Method of making rotor of external rotary engine and rotor of external rotary engine

FIELD: electricity.

SUBSTANCE: in the process of making an external rotor (17) of an engine, permanent magnets (7) are placed along the peripheral surface (4) of a cylindrical pattern (1); a cylindrical ring (8) is placed on the outer surface of the permanent magnets with pretensioning, wherein the opening (14) of the lower element (13) of the rotor is placed concentrically relative to the peripheral surface (3) of the pattern (1). The invention also relates to the design of a rotor made according to said method. The present method enables to assemble a rotor not in the direction from its outer side to its inner side, but from its inner side to its outer side.

EFFECT: providing high accuracy of positioning inner sections of permanent magnets relative the opening in the lower, ie inner, element of the rotor, or to the position of the engine shaft so as to obtain an air gap with very small clearance, using a pattern which can be made while observing high accuracy of its geometrical dimensions, considerably low cost of making the disclosed rotor.

11 cl, 8 dwg

 

The invention relates to a method of manufacturing a rotor vneshnetorgovoe of the engine, whereby the cylindrical ring is placed permanent magnets having the shape of ring segments, and a cylindrical ring connected to the lower element having a Central hole for the shaft of the engine.

In addition, the invention relates to a rotor vneshnetorgovoe of the engine that contains the bottom element with a Central hole for the motor shaft and the cylindrical ring located concentrically with the specified Central hole and mounted on the lower element, and on the inner peripheral surface of the cylindrical rings are permanent magnets having the shape of ring segments.

Unassertive engines are used, for example, in hermetically sealed refrigeration compressors, installed, for example, in household refrigerators and air conditioning systems. For as little as possible to limit the useful refrigerated space, these compressors must have a small height. Based on these considerations as engines in such systems it is preferable to use unassertive motors with external rotors. Such engines have a lower height than the engines with internal rotor, with the same performance.

JV is a method for manufacturing a rotor vneshnetorgovoe engine described, for example, in document DE 102008017276 A1, in which it is proposed to use lower ring element with a Central hole and an annular wall, passing in the radial direction. On the inner side of the annular wall of the fixed cylindrical ring. Then on the inner surface of the cylindrical ring is placed permanent magnets having the shape of ring segments, with between adjacent permanent magnets have fastening elements. Thus, by means of the mounting element and the lower element to prevent axial movement of the permanent magnets. Radial movement of permanent magnets prevent the fastening elements and the cylindrical ring resting on an annular wall of the bottom element.

The above method enables to produce reliable rotors for unasserting engines. However, in order to increase the efficiency of such engines, you must be able to accurately adjust the air gap between the outer rotor or the inner surface of the permanent magnets and the inner stator. In the known production methods providing such Opportunities is quite time-consuming.

Thus, the objective of the invention is to provide a simpler method of manufacture of the rotor, providing for the possibility of what the devices small air gap between the stator and the rotor.

In accordance with the proposed invention, this problem is solved by the method described in the section related to the technical field of the invention in which permanent magnets are placed along the peripheral surface of the cylindrical template, then on the radial outer surfaces of the permanent magnets establish a cylindrical ring, after which the lower connecting element with the specified cylindrical ring so that the hole is concentric with the peripheral surface of the template.

In contrast to the known method of assembling the rotor in the direction from the outside to the inside, in which the position of the permanent magnets is determined by the external axial bearing surface, in accordance with the proposed method, the internal areas of permanent magnets disposed on the outer peripheral surface of the cylindrical template, which, at the same time, sets the position of the holes provided in the lower element and intended for the motor shaft. The position of the inner sections of the permanent magnets, thus, aligned directly on the motor shaft, or the center hole, and not in the direction from the outer side by positioning the peripheral surface and a cylindrical ring. Because of this, valid is the deviation of the size of the lower element or a cylindrical ring, possible in the manufacturing process, does not affect the positioning of the permanent magnets and their situation. Precision manufacturing of the rotor is determined only by the precision of the template and, therefore, possible distortions of shape and tolerances of the individual permanent magnets and the cylindrical rings have no effect on the size of the inner diameter of the finished rotor.

