Synchronous machine

FIELD: electrical engineering.

SUBSTANCE: rotor consists of the main casing (20) and a range of support casings (30a, 30b), which are fixed on the main casing (20) and supporting permanent magnets (40). The two first support casings (30a) located at distance from each other form entrance area for the second support casing (30b) providing possibility of rigid mounting of the first support casing (30a) to the second support casing (30b).

EFFECT: simplified assembly.

36 cl, 6 dwg

 

The present invention relates to rotors of electric machines such as a generator of electric current or an electric motor, comprising a main body and a variety of support housings, which are mounted on the surface of the main body, and the support of permanent magnets.

The design of these rotors is known for a long time. For a long time had problems with the mounting of permanent magnets, which, as a rule, are connected with the supporting blocks on the main body of the rotor. During Assembly it is necessary to take special measures to ensure the safety of personnel, in particular, due to the presence of significant magnetic fields created by permanent magnets, it is necessary to ensure that the workshops were used only non-magnetic materials, and it was used only non-magnetic tools. In addition, in order to avoid any contamination that may adversely affect the operation of collected electrical machines, you must install only in clean rooms.

When assembling the permanent magnets on the outer circumference of the main body of the rotor have the following problem: the magnets that are placed on adjacent support buildings, create large forces of attraction and repulsion to each other, thus significant to epini complicating Assembly. During operation of the machine of centrifugal force, which together with the magnetic forces act on the bearing housings, which leads to the necessity of creating a highly secure and reliable connection between the permanent magnets and/or the bearing housings and the main body of the rotor.

Typically, the connection between the main and the supporting body of the rotor is carried out by means of a rigid connection "in the castle", where the groove in the form of a "dovetail" get machined in the main body of the rotor, in which you can enter the pin in the form of a "dovetail", formed on the main chassis. For example, such design is known from the patents EP 1439626 A1 and DE 19705432 A1.

In spite of this, this embodiment enables the serial connection of the support buildings and, therefore, permanent magnets are installed on them, by pushing into the groove located on the main body of the rotor, so that they can be in any case loaded. However, the implementation of this connection is a very time consuming task, requiring a high degree of precision to ensure the required level of technological access. Therefore, the production of rotors is a very expensive process.

Therefore, the aim of the presented invention is the creating of the rotor of the electric machine, the Assembly which could be more simple, but still safe.

This objective is achieved in that the rotor should have the characteristics listed in claim 1 of the formula. In dependent clauses are shown preferred embodiments of the invention.

Hereinafter the invention will be described in more detail with reference to the drawings, which represent preferred embodiment of the invention.

Figure 1 shows the rotor in the future according to the invention.

Figure 2 presents a view of an axial projection of the rotor according to a preferred variant embodiment of the invention of figure 1.

Figure 3 presents a view of the axial projections during Assembly of the rotor of figure 1.

Figure 4 presents the radial projection of the rotor during a further stage of Assembly.

Figure 5 presents a view of an axial projection of the rotor according to alternative implementation, presented in figure 2.

Figure 6 presents a view of an axial projection of the rotor according to a further alternative implementation, shown in figure 2.

Unlike milling of a groove in the main body of the rotor 10, the basic idea of the invention consists in the formation of bearing housings 30A, 30b of permanent magnets 40 so that the flanges which are opposed outer surfaces to each other is, the first two bearing housings 30A, located at a distance from each other, formed the inlet section, in which you can push the second base body 30b, having a design that provides docking with its flanges, resulting in a radial direction between the first (30A) and second (30b) of the reference blocks is provided a rigid connection.

The advantage of joining the main body 20 of the rotor 10 of the first two bearing housings 30A, which was initially located at some distance from each other, is that in the case of a larger working distances of the forces of attraction and repulsion occurring between the permanent magnets 40 is minimized, therefore, to work with the support housings 30A becomes easier. Along with this increases the safety.

Figure 1 shows the rotor of the most preferred design according to the invention. The rotor 10 has a main body 20, which is fixed to the bearing housings 30A, 30b, which support the permanent magnets 40. In accordance with Figure 1, the first support section 30A are arranged along the circumference of the main body 20 of the rotor 10, alternating with the second reference blocks 30b.

