rotor, a slightly smaller gap axial magnetic bearing and the radial auxiliary bearings, made in the form of thin-walled bushings from placitella with radial clearance relative to the facing of the rotor surface, a slightly smaller radial gap of the magnetic bearings.

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.

Signs indicating that "...between the shaft and the inductor is placed a sleeve, on which is rigidly fixed to the inductor, which is rigidly connected with the shaft longitudinal, preferably, R is dialname jumpers, in addition, the front-end part of the rotor is rigidly bonded to the end caps, the outer diameter of which corresponds to the external diameter of the inductor", provide the necessary rigidity and structural strength of the rotor of the electric machines with minimum weight and allow you to increase the operating speed of the inductor without substantially increasing its weight.

Signs indicating that "on the first end cap of the rotor is made of first and second annular projections, coaxially to the axis of rotation of the rotor, and the second end cap of the rotor is made the third and fourth annular projections, coaxially to the axis of rotation of the rotor in the annular gap between the first and second and between the third and fourth annular projections rigidly fixed composite permanent magnets of the same height, each of which contains at least three coaxial annular permanent magnet form a heel thrust magnetic bearing on the end surfaces of the inductor. While hard bond permanent magnets with the fifth electrical machinery helps to reduce deformation of the magnets of the magnetic bearing, and the strength of the abutment of the magnetic bearing.

Signs indicating that "odd magnets, counting from the outermost rings, magnetized radially and facing each other of the same poles, and even rings provided with axial nama is nicowanie", form the diagram of the magnetization (the scheme of Albaha) permanent magnets toe, which provides increased magnetic flux, and the direction of its main part in the area of the working gap of the thrust bearing unit for receiving considerable force of repulsion of like poles of permanent magnets. This increases the bearing capacity and stiffness of the thrust magnetic bearing, creates significant repulsive forces.

Signs "...on the walls of the second and fourth annular projections directed toward the axis of rotation of the rotor rigidly mounted one above the other, at least three annular permanent magnet with the same diameter of the ring..." form the axle radial magnetic bearings. While hard bond permanent magnets with magnetic bearing trunnion helps to reduce deformation of the magnets and the strength of the magnetic bearing trunnion.

Signs indicating that "odd rings, starting from the extreme, magnetized along the axis of the rotor and facing each other of the same poles, and even rings are made with radial magnetization", form the scheme of the magnetization (the scheme of Albaha) permanent magnets Zapf, which provides increased magnetic flux, and the direction of its main part in the area of the working gap of the radial magnetic bearing for more significant with the l repulsion of the like poles of permanent magnets. This increases the bearing capacity and stiffness of the radial magnetic bearings, creates significant repulsive forces.

Signs indicating that "the case of the electrical machinery is equipped with first and second shields are made with the possibility of hard binding with the respective end edges of the body, in addition, the Central portion of the first shield electrical machinery provided with a cylindrical lug made with the possibility of its placement in the cavity formed by the second annular protrusion of the first end cap, and is provided with a centrally located hole through which rotatably skipped the rotor shaft", create the possibility of placing a radial magnetic bearing shields electrical machinery and skip the drive shaft of the electric machines.

Signs "...on the surface of this cylindrical protrusion facing the second annular protrusion rigidly mounted one above the other, at least three annular permanent magnet of the same external diameter..." form the liner radial magnetic bearing and provide a rigid bond of permanent magnets with the annular protrusion of the cover of the electrical machinery, the necessary strength of the liner, which reduces deformation of the magnets.

Signs indicating that "odd rings, starting from the extreme of the rings, magnetized along the axis of ro is ora and facing each other with similar poles, and even rings are made with radial magnetization, and the number, size and direction of the magnetization of these magnetic rings are similar to the number, size and direction of magnetization of permanent magnets fixed to the inner surface of the second annular protrusion of the first end cap of the rotor, form a diagram of the magnetization (the scheme of Albaha) permanent magnets, which provides increased magnetic flux, and the direction of its main part in the area of working clearances radial magnetic bearing for receiving considerable force of repulsion of like poles of permanent magnets. This increases the bearing capacity and stiffness of the radial magnetic bearing.