Preferably, the bottom element is fixed on the axial front side of the cylindrical ring, in particular by welding or gluing. There are also other ways of fastening. The position of the lower member with respect to the cylindrical ring, therefore, is not determined by the form, in particular, the radial speed area of the lower element. On the contrary, the positioning can be carried out only on the basis of the template, which specifies the position of the lower element, or the holes on the bottom of the element relative to the permanent magnets. The cylindrical ring is fixed on the lower element only after placing the specified cylindrical ring around the permanent magnets. Thus, the position of the cylindrical ring relative to the lower element is determined by the position of the permanent magnets relative to the holes on the bottom of the element.

Preferably, use a template that contains the first is the under, having a first peripheral surface and a second section having a second peripheral surface, and the second section has a smaller diameter than the first section, and both sections are located concentrically with respect to each other. The outer diameter of the first section or the first peripheral surface, corresponds exactly to the sum of the nominal outer diameter of the stator and the desired air gap between the stator and the rotor. The diameter of the second section, or the outer diameter of the second peripheral surface that corresponds to the diameter of the hole in the bottom element. The position of the permanent magnet having the shape of ring segments, the first peripheral surface, thus, determines their position relative to the second peripheral surface, or relative to the holes drilled in the bottom element. If necessary, the template may include a third section having a larger diameter than the first section and located at the side of the first section, which is the furthest away from the second section, and the specified third section serves as an axial support surface for the permanent magnets.

In this regard, the axial position of the permanent magnets is also determined by the template that simplifies the manufacture of the rotor.

Preferably, between each two adjacent permanent magnets is raspolagayut fastening element. First, such fasteners fix these permanent magnets relative to each other and, in particular, prevents the movement of the permanent magnets in the radial direction inside. In addition, they can be connected with a cylindrical ring with a clamp. Thus, the fastening elements may partially or completely cover the axial direction of the permanent magnets facing away from the bottom element, which also prevents axial movement of the permanent magnets.

Preferably, the cylindrical ring in the axial direction is stepped area of the lower element. Thus, the area of the holes of the bottom element in the axial direction is located at a distance from permanent magnets or cylindrical rings. Because of this provided more space for installation of the stator, and in particular, may also be provided that in the axial direction of the radial inner sections of the permanent magnets is completely covered by the stator, which is beneficial to the efficiency of the engine.

Preferably, the cylindrical ring features a permanent magnet with pre-tension. When placing a cylindrical ring, the permanent magnets are pressed against the peripheral surface of the template. Thus, pedwar the positive tension compensates for possible tolerance limits so that the permanent magnets are held in a cylindrical ring without a gap. Pre-tension may be sufficient to hold the cylindrical ring is pressed against the permanent magnets. In this case, there is no need to use additional means of fixation.

In accordance with a preferred variant of the invention, a cylindrical ring made in the form of an open ring, and the ring is pressed to the magnets on the outside in the radial direction and is closed by a closing element. This simplifies Assembly, since the ring can be placed around the permanent magnets without significant effort, and, therefore, prior to the installation of the closing element, the magnets will not be exposed to pre-tension.

Particularly preferably, the closing element was for a permanent magnet. Such location of the closing ring will be less likely to obstruct the magnetic flux through the cylindrical ring.

The objective of the present invention solved through the rotor, as described in the section relating to the technical field of the invention, due to the fact that the cylindrical ring attached to the bottom element of the axial front side, and a radial outer peripheral surface of cylindrical the CSOs ring is not fixed.

Such a rotor can be manufactured by the method proposed by the present invention. Since the radial outer peripheral surface of the cylindrical ring is free and a cylindrical ring attached to the bottom element only axial front side, positioning a cylindrical ring relative to the lower element in a radial direction relative ease. Thus, the position of the cylindrical ring on the lower element does not determine the position of the permanent magnets relative to the lower element. On the contrary, the cylindrical ring can be aligned with the first permanent magnets, regardless of the lower element, and only then is attached to the bottom element. Thus, the position of the permanent magnets or the inner surface of the permanent magnets relative to the center hole located in the lower element and intended for the direction of the motor shaft, can be adjusted very precisely and independently of tolerance in the form of a cylindrical ring and the bottom of the element.

Preferably, between each two adjacent permanent magnets is located the locking means, in particular, the elastic locking means holding the place of the permanent magnets due to landing on the form. Such fixing of the medium is in determines the axial position of the permanent magnets and the position of the permanent magnets relative to each other. The elasticity of the locking device can dissipate voltage peaks, making it possible to hold the permanent magnets due to landing on the form, and during Assembly is the elastic deformation of the locking means.