Inlet section formed by the first support housings 30A, preferably has a constructive and the execution of dovetail", as can be seen from Figure 2, the second base body 30b has the shape of a "dovetail". As an alternative or Supplement the first 30A and second 30b bearing housings can be thorny connection, as shown in Figure 5 and 6. When this finger connection can also be designed as a connection type "thorn-groove"; element 70 is preferably inserted into the grooves (almost) identical to the bearing housings 30A, 30b. Most preferably, if the element 70 is rigidly connected to the first 30A or the second base body 30b.

Preferably, the first and second bearing housings 30A, 30b were formed in a similar area of overlap, and also to the first and second bearing housings 30A, 30b in the most preferred embodiment was identical in design, with permanent magnets 40 are fixed on the first and second housings 30A, 30b on the front sides.

To this end, in the cross section of the first support section 30A may also have sectoriales embodiment; however, the second base body 30b may have a design which provides a coupling with them.

The second support section 30b pushed into the input areas formed by the first support housings 30A so that the second support section 30b is securely held in the input part is ke and thus, were protected inlet pipe from the forces of attraction of the first support housings 30A.

After the second supporting section 30b push between the first support housings 30A, which are connected with the main body 20 of the rotor 10 in the axial direction and fixed rigid connection, eliminating the turning radius, additionally fixed on the main body 20.

Assembly having features of the invention the rotor 10, such as a synchronous generator wind turbine can be realized, as shown in figure 3 and 4.

Initially, when the tool 100 at least two of the first anchor body 30A are located next to the main body 20 of the rotor 10 and connected with him on a distance of each other so that the second base body 30b can be placed between the first support housings 30A. By means of flanges directed toward each other, the first support section 30A is formed in the input section to the second support housings 30b.

Then the second base body 30b is pushed into the input area formed by the first support housings 30A, in this embodiment the flanges of the second anchor body 30b provides the coupling flange of the first support housings 30A, thus, radial rigid connection lock is formed between the first and second support blocks 30A, 30b which prevent radial separation of the second anchor body 30b.

The second support section 30b is preferably directly attached to the main body 20, for example, by screws.

When the bearing housings 30A, 30b are fastened with the main body 20 by means of screw connections 50, then the Assembly exists, in particular, the ability to delay the first reference section 30A does not, for example those that have pins with threads (not shown)provided on the support body 30A, the main body 20 to retain the initial gap, and hence the manufacturing tolerances as high as possible in the production of bearing housings 30A, 30b. Only after moving the second support housings 30b in the input area formed by the first support housings 30A, the first and second bearing housings 30A, 30b finally fixed screw connection 50, without compromising safety.

Before connecting the first and second bearing housings 30A, 30b to the main body 20 of the rotor 10, it is necessary to re-perform all steps listed above.

Alternatively, all of the first support section 30A, required for the rotor 10 can be attached to the main body of the rotor 10, and then the second supporting section 30b pushed between them and fixed.

Also for the first and second bearing housings 30A, 30b can preferably p is educatrice fasteners, variously located and designed in the form (threaded) holes, so that the first support section 30A different from the second reference buildings 30b different arrangement of holes". Then these holes (not shown) can be inserted fasteners 50. Also, this design increases safety by optimizing the execution order of operations.

Dense tightening the bearing housings 30A, 30b with the main body 20 of the rotor 10 to create a node with tight junctions has the additional advantage along with the above aspects of the workflow, which consists in minimizing the air gap.

Most preferably, having features of the invention a method implemented so that at least one temporary element 60 (the so-called "blank"; see figure 3) was attached on the surface of the main body 20 of the rotor 10, which saves space for a second anchor body 30b and is removed after mounting the first support housings 30A and before the introduction of at least one of the second main body 30b. This ensures that the first support section 30A are mounted at a distance from each other that provides the pushing of the second anchor body 30b between the first support housings 30A. To this end, the temporary element 60 and eat approximately the same size, as the size of the second anchor body 30b. However, given the technological tolerance such variant is possible also, when the temporary element is the design of a slightly larger size than the second base body 30b.

1. The rotor (10) of an electric machine, comprising a main body (20) and multiple reference blocks (30a, 30b), attached to the surface of the main body (20)and the support of permanent magnets (40), characterized in that the two first supporting body (30a)located at a distance from each other, form the input section to the second anchor body (30b)providing a rigid attaching the first anchor body (30a) to the second anchor body (30b).