Signs "...the Central portion of the second shield housing electrical machinery provided with a cylindrical lug made with the possibility of its placement in the cavity formed by the fourth annular protrusion of the second end cap, while on the surface of this cylindrical protrusion facing the fourth annular projection rigidly mounted one above the other, at least three annular permanent magnet of the same external diameter..." form the liner radial magnetic bearing. While hard bond permanent magnets with the annular protrusion of the shield electric machines helps to reduce Defoe the information of the magnets and the perception of high radial loads radial magnetic bearing.

Signs indicating that "odd rings, starting from the extreme of the rings, magnetized along the axis of the rotor and facing each other of the same poles, and even rings are made with radial magnetization, and the number, size and direction of the magnetization of these magnetic rings are similar to the number, size and direction of magnetization of permanent magnets fixed to the inner surface of the fourth annular protrusion of the second end cap of the rotor, implementing a scheme of magnetization (the scheme of Albaha) permanent magnets, which provides increased magnetic flux, and the direction of its main part in the area of working clearances radial magnetic bearing for receiving considerable force of repulsion of like poles of permanent magnets. This increases the bearing capacity and stiffness of the radial magnetic bearing.

Signs "...in areas of the first and second panels of the body coinciding with the location of annular gaps are formed, respectively, first and second annular projections of the first end cap and the third and fourth annular projections of the second end cap attached composite permanent magnets, each of which contains at least three coaxial annular permanent magnet of the same height..." form the thrust bearings thrust magnetic needle bearing is nicks. While hard bond permanent magnets with shield electrical machinery helps to reduce deformation of the thrust magnetic bearing and the perception of high axial loads magnetic bearing.

Signs "...odd rings, starting from the extreme of the rings, magnetized radially and facing each other of the same poles, and even rings provided with axial magnetization, and the number, size and direction of the magnetization of these magnetic rings are similar to the number, size and direction of magnetization of permanent magnets, mounted on the end plates of the rotor..." form the scheme of the magnetization (the scheme of Albaha) permanent magnets, which provides increased magnetic flux, and the direction of its main part in the area of working clearances of the thrust magnetic bearing for receiving considerable force of repulsion of like poles of permanent magnets. This increases the bearing capacity and stiffness of the thrust magnetic bearings.

Signs indicating that "wall of cylindrical protrusions panels reinforced with ribs placed on the surfaces facing the axis of rotation of the rotor, to reduce deformation of the panels under the action of repulsive forces of the magnetic bearings.

Signs indicating that "the front-end part of the cylindrical protrusions fitted resistant safety bearing is nikami, made in the form of washers from placitella with a gap relative addressed to them the surface of the rotor, a slightly smaller gap axial magnetic bearing", to prevent damage to the magnets at the excess loads on the thrust magnetic bearings.

Signs indicating that radial auxiliary bearings, made in the form of thin-walled bushings from placitella with radial clearance relative to the facing of the rotor surface, a slightly smaller radial gap magnetic bearings, to prevent damage to the magnets at the excess loads on the radial magnetic bearings.

In Fig.1 shows a longitudinal section of the machine along the axis of rotation, and Fig.2 - cross section.

In the drawings is shown a housing 1, a stator core 2, a split sleeve. 3, the grooves 4, the coil winding 5, the wedges of the groove 6, the first 7 and second 8 shields, shaft 9, the pole 10, the permanent magnets 11, nonmagnetic wedges 12, sleeve 13, the radial crosspieces 14, end caps 15 and 16, the first 17 and second 18, 19 third and fourth annular projections 20, the permanent magnets 21, 22, 23, 24, 25, 26, 27, 28, cylindrical projections 29, 30, the hole 31, the ribs 32, 33, resistant safety bearings 34, 35, the radial auxiliary bearings 36, 37, brace 38.

Electromachine comprises a sealed enclosure 1 in the cavity which establish the laminated stator core 2 from electrical steel. The stator core 2 is supported on the inner ledge of the housing 1, and on the other hand recorded a split sleeve 3 and is provided with open grooves 4, which are placed in the coil winding 5, the fixed wedge 6. Case 1 electrical machinery on both sides provided with a first 7 and second 8 shields made with the possibility of hard binding with the respective end edges of the housing 1.