Preferably, the outer radius of curvature of permanent magnets having the shape of ring segments, larger than the inner radius of the cylindrical rings. In accordance with this variant of the invention, permanent magnets are based on cylindrical ring only at the two specified points. This configuration supports facilitates the manufacture of the rotor, as in this case there is no need to provide an exact match between the external radius of the permanent magnets and the inner radius of the cylindrical ring, as is required in the case of manufacturing an extended support surface permanent magnets. Thus, it is possible to minimize the risk of damage to fragile permanent magnets, which may be caused by errors in the manufacturing process of the rotor.

Hereinafter the invention is described in detail based on the preferred option implementation and with reference to the drawings, in which:

on Figa-1f show the stages of fabrication of the rotor

- figure 2 shows the rotor with a spatial separation of the elements;

- figure 3 shows a top view of the rotor.

On Figa pok is Zan template 1, required for the manufacture of the rotor and containing the first section 2, having a first peripheral surface 3 and a second compartment 4 having a second peripheral surface 5. The first section 2 and the second section 4 is located concentrically with respect to each other, and the second section 4 is located axially on the front side of the first section 2. On the other side of the first section 2, which is remote from the second section 4, is the third section 6, which has a larger outer diameter than the first section 2. The second section 4 has the smallest diameter.

The diameter of the first section 2 corresponds to the sum of the nominal outer diameter of the stator and the desired air gap between the stator and the rotor. The diameter of the second section 4 corresponds to the diameter of the motor shaft. The diameter of the third section 6 is not of great importance, because the third section 6 serves only as an axial support surface for the permanent magnets.

On Fig.1b shows the stage at which the permanent magnets 7, which has the shape of ring segments, disposed on the peripheral surface 3 of the first section 2. The third section 6 serves only as an axial support surface for the permanent magnets 7.

On Figs shows the next step of the proposed method, which is on the outer radial surface of the permanent magnets 7 have a cylindrical ring . In the finished rotor, a cylindrical ring 8 is annular yoke for the magnetic flux and generates a tension force directed radially inward and acting on the permanent magnets 7.

On Fig.1d shows a top view of the template 1, the permanent magnets 7 and the cylindrical ring 8 is already aligned with the first section 2. Between the permanent magnets 7 are arranged fastening elements 9. The fastening elements 9 have the legs 10, 11 of the V-shaped form corresponding to the form of the peripheral surfaces of the ends of the permanent magnets 7. In addition, the fastening elements 9 are radially directed lugs 16, made with the possibility of connection with the inner wall of the cylindrical ring 8. Since the internal diameter of the permanent magnets 7 essentially corresponds to the outside diameter of the template 1, the installation of a cylindrical ring 8 prevents excessive load on the magnets.

A cylindrical ring 8 can be closed or to have the slot 12, as shown by the dotted line. This slot 12 can be closed with a closing element, not shown in the drawing. This means that the cylindrical ring 8 pull on permanent magnets 7 from their radial outer surface. Thus, the permanent magnets 7 are pressed against the peripheral surface 3 of the first section 2 of the template 1. So about the time, possible very accurately to position the inner surface of the permanent magnets 7 relative to the peripheral surface 3.

On File showing the stage at which the second section 4 pattern 1 set lower element 13 having a hole 14. Thus, the lower element 13 is also positioned relative to the template, making the position of the hole 14 in relation to the permanent magnets 7 are set by the template 1. After fixing the position of the individual elements, the lower element 13 is attached to the axial front side 15 of the cylindrical ring 8. In this embodiment of the invention, the lower element 13 is attached to the cylindrical ring 8 by welding.

On Fig.1f shows the final stage of the proposed method, the template 1 is removed from the finished rotor 17. In the lower element 13 performs the 18 holes designed to drain into the sump of lubricating oil accumulated in the rotor during its operation.

Figure 2 shows the rotor 17 with the spatial separation of elements, illustrating the individual components of the rotor 17. Under this option the lower element 13 includes a stepped section 19 that is designed to support a cylindrical ring 8 in the axial direction. A cylindrical ring 8 made in the form of an open ring with the slot 12 and the closing element 20, having four is, corresponding to the shape of the slot 12.

Fasteners 9 are axial projections 21, 22, 23, intended for the axial fixing of the permanent magnets 7.