2. The rotor (10) according to claim 1, characterized in that the inlet pipe is formed by the first support housings (30a), made in the form of a dovetail for placing the second anchor body (30b), which in cross section has the shape of a dovetail.

3. The rotor (10) according to claim 1 or 2, characterized in that the first and second anchor body (30a, 30b) form a finger connection.

4. The rotor (10) according to claim 1 or 2, characterized in that the area occupied by the first and second support blocks (30a, 30b), are identical.

5. The rotor (10) according to claim 3, characterized in that the area occupied by the first and second support blocks (30a, 30b), are identical.

6. The rotor (10) for any and the to claims 1, 2, 5, characterized in that the first and second anchor body (30a, 30b) are of identical design, with permanent magnets (40) are mounted on opposite sides of the first and second reference blocks (30a, 30b).

7. The rotor (10) according to claim 3, characterized in that the first and second anchor body (30a, 30b) are of identical design, with permanent magnets (40) are mounted on opposite sides of the first and second reference blocks (30a, 30b).

8. The rotor (10) according to claim 4, characterized in that the first and second anchor body (30a, 30b) are of identical design, with permanent magnets (40) are mounted on opposite sides of the first and second reference blocks (30a, 30b).

9. The rotor (10) according to any one of claims 1, 2, 5, 7, 8, characterized in that the second supporting body (30b) is fixed on the main body (20) by means of fixing elements (50).

10. The rotor (10) according to claim 3, characterized in that the second supporting body (30b) is fixed on the main body (20) by means of fixing elements (50).

11. The rotor (10) according to claim 4, characterized in that the second supporting body (30b) is fixed on the main body (20) by means of fixing elements (50).

12. The rotor (10) according to claim 6, characterized in that the second supporting body (30b) is fixed on the main body (20) by means of fixing elements (50).

13. The rotor (10) according to any one of claims 1, 2, 5, 7, 8, 10-12, Otley is audica fact, that the supporting body (30a, 30b) arranged in the axial direction parallel to the axis of the main body (20).

14. The rotor (10) according to claim 3, characterized in that the supporting body (30a, 30b) arranged in the axial direction parallel to the axis of the main body (20).

15. The rotor (10) according to claim 4, characterized in that the supporting body (30a, 30b) arranged in the axial direction parallel to the axis of the main body (20).

16. The rotor (10) according to claim 6, characterized in that the supporting body (30a, 30b) arranged in the axial direction parallel to the axis of the main body (20).

17. The rotor (10) according to claim 9, characterized in that the supporting body (30a, 30b) arranged in the axial direction parallel to the axis of the main body (20).

18. The rotor (20) according to any one of claims 1, 2, 5, 7, 8, 10-12, 14-17, characterized in that the first supporting body (30a) have sectoriales cross section.

19. The rotor (20) according to claim 3, characterized in that the first supporting body (30a) have sectoriales cross section.

20. The rotor (20) according to claim 4, characterized in that the first supporting body (30a) have sectoriales cross section.

21. The rotor (20) according to claim 6, characterized in that the first supporting body (30a) have sectoriales cross section.

22. The rotor (20) according to claim 9, characterized in that the first supporting body (30a) have sectoriales cross section.

23. The rotor (20) according to item 13, wherein the first reference to the of Cusa (30a) have sectoriales cross section.

24. The rotor (20) according to any one of claims 1, 2, 5, 7, 8, 10-12, 14-17, 19-23, characterized in that the first and second anchor body (30a, 30b) are neodnokratno spaced fastening elements (50).

25. The rotor (20) according to claim 3, characterized in that the first and second anchor body (30a, 30b) are neodnokratno spaced fastening elements (50).

26. The rotor (20) according to claim 4, characterized in that the first and second anchor body (30a, 30b) are neodnokratno spaced fastening elements (50).

27. The rotor (20) according to claim 6, characterized in that the first and second anchor body (30a, 30b) are neodnokratno spaced fastening elements (50).

28. The rotor (20) according to claim 9, characterized in that the first and second anchor body (30a, 30b) are neodnokratno spaced fastening elements (50).