In the cylindrical cavity of the stator 2 rotatably placed the rotor. The rotor includes a shaft 9 and the inductor with the outer cylindrical surface containing alternating around the perimeter of the pole 10 from a material with high magnetic permeability, for example, from an alloy CP and the permanent magnets 11 of material neodymium-iron-boron with tangential magnetization fixed in the grooves of the inductor nonmagnetic wedges 12 of stainless steel. Between the shaft 9 and the inductor is placed a sleeve 13, which is rigidly fixed to the inductor and which is rigidly connected with the shaft 9 longitudinal, preferably, radial ridges 14.

The front-end part of the rotor is rigidly bonded to the end caps 15 and 16, the external diameter of which corresponds to the outside diameter of the inductor. On the first end cap 15 of the first 17 and second annular projections 18, coaxially to the axis of rotation of the rotor, and the second end cap 16 is made the third 19And fourth annular projections 20, coaxially to the axis of rotation of the rotor. In the annular gap between the first 17 and second 18 and 19 between the third and fourth annular projections 20 is rigidly fixed composite permanent magnets 21 and 22 of the same height, each of which contains at least three coaxial annular permanent magnet, the odd of which, counting from the outermost rings, magnetized radially and facing each other of the same poles, and even rings provided with axial magnetization. On the second walls 18 and fourth 20 of annular protrusions directed toward the axis of rotation of the rotor rigidly mounted one above the other, at least three ring-shaped permanent magnet 23 and 24 with the same diameter of the ring, with the odd ring, starting from the extreme, magnetized along the axis of the rotor and facing each other of the same poles, and even rings are made with radial magnetization.

The Central portion of the first shield 7 electrical machinery provided with a cylindrical lug 29 made with the possibility of its placement in the cavity formed by the second annular ledge 18 of the first end cover 15, and is provided with a centrally located hole 31, through which rotatably skipped the shaft 9 of the rotor. On the surface of the cylindrical protrusion 29 facing the second annular ledge 18 rigidly mounted one above the other, at least three ring pic is Hannah magnet 25 of the same external diameter, when this odd rings, starting from the extreme of the rings, magnetized along the axis of the rotor and facing each other of the same poles, and even rings are made with radial magnetization. The number, size and direction of the magnetization of the magnetic ring 25 is similar to the number, size and direction of the magnetization of the permanent magnet 23 fixed to the inner surface of the second annular protrusion 18 of the first end cap 15 of the rotor. The Central portion of the second shield 8 of the housing 1 of the electrical machinery provided with a cylindrical protrusion 30 is made with the possibility of its placement in the cavity formed by the fourth annular ledge 20 of the second end cap 16. On the surface of the cylindrical protrusion 30 facing the fourth annular projection 20 rigidly mounted one above the other, at least three annular permanent magnet 26 of the same external diameter, with an odd ring, starting from the extreme of the rings, magnetized along the axis of the rotor and facing each other of the same poles, and even rings are made with radial magnetization, and the number, size and direction of the magnetization of the magnetic ring 26 is similar to the number, size and direction of the magnetization of the permanent magnets 24 mounted on the inner surface of the fourth annular ledge 20 of the second end cap 16 of the rotor.

In areas the first is about 7 and a second 8 panels of the housing 1, coinciding with the location of annular gaps are formed, respectively, the first 17 and second 18 of the annular projections of the first end cover 15 and 19 third and fourth annular projections 20 of the second end cap 16 attached composite permanent magnets 27 and 28, each of which contains at least three coaxial annular permanent magnet of the same height, the odd of which, counting from the outermost rings, magnetized radially and facing each other of the same poles, and even rings provided with axial magnetization. The number, size and direction of the magnetization of the magnetic rings 27 and 28 similar to the number, size and direction of the magnetization of the permanent magnets 21 and 22, mounted on the end plates 15 and 16 of the rotor. Wall of the cylindrical projections 29 and 30 shields 7 and 8 are reinforced by the ribs 32 and 33 are placed on the surfaces facing the axis of rotation of the rotor. In addition, the front-end part of the cylindrical projections 29 and 30 shields 7 and 8 have a stubborn insurance bearings 34, 35, made in the form of washers from placitella with a gap relative addressed to them the surface of the rotor, a slightly smaller gap axial magnetic bearing and the radial auxiliary bearings 36, 37, made in the form of thin-walled bushings from placitella with radial clearance relative to facing the Oh to the surface of the rotor, several smaller radial gap of the magnetic bearings. The outer cylindrical surface of the rotor is made brace 38, for example, by winding carbon fiber impregnated with a hardening synthetic resins.