Figure 3 shows a top view of the finished rotor 17. In the drawing it is seen that the external radius of the permanent magnet 7 is greater than the inner radius of the cylindrical ring 8. Thus, the permanent magnets are based on a cylindrical ring 8 at only two points 24, 25. Since the internal diameter of the permanent magnets 7 essentially corresponds to the outside diameter of the template 1, the installation of the cylindrical ring is created radially-directed force acting on the magnets at the points 24, 25 toward the center of the rotor. This avoids stress on the Central parts of the permanent magnets 7, the presence of which could cause damage to the relatively fragile permanent magnets.

The proposed method allows for the Assembly of the rotor is not in the direction from outside to inside and from inside to outside. This enables high-precision positioning of the inner sections of the permanent magnets relative to the hole in the bottom element or the position of the motor shaft, thereby to provide an air gap with very small tolerances. Through the use of a template that m is can be constructed to meet the high precision of its geometrical dimensions, production costs for manufacturing the above-described rotor is small.

1. A method of manufacturing a rotor vneshnetorgovoe engine, in which a cylindrical ring placed permanent magnets having the shape of ring segments, and a cylindrical ring connected to the lower element having a Central hole for the shaft of the engine, characterized in that the permanent magnets are placed along the peripheral surface of the cylindrical template, then on the radial outer surfaces of the permanent magnets is placed a cylindrical ring, and then the bottom element connected to a cylindrical ring so that said hole is located concentrically with the peripheral surface of the template.

2. The method according to claim 1, characterized in that the lower element is fixed on the axial front side of the cylindrical ring, in particular, by welding or gluing.

3. The method according to claim 1 or 2, characterized in that use the template that contains the first section having a first peripheral surface and a second section having a second peripheral surface, and the second section has a smaller diameter than the first section, both sections are located concentrically with respect to each other.

4. The method according to claim 1 or 2, characterized in that between each two neighboring permanent magnets of razmisha the t of the fixing element.

5. The method according to claim 1 or 2, characterized in that the cylindrical ring axially placed a stepped area of the lower element.

6. The method according to claim 1 or 2, characterized in that the cylindrical ring is placed on a permanent magnet with pre-tension.

7. The method according to claim 1 or 2, characterized in that the cylindrical ring is performed in the form of an open ring, and the ring is pressed to the magnets on the outside in the radial direction and is closed by a closing element.

8. The method according to claim 7, characterized in that the closing element is placed over a permanent magnet.

9. The rotor vneshnetorgovoe engine, in particular, made in accordance with the method according to claims 1 to 8, containing the lower element with a Central hole for the motor shaft and the cylindrical ring mounted concentrically with the Central opening and surrounding the opening indicated, and a cylindrical ring attached to the bottom element, and on the inner peripheral surface of the cylindrical rings are permanent magnets having the shape of ring segments, wherein the cylindrical ring (8) is fixed on the lower element (13) axial front side (15), and a radial outer peripheral surface of the cylindrical ring (8) is not fixed.

10. The rotor according to claim 9, characterized in that between the AC is hard two adjacent permanent magnets (7) is the fastening element (9), in particular, the elastic fastening element holding the permanent magnets (7) in place by landing on the form.

11. The rotor according to claim 9 or 10, characterized in that the outer radius of curvature of permanent magnets having the shape of segments (7) of the ring larger than the inner radius of the cylindrical ring (8).



 

Same patents:

Synchronous machine // 2486653

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

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.

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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.

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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

FIELD: electricity.

SUBSTANCE: disclosed rotary MHD machine has disc rotors and collectors for inlet and outlet of the working medium, mounted in parallel in a housing. According to the invention, working elements which convert energy of the working medium to mechanical energy and then to electrical energy are disc rotors made from electroconductive porous material which is pervious on at least one end surface and are mounted with possibility of counter-rotation while providing electrical contact with each other on electroconductive areas of the rotor shafts which alternate with insulated areas of shafts in checkered order relative each other. Each pair of rotor discs lying in the same plane is placed between poles of permanent magnets placed in a perpendicular plane to axes of the rotors and is connected in series to only one pair of voltage contacts on shafts so as to allow series-flow of current through each disc of both rotors.

EFFECT: design of a multifunctional magnetohydrodynamic (MHD) machine, high emf generated by the MHD machine.

3 dwg

FIELD: electricity.