29. The rotor (20) according to item 13, wherein the first and second anchor body (30a, 30b) are neodnokratno spaced fastening elements (50).

30. The rotor (20) p, characterized in that the first and second anchor body (30a, 30b) are neodnokratno spaced fastening elements (50).

31. The rotor (20) in paragraph 24, characterized in that the fastening elements located on the first and second supporting blocks (30a, 30b), made in the form of holes, the location of which may be different.

32. The rotor (20) according to any one of p-30, characterized in that the fastening elements located on the first and second on the priori enclosures (30a, 30b), made in the form of holes, the location of which may be different.

33. Synchronous generator equipped with a rotor (10)according to any one of claims 1 to 32.

34. A method of manufacturing a rotor (10) according to any one of claims 1 to 32, comprising the following steps:
at least two first supporting body (30a) is fixed on the main body of the rotor (10), the first supporting body (30a) is formed on the flanges which are directed towards each other, the input section in each case to one of the second reference body (30b), which are secured between the first support housings (30a)providing a rigid attaching the first anchor body (30a) to the second anchor body (30b),
at least one second anchor body (30b) is injected into the input area formed by the first support housings (30a), while the flanges of the second supporting body (30b) have a design that provides docking with its flanges of the first reference blocks (30a),
the steps described above are repeated to consolidate all of the reference blocks (30a, 30b) on the main body (20).

35. The method according to clause 34, characterized in that after the introduction in the input sections of the second support body (30b) are fixed on the surface of the main body (20).

36. The method according to any of PP or 35, characterized in that before attaching the first anchor blocks (30a) at least one temporary element (60) Zack is Aleut on the main body of the rotor (10), which allows you to save free space for the second anchor body (30b) and removed immediately after mounting the first support housings (30a) and before the introduction of at least one of the second main body (30b).



 

Same patents:

FIELD: electrical engineering.

SUBSTANCE: method includes the following successive steps: a) a set (36) is formed by attaching of at least two unit elements to each other with insulation between them, at that unit elements are magnetised; b) mechanical treatment (68) of main surface for the set of unit elements in order to form cylindrical surface with radius equal essentially to the core radius. The magnetisable set (70) is magnetised; c) magnetised sets are set (72) at the core. At that the above magnetised set forms at least a part of the magnetic pole. Rotor contains the core; at least one magnetic pole is mounted at the core by means of the above method.

EFFECT: ability to resist mechanical impact of magnetic pole during rotor spinning.

10 cl, 8 dwg

FIELD: electrical engineering.

SUBSTANCE: invention may be used, e.g., during installation of a bushing installation around the shaft of an electric machine rotor with permanent magnets or in other devices where the bushing is to be rigidly fixed on the shaft part, simultaneously subject to effects of turning forces, in particular, at a high rotation rate. The proposed method of the bushing installation around the shaft (2) part by way of press fit includes the following steps: installation of a guide element (7, 23) with an external surface (8) that is at least partly conical; installation of the guide element (7, 23) as an extension of the above shaft (1) part (2); the bushing (5) relocation along the guide element (7, 23) onto the shaft (1) part (2); the press (13) relocating in an axial direction towards the conic part (9) during the first stage of the bushing (5) relocation along the guide element (7); usage of a press element (17) with an internal diameter (D10) equal to or in excess of the external diameter (D1) of the shaft (1) part (2) during another stage of the bushing (5) relocation along the guide element (7).

EFFECT: ensuring the possibility of a lengthy bushing press fit installation onto the shaft part at room temperature (the bushing made eg of a synthetic material) to form firm connection between the shaft and the bushing without the risk of the bushing bend or damage with simultaneous saving of time spent on such assembly.

21 cl, 17 dwg

FIELD: electricity.

SUBSTANCE: there proposed is rotor (16) manufacturing system and method, as well as magnetisation method of cylindrical element of electric machine (10), in compliance with which multiple segments (28) of constant magnet are fixed around rotor spindle (24). Desired orientation directions (29) of constant magnet segments (28) are determined. Then, mounted constant magnet segments (28) are placed into magnetisation equipment (44) so that desired orientation directions (29) of constant magnet segments (28) are combined with the appropriate flow directions (74) of magnetisation equipment (44). At that, desired orientation directions of constant magnet segments have such configuration that directions of the next orientation are changed from the direction which is essentially normal to the direction of rotor rotation about D-axis of rotor pole, to the direction which is essentially tangent to rotor rotation direction about Q-axis of rotor pole; desired orientation directions of constant magnet segments are determined by means of magnetic analysis by using finite element method according to the main characteristic of which the desired orientation directions of constant magnet segments are such that almost coincide as to the direction with magnetic flow formed with the magnetisation equipment.