Machine made and collected in the following order.

Using turning and welding manufactured housing 1 with the inner ring, the shields 7 and 8 with the ribs 32, 33, the sleeve 13 of the rotor, lids 15, 16 and the shaft 9.. Milled pole 10.

The Assembly of the rotor of the machine. The sleeve 13 and the shaft 9 welded with longitudinal radial crosspieces 14. By welding the sleeve 13 install the cover 15. Next weld the pole 10 and the wedges 11, using technological conductors. In the grooves 4 of the rotor between the poles of the 10 pre-set tangentially magnetized permanent magnets 11 with respect to the orientation of their polarity. The cover 16 of the rotor rigidly fastened to the sleeve 13 in the center of the rotor, for example, by resistance welding (avoiding demagnetization of the magnets). On the outer cylindrical surface of the rotor is wound bandage 38 of carbon fiber and impregnating his hardening synthetic resins. On the inner cylindrical surface of the end cap 15 and 16 mounted on the adhesive pre-magnetized in the radial and axial directions of the ring magnets 23 and 24 of the radial magnetic bearings in strict soo who, according to their location (see Fig.1). In a small annular cavity covers 15 and 16 of the rotor mounted on the adhesive pre-magnetized in the radial and axial directions of the ring magnets 21 and 22 of the axial magnetic bearing in strict accordance with their location in Fig.1

Manufacture and Assembly of the stator of the machine. From the stamped electrical steel sheets collect the core 2 of the stator (including extreme pressure leaves) and fasten it by welding the grooves on the outer cylindrical surface. In isolated slots 4 of the stator stack winding 5, set the wedges 6 and subjected to impregnation and drying.

The Assembly of panels. On the inner cylindrical surface of smaller diameter large ring cavities shields 7 and 8 mounted on the adhesive pre-magnetized in the radial and axial directions of the ring magnets 25 and 26 of the radial magnetic bearings in strict accordance with their location in Fig.1. End inner surface of the small circular cavities shields 7 and 8 mounted on the adhesive pre-magnetized in the radial and axial directions of the ring magnets 27 and 28 of the axial magnetic bearing in strict accordance with their location in Fig.1. On the inner cylindrical surface of larger diameter large ring cavities shields 7 and 8 mounted on the adhesive cylindrical radial with rahoveci bearings 36 and 37 of placitella. Similarly mounted on the adhesive ring washer from placitella in the grooves of the inner end surfaces of the panels 7 and 8. They are resistant safety bearings 34 and 35.

Assembly of the machine. Wound stator is inserted into the housing 1 and fixed split sleeve 3. Mounted on the housing 1 and fixed to the shield 7. Then install the shield 8 and fasten it to the body 1, for example by screws. With proper Assembly of the generator rotor can rotate freely in the radial and axial magnetic bearings without touching the stator and panels 7, 8. If during operation of the emergency will arise dynamic loads that exceed the repulsive forces between the radial or axial magnetic bearing rotor can rely on radial 36 and 37 or resistant 34 and 35 auxiliary bearings.

The machine can operate as a low-speed generator or motor.

The generator works as follows. When the rotation shaft 9 of the driving motor rotates, and the inductor. His alternating magnetic field induces an EMF in the stator winding. When connecting the load to the generator terminals the electric current is the mechanical energy of the drive motor is transformed into electrical power delivered to the consumer. The values of the voltage and frequency of the generated AC depend on the rotation frequency and the number of rotor poles, and the magnitude and x the nature of the load resistance.

The machine works as a motor, when the stator winding to fail AC, multi-phase (e.g. three-phase) voltage from an external source of electricity. The launch of this engine can produce frequency or asynchronous way. In the latter case the role of the starting winding will be performed by the system of electrically conductive poles 10, a nonmagnetic wedges 12 and end caps 15 and 16. After you start speed will be determined by the frequency of the supply voltage and number of poles of the inductor.