SUBSTANCE: magnetic device of electrical machine is equipped with ferromagnetic basis (4) that has the first side (3) and the opposite second side (5) and end-to-end channels, for example, openings for coolant piping coming from the first side (3) to the second side (5) and several first segments (1) of the coolant piping which are inserted into the above channels. The first segments (1) of the coolant piping are U-shaped and thus by their free ends (2) of shoulders they come through two channels from the first side (3) so that with their ends (2) of shoulders they come from the second side (5) of the basis (4), and respective two of the above shoulder ends of the first segments (1) of coolant piping are connected by the second segment of the coolant piping. Thus two types of segments for the coolant piping are required to construct the coolant piping system. At that according to this invention the second segment (6) of the coolant piping from the second side (5) of the basis (4) forms approximately a trapezoid and at least one more second segment (6) of the coolant piping comes between the second segment (6) of the coolant piping and the second side (5) of the basis (4) in order to connect ends (2) of shoulders of the first segment (1) of the coolant piping.

EFFECT: simplification of installation procedure for coolant piping in a magnetic device of the electrical machine.

5 cl, 5 dwg

Electric motor // 2490772

FIELD: electricity.

SUBSTANCE: electric motor contains a rotor with pole permanent magnets magnetised radially and number of poles more than two and a stator consisting of a magnet core in the form of a hollow cylinder and a symmetrical three-phase biplane single-layer winding at inner surface with minimum gaps required for stator assembly between lateral surfaces of working areas of the coils. Working areas of the coils are located along the electric motor axis; at that number of coils in a phase circuit is selected as equal to the number of pole permanent magnets of the rotor.

EFFECT: increasing specific electromagnetic torque of an electric motor by improvement of operating efficiency of its stator winding.

2 dwg

Electric motor // 2490772

FIELD: electricity.

SUBSTANCE: electric motor contains a rotor with pole permanent magnets magnetised radially and number of poles more than two and a stator consisting of a magnet core in the form of a hollow cylinder and a symmetrical three-phase biplane single-layer winding at inner surface with minimum gaps required for stator assembly between lateral surfaces of working areas of the coils. Working areas of the coils are located along the electric motor axis; at that number of coils in a phase circuit is selected as equal to the number of pole permanent magnets of the rotor.

EFFECT: increasing specific electromagnetic torque of an electric motor by improvement of operating efficiency of its stator winding.

2 dwg

FIELD: electrical engineering.

SUBSTANCE: synchronous inductive generator contains radial spoke-shaped rotor elements and a ferromagnetic base with stator elements including excitation sources, coils and magnetic conduits. According to the invention, the stator elements are designed in the form of two modules mounted on the ferromagnetic base, the base proper oriented parallel to the spoke-shaped rotor element. The proposed synchronous inductive generator needs no specially manufactured rotor element.

EFFECT: improvement of reliability and weight and dimension indicators of synchronous inductive segment generators with simultaneous increase of their technological effectiveness and design simplification.

2 dwg

Generator // 2488210

FIELD: electrical engineering.

SUBSTANCE: in the generator containing the front and rear cover with holes there is a stator in the form of a bundle with inducing windings, rotor with excitation source and claw-shaped tips and a rectifier according to this invention in the area of bending of claw-shaped polar tips there are ventilating inserts made as bases with fins and holes located in-between. Due to manufacturing of simple and easy producible ventilating inserts which can be made, for example, of plastic, intensification of heat processes is reached because number, width and height of ventilating fins in connection with slots in the area of bending of claw-shaped tips are compatible with number and square area of standard fans and it allows either reducing a number of standard fan blade or decreasing their width and it some cases it is reasonable to reject installation of a fan itself.

EFFECT: reduction of power consumed for ventilation and thermal and physical characteristics, improvement of operational performance for generator.

3 dwg

FIELD: electrical engineering.

SUBSTANCE: segmental induction generator contains radial spoke-shaped rotor elements, stator base, magnet cores, excitation coils and source. At that according to the invention stator is made as two flat-topped magnet cores with different-sized supports; moreover short supports are in magnet contact with the excitation source while long supports are in contact with working air gap. There's no customised rotor element in this segmental induction generator and high production effectiveness is attained due to the fact that the operation of magnet core manufacturing includes only cutting of one of supports for standard flat-topped magnet cores.

EFFECT: reduction of magnetic loss with simultaneous increase if production effectiveness of the segmental induction generator.

3 dwg

Synchronous machine // 2486653

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

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; 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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