EFFECT: simplifying the design, improving the efficiency and shortening the magnetisation process of constant magnet segments in rotors of electric machines.

13 cl, 6 dwg

FIELD: electricity.

SUBSTANCE: invention relates to electrical engineering and referred to details of rotor manufacture on permanent magnets for electrical motor where permanent motors (4; 36) in inner side of rotor are arranged in parallel to rotor rotation axis (X) and in area of radial external longitudinal edges (8; 16) of permanent magnets (4; 36). Open outwards grooves are available on the external perimetre of rotor. They are tilted or bent to longitudinal edges (6; 18) of adjacent permanent magnets (4; 36) in the direction of perimetre or at least cross it once. The grooves (6; 18) on external side of rotor in the direction of perimetre are less wide than those close the centre of groove section (6; 18). The form of the groove cross section (6; 18) is constant along rotor length. Besides the invention is referred to such rotor manufacture method.

EFFECT: even change of rotor torque moment with maximum efficiency factor and improved effectiveness and simplified motor manufacture and assembly.

19 cl, 13 dwg

FIELD: electricity.

SUBSTANCE: plates are cut of sheets made of non-magnetic material of austenite-martensite grade, which is able to change in process of cold deformation from non-magnet phase to magnet phase, and when further heated - back to non-magnet phase. Such material may be alloy on the basis of austenite-martensite corrosion-resistant steel. At first stock non-magnet sheets are exposed to at least 65% cold pressing, shaping material change over to magnetic phase with magnetic permeability >100 Gs/E. Afterwards, with the help of heating by laser radiation up to 1000 - 1200C, reverse conversion of material phase is carried out in local sections, corresponding to location of non-magnet zones of rotor plates with magnetic permeability =1 Gs/E. Previously prior to heating, absorbing coating is applied onto sections of surfaces that correspond to arrangement of non-magnet zones, and the coating increases thermal effect at least 2.5 times. For reliable preservation of material magnet phase resistance it is optimal that its temperature is at least 500C below temperature of converted local sections heating. After heating and further natural cooling on air, coating is removed, rotor plates are cut as per program and are fixed to each other in axial direction into packet, which is installed on rotor shaft. Heating with laser radiation is carried out by means of sheet surface scanning by focused or non-focused laser beam. Gradient material has high mechanical characteristics (yield point on both phases is at least 80 kG/mm2) while magnetic permeability of magnetic material is at least 100 Gs/E, and non-magnetic - 1 Gs/E.

EFFECT: increased permissible peripheral speed of rotor rotation and increased utilisation ratio of electric machine.

5 cl, 2 dwg

FIELD: electricity.

SUBSTANCE: invention refers to the sphere of electrical engineering and electrical machinery industry and is of relevance for design and development of high-speed synchronous electrical machinery equipped with permanent magnets. Conceptually the invention consists in the process of the electrical machine rotor assembly envisaging an alternating pole magnetic system being mounted on the rotor shaft composed of tangentially magnetised permanent magnets (1) with the poles arranged between them. Under the method proposed the magnetic system consists of regularly alternating magnetic (2) and non-magnetic (3) O-plates with slots for insertion of permanent magnets (1). First the nonmagnetic plates (3) are fixed on the shaft being slipped on the axial pins (4) regularly alternating with the magnetic plates (3) whose outer diameter exceeds that of the magnetic plates. After that all the plates are tightly drawn together in the axial directions with the help of the remaining pins and the projecting edges of the magnetic pales (2) are turn-treated till the latter's outer diameter comes to equal that of the nonmagnetic plates (3); the treatment over, the permanent magnets are mounted.

EFFECT: facilitation of assembly and reduction of labour intensity.

3 cl, 2 dwg

FIELD: electrical engineering; rotors for motors, generators, various power installations such as power stations, welding units, mechanized tools, etc.