1. Electromachine, comprising a housing, a cavity which is placed laminated stator core with slots, which are placed in the coil winding, and in the cylindrical cavity of the stator rotatably housed a rotor including a shaft and an inductor with an external cylindrical surface containing alternating around the perimeter of the pole and the permanent magnets are fixed in the grooves of the inductor nonmagnetic wedges, and a bearing unit, characterized in that between the shaft and the inductor is placed a sleeve, on which is rigidly fixed to the inductor, which is rigidly connected to the longitudinal shaft, preferably, the radial ridges, in addition, the front-end part of the rotor is rigidly bonded to the end caps, the outer diameter of which corresponds to the external diameter of the inductor, the first end of the first cover is made of first and second annular projections, coaxially to the axis of rotation of the rotor, and the second end cap holds the third and fourth annular projections, coaxially to the axis of rotation of the rotor in the annular gap between the first and second and between the third and fourth annular projections rigidly fixed composite permanent magnets of the same height, each of which contains at least three coaxial annular permanent magnet, the odd of which, counting from the outermost rings, magnetized radially and facing each other of the same poles, and even rings provided with axial magnetization, in addition, on the walls of the second and fourth annular projections, facing the axis of rotation of the rotor rigidly mounted one above the other, at least three annular permanent magnet with the same diameter of the ring, with the odd ring, starting from the extreme, magnetized along the axis of the rotor and facing each other of the same poles, and even rings are made with radial magnetization, in addition, the housing of the electrical machinery is equipped with first and second shields are made with the possibility of hard binding with the respective end edges of the body, in addition, the Central portion of the first shield electrical machinery provided with a cylindrical lug made with the possibility of its placement in the cavity, formed by the second annular protrusion of the first end to the ISCI, and provided with a centrally located hole through which rotatably skipped the rotor shaft, on the surface of the cylindrical protrusion facing the second annular protrusion rigidly mounted one above the other, at least three annular permanent magnet of the same external diameter, with an odd ring, starting from the extreme of the rings, magnetized along the axis of the rotor and facing each other of the same poles, and even rings are made with radial magnetization, and the number, size and direction of the magnetization of these magnetic rings are similar to the number, size and direction of magnetization of permanent magnets, fixed on the inner surface of the second annular protrusion of the first end cap of the rotor, in addition, the Central portion of the second shield housing electrical machinery provided with a cylindrical lug made with the possibility of its placement in the cavity formed by the fourth annular protrusion of the second end cap, while on the surface of this cylindrical protrusion facing the fourth annular projection rigidly mounted one above the other, at least three annular permanent magnet of the same external diameter, with an odd ring, starting from the extreme of the rings, magnetized along the axis of the rotor and facing each other, the same poles of the, and even rings are made with radial magnetization, and the number, size and direction of the magnetization of these magnetic rings are similar to the number, size and direction of magnetization of permanent magnets fixed to the inner surface of the fourth annular protrusion of the second end cap of the rotor, in addition, the areas of the first and second panels of the body coinciding with the location of annular gaps are formed, respectively, first and second annular projections of the first end cap and the third and fourth annular projections of the second end cap attached composite permanent magnets, each of which contains at least three coaxial annular permanent magnet of the same height, moreover, the odd-numbered rings, starting from the extreme of the rings, magnetized radially and facing each other of the same poles, and even rings provided with axial magnetization, and the number, size and direction of the magnetization of these magnetic rings are similar to the number, size and direction of magnetization of permanent magnets, mounted on the end plates of the rotor.

2. Electromachine under item 1, characterized in that the wall of the cylindrical protrusions panels reinforced with ribs placed on the surfaces facing the axis of rotation of the rotor.

3. Electromachine under item 1 that distinguishes the I, that end part of the cylindrical protrusions fitted resistant safety bearings, made in the form of washers from placitella with a gap relative addressed to them the surface of the rotor, a slightly smaller gap axial magnetic bearing and the radial auxiliary bearings, made in the form of thin-walled bushings from placitella with radial clearance relative to the facing of the rotor surface, a slightly smaller radial gap of the magnetic bearings.



 

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Electric machine // 2523029

FIELD: electricity.