SUBSTANCE: proposed rotor designed for use in permanent-magnet machine incorporating flat permanent magnets and magnetic core stacks has nonmagnetic metal casing accommodating core stacks and poles made of magnetically soft metal sheet, as well as flat magnets disposed in nonmagnetic material parallelepiped-shaped holed open on one end so that at least magnets are fixed in these holes by means of easily curing material or by surface of part having temperature expansion compensating means joined to rotor; novelty is that stress concentrators of compensation means are uniformly offset on rotor ring circumference relative to fastening slots and semi-cylindrical depressions on circular surface, as well as relative to one another.

EFFECT: precluded shrinkage cracks in nonmagnetic material of rotor body at crystallization and deformation of its ring upon mechanical treatment.

4 cl, 6 dwg

FIELD: electrical engineering; mechanical design of rotor systems for permanent-magnet commutatorless electrical machines.

SUBSTANCE: proposed rotor magnetic system has electric steel stampings and N-S radially saturated magnets in the form of rectangular parallelepipeds uniformly disposed within stack of rotor stampings over its circumference. Rotor magnetic system section is assembled of four stacks joined by bars whose length is not smaller than that of section; like-polarity magnets alternately disposed in tandem are offset in axial direction through one fourth of stator slot angular pitch. Rotor magnetic system manufacturing process includes fabrication of two types of stampings wherein key slot and fixation holes for assembling stacks in section are offset relative to magnet holes through angles equal to (1/8)(360/Z) and (3/8)(360/Z) of stator slot angular pitch, respectively, where Z is double product of phase number by pole pair number and slot number per rotor pole and stator slot. Stacks whose number should be a multiple of four are assembled by installing magnets in them and joined in sections so as to ensure relative displacement of magnets in stacks arranged in tandem by one fourth of stator slot angular pitch. Alternative manufacturing process for rotor magnetic system includes fabrication of three types of stampings wherein key slot and holes for assembling stacks in section are offset relative to holes for fixation of magnets through angles equal to (3/40)(360/Z), (9/40)(360/Z), and (15/40)(360/Z) of stator slot angular pitch, respectively. Then stacks whose number should be a multiple of six are assembled by installing magnets in them and joined in sections so that magnets are relatively offset in stacks arranged in tandem by one sixth of stator slot angular pitch.

EFFECT: enhanced performance characteristics of commutatorless magnetoelectric machines, facilitated rotor manufacture, enlarged functional capabilities of such machines.

10 cl, 6 dwg

The invention relates to the field of electrical engineering and can be used in the technology of electric machines with permanent magnets of vysokokoertsitivnye material
The invention relates to the field of electrical engineering, and in particular to methods of manufacturing electrical machines with permanent magnets

Electrical machine // 2486652

FIELD: electrical engineering.

SUBSTANCE: electric machine consists of outer case (2) containing bottom (2b) located in fact perpendicular to rotor rotation axis; stator (3) having at least one pole extension (5) and at least one circular winding (8) installed inside the pole extension (5) and rotor (2); at that the case (2) has at least one support area (11) for interaction with respective area (12) of the winding (8) supporting it for the purpose of heat exchange between winding (8) and support area (11); meanwhile the area (12) of winding (8) is insulated electrically from the support area (11) provided that areas (11, 12) interact. At that according to this invention the support area (11) is formed by protrusion (13) of the bottom (2b) oriented inward of the electrical machine (1).

EFFECT: increase of reliability and utilisation efficiency of available produced energy by means of its losses reduction.

20 cl, 6 dwg

FIELD: electrical engineering.

SUBSTANCE: nonsalient pole rotor of synchronous electric machine contains a shaft with flux core having channels for excitation winding, exiting coils laid in channels of the flux core, rings aligning with axial ventilation channels, retaining rings and banding insulation. In pursuance of the present invention retaining rings and banding insulation are made with tangential-oriented radial slots located along length of retaining rings located in several rows preferably opposite gaps between end parts of exciting coils.

EFFECT: improved cooling of front parts of excitation coils located in channels of the core of nonsalient pole rotor of synchronous electric machine.

3 dwg

FIELD: electrical engineering.