SUBSTANCE: electric machine includes case with end screens, housing a laminated stator core with slots where winding coils are located and fixated by wedges, with rotor positioned inside stator cavity and including inducer actuating poles, permanent magnets, no-magnetic wedges and shaft, so that rotor length exceeds inducer length. Rotor end sections are made in the form of cylindrical bushings out of non-magnetic material, flush-mounted on external surface of inducer, rotor bearing unit allows for static gas and dynamic gas support, and for that purpose external rotor features cylindrical surface and is positioned inside cylindrical cavity of the bushing fixated in the stator cavity with gas supply for stator surface cooling, while case cavity has cooling gas supply and drain, and for that purpose internal surface of the case features longitudinal ducts joining radial ventilation ducts made between stator core stacks. According to invention, stator can be vented separately by at least two pipes in the case for cooling gas supply/drain to/from the case volume occupied by the stator, the bushing has longitudinal lugs matching stator core slots in number, positions and cross-section and fit into the slots, slot vent gap is left between lug surface and slot wedge, lengthwise holes are made in longitudinal lugs of the bushing and connect to radial feed orifices opened into internal cavity of the bushing, cylindrical bushings out of isolating material are installed in the case cavity coaxially to stator core cavity and attached by their ends to the ends of outmost stator core stacks, external surface on the ends facing end screens feature o-ring pairs, and end screen junction with the case is sealed. Cylindrical bushings serve as external cartridges of radial gas-dynamic leaf bearings, and rotor end sections serve as trunnions of the bearings, in addition the electric machine features at least one axial gas-dynamic leaf bearing, and orifices are made in end screens, with orifice inlets connected to lubricating gas source and outputs joining annular slot between o-ring pairs, which in its turn joins longitudinal through holes of the cylindrical bushing. Besides, a screen features pipe connected to separate source of cooling gas and joining permanent magnet cooling ducts formed by slot bottom section and permanent magnet surface facing them, via end sections of inducer, and at the opposite case end the ducts are connected to process gap of axial gas-dynamic leaf bearing which in its turn is connected to gas collector.

EFFECT: efficient cooling of stator winding and core, reduced weight and dimensions, improved service life of electric machines, minimum rotor bend, efficient cooling of permanent magnets, extended rotor stability range due to damping by radial gas-dynamic leaf bearings, prevention of rotor jamming at high circular velocities in vicinity of gas-dynamic leaf bearings.

4 cl, 3 dwg

FIELD: electricity.

SUBSTANCE: invention is related to the area of electric engineering and namely to electric machines with permanent-magnet excitation, and it may be used in electric machine engineering. At that the invention ensures improved rotation uniformity, enhanced energy indicators, reduction of noise and vibration level for the magnetoelectric machine. In the suggested magnetoelectric machine including armature with winding laid in z slots and non-salient pole rotor with permanent magnets the armature slots are bevelled at the angle α corresponding to an integer number of tooth harmonic periods.

EFFECT: decreasing reactive moment pulsation for the magnetoelectric machine.

Borehole motor // 2516472

FIELD: engines and pumps.

SUBSTANCE: invention relates to electrical engineering and machine building, particularly, to borehole motors to lift bed fluid. Proposed borehole motor comprises stator with toothed magnetic core accommodating the rotor. Stator teeth internal surface has grooves regularly arranged in circle in axial direction, the number making three, or being multiple of three.

EFFECT: lower reactionary torque, hence, vibration, better starting properties.

2 cl, 8 dwg, 2 tbl

FIELD: electricity.

SUBSTANCE: present invention relates to electrical engineering, particularly electrical machines, and peculiarities of making permanent-magnet synchronous motors for a drainage pump. The disclosed synchronous motor comprises a permanent-magnet rotor for rotating the a rotor wheel, a pump housing on which the permanent-magnet rotor rests, a stator core and a stator coil. According to the invention, the stator coil has a winding made of aluminium enamelled wire and is provided with a part for connection by welding the lead wire of said winding with a contact for connecting with the lead wire; the winding is hermetically insulated in a protective housing; the outer surface of the part for connection by welding of the lead wire of the winding made of aluminium enamelled wire is tin-plated by soldering or tin electroplating, wherein the part for connection by welding of the lead wire, tin-plated by soldering or tin electroplating, is welded to the contact for connection with the lead wire; the outer surface of the winding made of aluminium enamelled wire is first coated with insulating paper tape and then hermetically insulated by said protective housing.