SUBSTANCE: core plates are made in the area of internal diameter with slots concentric in relation to this diameter at least in two rows; at that there are at least two slots in each row and bridges between slots are located in the middle of slots in the next row; at that joining of elements fixing core ends to the shaft is made at radial depth from the first row of concentric slots and joining of axial fixing elements to core ends is spread in radial direction to the shaft not farther then the last row of slots from the shaft.

EFFECT: prevention of impact of unevenly compacted rotor core on the rotor shaft of an electrical machine.

4 cl, 5 dwg

FIELD: electricity.

SUBSTANCE: voltage control is carried out in particular due to mechanical displacement of parts of a rotor magnetic system relative to each other, control of which is carried out, for instance, along a feedback circuit, besides, the generator shaft is equipped with inner and outer bushings, freely moving relative to the shaft, at the same time the specified bushings are rigidly connected with one or several keys, and a part of the rotor magnetic system is rigidly connected with the outer bushing, while the second part of the rotor magnetic system is rigidly fixed on the shaft. Mutual displacement of magnetic system parts is carried out due to radial-reciprocal movement of bushings by means of axial action of an electromagnet connected with an inner bushing via a support-radial bearing.

EFFECT: provision of output voltage control from zero to maximum, with self-locking by output voltage removal, when a control signal is not available.

2 dwg

Electric spindle // 2479095

FIELD: electricity.

SUBSTANCE: electric spindle comprises a body, in the cavity of which there is a laminated stator core, equipped with semi-closed slots, in which there are winding coils placed, besides, in the cylindrical cavity of the stator there is a rotor installed as capable of rotation, and its bearing unit is arranged as capable of gas-dynamic support, at the same time the electric spindle is equipped with a clamp for fixation of a working tool. At the same time, according to this invention, conductors of the winding of each stator slot are fixed with a wedge and a key insert contacting with it from insulating material, the cross section of which is made as capable of fixation of the key insert back under the slot wedge, and the ledge section complies with the slot splint section, besides, the profile of the key insert ledge surface corresponds to the surface of the cylindrical cavity of the stator core, the surface of the key insert back along its entire length is equipped with a longitudinal chute, which is open into an inner cavity of the spindle body arranged as capable of supplying air into it, in the cavity of the electric spindle body there are cylindrical bushings placed, the diameter of the cavity of which is equal to the diameter of the cylindrical cavity of the stator core, and between the ends of the stator core and the ends of cylindrical bushings facing them there are support rings installed, the cavity of which exceeds the diameter of the cylindrical cavity of the stator core, equipped with a collar that covers a part of the outer surface of bushings, the specified thrust rings are made of non-magnet material and are fixed with the stator core, and the cylindrical bushings are installed as capable of radial displacement relative to the longitudinal axis of the cylindrical cavity of the stator core, for this purpose contacts of bushings with the body, the end shield and collars of thrust rings are equipped with sealing rings arranged as capable of elastic deformation radially and along the longitudinal axis of the stator core. The rotor is made with inner cavities, for this purpose it comprises coaxial hollow shaft and shell, which are rigidly connected to each other, at least by three links equidistant from each other and made in the form of plates of identical thickness, being aligned radially to the longitudinal axis of the rotor, the ends of the rotor are rigidly fixed to the end covers, for instance, by vacuum-diffusion welding, besides, one of end covers of the rotor is arranged as thickened and is equipped with a clamp for fixation of a working tool.

EFFECT: increased life of electric spindles, including those operating under higher and high frequencies of rotation, with simultaneous provision of minimum rotor sagging and improved cooling of both a rotor and a winding of an electric spindle stator.

3 cl, 2 dwg

FIELD: electricity.

SUBSTANCE: rotor for an electrodynamic machine, in particular, for a hydraulic generator, comprises a body, which is assembled from many segments (10) of sheet metal arranged in axial direction one after another, between segments (10) for creation of cooling channels there are location links (14), which are supported by bolts (12) to carry centrifugal forces acting on them, and the bolts stretch in axial direction through the body of the rotor of sheet metal. At the same time at least one part of the specified location links is assembled from many separate parts at least partially located above each other. Each assembled location link comprises an upper part and a lower part, at the same time one of both specified parts has an expanded first section with a hole for insertion of axial bolts of the body from sheet metal, and also two narrow second sections in the form of radial fingers, which are arranged at the distance from each other, and another one from both specified parts is made in the form of a disc with a hole, at the same time the specified disc with a hole and the specified first section with the hole arranged in it are arranged above each other.

EFFECT: provision of simple facilities of protection for specified location links against hazardous impact of centrifugal forces in process of electric machine operation.

13 cl, 9 dwg

FIELD: electricity.

SUBSTANCE: rotor for an electrodynamic machine, in particular, for a hydraulic generator, comprises a body, which is assembled from many segments (10) of sheet metal arranged in axial direction one after another, between segments (10) for creation of cooling channels there are location links (14), which are supported by bolts (12) to carry centrifugal forces acting on them, and the bolts stretch in axial direction through the body of the rotor of sheet metal. At the same time at least one part of the specified location links is assembled from many separate parts at least partially located above each other. Each assembled location link comprises an upper part and a lower part, at the same time one of both specified parts has an expanded first section with a hole for insertion of axial bolts of the body from sheet metal, and also two narrow second sections in the form of radial fingers, which are arranged at the distance from each other, and another one from both specified parts is made in the form of a disc with a hole, at the same time the specified disc with a hole and the specified first section with the hole arranged in it are arranged above each other.

EFFECT: provision of simple facilities of protection for specified location links against hazardous impact of centrifugal forces in process of electric machine operation.

13 cl, 9 dwg

FIELD: electricity.

SUBSTANCE: linear electric machine, the stator of which consists of two longitudinal round bars (1) with armature winding and transverse bar (2) with excitation winding. According to the invention, runner is made in the form of two cylinders (3) with round holes (4), which are connected by means of jumper bar (5), axes of holes (4) are offset relative to axes of cylinders (3) to the runner periphery.

EFFECT: providing the possibility of interaction of all sections of armature winding with working magnetic flux; increasing use efficiency of armature winding and reducing the consumption of winding conductor.

12 cl, 1 dwg

FIELD: electricity.

SUBSTANCE: invention refers to design of contactless magnetoelectric machines with electromagnetic reduction, and can be used in direct drives, in automation systems, in mechanisms with high moments on the shaft and low rotation frequencies of the shaft, as well as high-frequency electric generators and synchronous frequency converters. The proposed reduction magnetoelectric machine with pole gear-type inductor includes stator, the armature core of which is charged and has salient poles, on inner surface of which elementary teeth are made, coil m-phase armature winding, each coil of which is arranged on the corresponding salient pole of the armature, one on each pole, and rotor containing an inductor with toothed poles with equal number of elementary teeth on each pole, which are symmetrically distributed along cylindrical surface; constant magnets magnetised in tangential direction are located between toothed poles of the inductor. When performing certain relations between the number of salient poles of the armature, number of elementary teeth on salient pole of the armature, number of salient armature poles in the phase, total number of armature teeth, number of toothed poles of the inductor, total number of inductor teeth, number of elementary teeth on toothed pole of the inductor and number of phases of m-phase armature winding of reduction magnetoelectric machine with pole toothed inductor, the method is implemented.

EFFECT: providing high power and operating characteristics, high specific torque moment on the shaft and high electromagnetic reduction of rotation frequency in electric motor mode, as well as high specific power at high EMF frequencies in electric generator mode.

5 cl, 5 dwg

FIELD: electrical engineering.

SUBSTANCE: electric reducer machine with a polar gear inducer contains a stator (its armature core made laminated and having clearly express poles on the inner surface whereof elementary cogs are arranged), the armature m-phase coil winding and a rotor containing an inducer with clearly express gear poles, symmetrically distributed along the cylindrical surface, with coil excitation winding placed on the poles. Electrical connection between the inducer excitation winding and the voltage source is effected via brushes and contact rings of the brush contact unit. Subject to definite ratios between number of clearly express armature poles, number of elementary cogs on a clearly express armature pole, number of clearly express armature poles per phase, total number of armature cogs, number of the inducer gear poles, total number of the inducer cogs, number of elementary cogs per inducer gear pole and number of phases in the m-phase armature winding of the electric reducer machine with a polar gear inducer the technical effect is achieved.

EFFECT: provision for high power and operational indicators, high specific rotation torque on shaft and high electromagnetic reduction of rotation speed in electric motor mode, high specific power at high frequencies of EMF in electric generator mode.

7 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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