EFFECT: enabling prolonged operation of motors in an air medium containing oxygen without oxidation of the aluminium lead wire while simplifying the process of welding said lead wire and simplifying the process of welding to a contact terminal; protecting aluminium enamelled wire from damage under the action of high temperature during hermetic insulation of the winding in the protective housing, formed by filling with plastic or epoxy resin.

8 cl, 4 dwg

FIELD: electricity.

SUBSTANCE: stator has a variety of segments located close to each other in the circumferential direction. According to the invention the above segments have teeth and slots passing in the longitudinal direction of the stator, at that the neighbouring segments touch each other at the segment boundary and teeth of the neighbouring segments are located so that at the segment boundary a tooth of one segment touches the tooth of the neighbouring segment, herewith the total width of the teeth touching each other at the respective boundary is bigger than the total width of the majority of teeth which are not placed at the segment boundaries or all teeth which are not placed at the segment boundaries directly, at that the minority of teeth not placed directly at the boundary of the specified segments has the same width, which is bigger than the total width of the majority of teeth which are not located directly at the segment border.

EFFECT: potential reducing of clamping moment or pendulous breaking in the rotating electric machine excited by permanent magnets.

5 cl, 3 dwg

FIELD: machine building.

SUBSTANCE: electric machine rotor comprises several segments. The segments include permanent magnets. A partition plate is set between at least two segments. The partition plate is provided with radial partitions and serves as a pressing plate and the partitions serve as a fan and spacers between the segments.

EFFECT: providing for better cooling of a rotor with keeping its simple design.

5 cl, 3 dwg

FIELD: electricity.

SUBSTANCE: invention refers to the sphere of electric engineering and may be used to make a generator stator. The through pin (4) for magnetic stator core (1) of the generator is inserted into an opening (6) in plates (3) of the stator core used for tightening of the core components. The through pin (4) consists of at least two longitudinal members (9, 10) interconnected by at least one connecting element (11). Besides, the assembly method is described for the through pin (4) intended for plates (3) of the generator stator core.

EFFECT: reducing labour intensity of stator manufacture due to potential replacement of through pins located below the foundation bed level, and this replacement does not require special tools or lifting of the frame thus making such replacement easy and cost-effective.

12 cl, 7 dwg

FIELD: electricity.

SUBSTANCE: invention pertains to the field of electric engineering, and namely to salient-pole asynchronous motors, and may be used in electric drive used for different engineering and household applications. The asynchronous electric motor comprises the stator core including polar tips and yoke assembled of electric steel sheets, a cage rotor mounted in the stator bore, the stator winding consisting of coils installed at the poles; the body is made of non-magnet material with the rigidly fixed stator core consisting of one pair of poles and yoke where resonant winding is mounted with a tuning capacitor, at that the polar tips and yoke are made as one piece.

EFFECT: improvement of the motor efficiency factor and significant reduction of consumed power.

2 dwg

FIELD: electricity.

SUBSTANCE: invention relates to a rotating electrical machine, namely to an asynchronous machine of double-way feed, which is intended for operation in the power range of 20 MVA to 500 MVA and higher. The electrical machine can be rotated about an axis of a rotor concentrically enveloped by a stator; the rotor has rotor housing (14) made of metal sheets that are located layer-by-layer and pressed to each other in axial direction into a package by means of clamping plate (19); the above rotor housing is divided in radial direction into internal mechanical zone (14b) and external electrical zone (14a), and rotor winding (18) is installed in electrical zone (14a) of the above rotor housing. Axial stress of the rotor housing of such a machine, which is made of metal sheets, is optimised by the fact that clamping plate (19) in accordance with radial separation of rotor housing (14) made of metal sheets is divided radially into a separate internal clamping plate and a separate external clamping plate.

EFFECT: improvement of the design.

9 cl, 3 dwg

FIELD: electricity.

SUBSTANCE: invention relates to electric engineering, in particular to electric machines with salient poles, including generators and motors. The suggested electric machine with salient poles includes rotating field assembly having curved outside diameter and including one and more rotor poles, windings and rods supporting coil, and winding section projecting beyond the rotor poles, and at least one cap of end face turn connected with rotating field assembly and surrounding coil supporting rods and windings section projecting beyond the rotor poles such that to reduce ventilation losses. At that this cap of the end face turn is made with the outside diameter mainly equal or similar to outside diameter of the specified rotating field assembly, and the rotating field assembly includes the open air cavity between the rotor poles and winding supports.

EFFECT: efficiency increasing of the electric machines with salient poles by means of the ventilation losses reduction.

10 cl, 8 dwg

FIELD: electricity.

SUBSTANCE: invention relates to electrical engineering and can be used in a rotating electrical machine, and namely an asynchronous electrical machine of double-way feed in the power range of 20 MV·A to 500 MV·A. The asynchronous electrical machine of double-way feed includes a rotor rotated about the axis and concentrically enveloped by a stator; the stator includes rotor pack (14) assembled of metal sheets divided into layers and pressed in axial direction for attachment; the above rotor pack is divided in radial direction into internal mechanical zone (14b) and external electrical zone (14a), and in which rotor winding (18) is located in electrical zone (14a). Axial clamping of the pack of rotor sheets of such a machine is optimised by the fact that rotor sheet pack (14) in mechanical zone (14b) is pressed by means of shear bolts (22) going in axial direction through rotor sheet pack (14) and in electrical zone (14a) - by means of other bolts (21).

EFFECT: providing protection of insulation against damages.

13 cl, 10 dwg

FIELD: electricity.

SUBSTANCE: invention pertains to the field of electric engineering, in particular to eclectic motors with permanent magnets used, for example, for submerged electric drive without formation fluid lifting. The motor rotor comprises a key-slotted shaft, the core pack made of electric steel plates with alternating poles, and each of them is formed by two V-mounted prismatic permanent magnets with tangential magnetism faced to the pole by its one polarity. The magnets are placed in slots of the pack plates and do not touch each other. The number of magnets is twice bigger than the number of poles. At inner surface of poles of both polarities there are slots along the pole axis.

EFFECT: improvement of the motor output performance due to scattering of magnetic flow at maintained rotor strength.

5 cl, 5 dwg

Stator // 2537791

FIELD: electricity.

SUBSTANCE: invention relates to electrical engineering and wind power, namely to wind power generators with vertical axis of rotation. Stator contains excitation sources, magnetic cores, work coil and bases with fasteners. The magnetic cores are made in form of top and bottom groups. Each group includes angle-bar which horizontal flange looks on the end gap of the rotor element, and vertical flange looks on first end of coil with permanent magnets. The second end of the coil with permanent magnets is connected with common vertical magnetic core.

EFFECT: efficiency improvement due to that not only radial by end gaps are also used.

1 dwg

FIELD: electricity.

SUBSTANCE: invention relates to electrical engineering and wind energetics. Rotor of the segmental electric generator includes shaft, hub, rim and magnetic cores in form of two angle connections of straps, one is inside the other one. The straps have fixtures for securing on the rim. Technical result is improvement of the generator efficiency upon minimisation of its price as the rotor is magnetically interacts with the stator via two air gaps: outside and inside, thus reducing magnetic dispersion. Additional electromotive force increasing is due to additional rotor elements only, at that the magnetic field source is the same.

EFFECT: use of strap elements increases produceability.

1 dwg

Generator stator // 2537698

FIELD: electricity.

SUBSTANCE: invention relates to electrical engineering and wind power, namely to wind power generators with vertical axis of rotation. In the suggested generator stator containing the excitation sources, magnetic cores, work coil and bases with fasteners; according to the invention the magnetic cores are made in form of top and bottom groups, each group includes three angle-bars, their flanges are connected with cores in series via the coils, at that the first angle-bar horizontal flange looks on end of the rotor element, the second angle-bar is installed in zone of the external angle of the rotor element, and third angle-bar is installed with vertical flange in zone of radial gap.

EFFECT: decreasing of the magnetic resistance and assurance of not only radial but end gap also, resulting in length of the used gap and thus increasing the generator efficiency.

1 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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