Method of assembly for magnetic pole and respective rotor

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

 

The invention relates to a method of assembling a magnetic pole of a rotor of the synchronous rotating electric machine, for example an electric motor or generator.

In document EP 1646126 describes a rotor with magnetic poles, which are formed by several separate permanent magnets separated from each other electrically insulating sheet.

It is known that these magnetic poles are manufactured in accordance with the following steps that are performed in the order described below.

First single elements having the form of rectangular parallelepipeds, the part is subjected to application, receiving a single permanent magnets. Then the unit magnets are connected by bonding with the introduction between them electrically insulating sheet and insert into the recesses made on the outer surface of the rotor. The recess has a convex bottom. Individual magnets are glued to each other and to the convex bottom so that their magnetic poles (North/South) are directed in the same directions.

However, the phase connection by gluing individual magnets very long since joined the unit magnets bonded to each other and repel each other.

Since the flat surface of unit magnets further connects with the surface of the recess having a convex bottom, there are gaps, which form slit the defects, which narrowed on the surface of the magnetic pole produced in this way.

The object of the invention is a method of assembling a magnetic pole, which is simpler and faster.

The invention relates to a method of assembling a magnetic pole of the above-described type, which is characterized by the following stages:

a) forming a set of single elements of the connection one with another, at least two single elements, with the introduction between them of the insulators so that these individual elements were able to be magnetized;

b) the magnetization of a set of single elements;

(C) fixing kit single elements at the core, these sets form at least part of the magnetic pole.

In accordance with a special variant of the invention a method of assembling at least one magnetic pole includes one or more of the following characteristics, taken separately or in combination:

- the set of singular elements is a rectangular parallelepiped, and the method further includes the step of machining the main surface of the set of single elements in order to form a cylindrical surface with a radius almost equal to the radius (R) core, this atamanichenko processing performed before the step of magnetizing

- cylindrical surface has an axis (x-X) of the cylinder axis (x-X) perpendicular to the longitudinal surfaces of the set of singular elements and parallel side surfaces of a set of individual elements

- single elements bonded to each other with an adhesive, and an electric insulator is electrically insulating sheet,

- individual elements are connected with each other by glue, filled with solid particles, or glue, filled with fibers made of non-conductive material with the specified adhesive forms an electrical insulator,

- steps from a) to C) are repeated to obtain multiple sets of single elements, the said sets of single elements are fixed on the core, one after the other, with the introduction between them of an electrical insulator, while the longitudinal surface of the single set of elements forms a side surface of the magnetic pole,

- stage fixing electrical insulator on the core when an electrical insulator placed between the core and the set of single elements,

- stage fixing electrical insulator on the cylindrical surface of sets of individual elements

- a set of single elements contains from 1 to 20 single elements.

The invention relates also to the rotor for rotating synchronous electronic the historical machine, containing the core, characterized in that at least one magnetic pole is made on the core by the method described above.

As a variant, the rotor is made on the core contains a recess with a flat bottom, and sets of single elements are attached to the surface of the bottom.

The invention will be better understood from the following description, given solely as examples, and drawings, on which:

figure 1 is an axial section of an electric motor with permanent magnets containing a rotor in accordance with the invention;

figure 2 is a section along the line II-II of the rotor of figure 1;

figure 3 is a block diagram showing the steps of a method of assembling a magnetic pole in accordance with the invention;

4 is an isometric image of a single element;

5 is an isometric image of a set of single elements;

6 is an isometric image of the set of figure 5 after machining;

Fig.7 is a side view of the set of figure 6; and

Fig - isometric image of the four sets of single elements, which are installed in the recess of the rotor.

The invention relates to a method of Assembly of the magnetic poles on the rotor of a synchronous electric machine. This method is described on the example of the Assembly of the magnetic poles 2, 4 on the rotor 6 of the electric motor 8.

As shown in Fi is .1, the motor 8 includes a stator 10 that is fixed in the housing 12 and the rotor 6 fixed to the shaft 16.

The stator 10, surrounds the rotor 6. It contains winding 18, generating magnetic flux.

The rotor 6 includes a core 20, which is fixed in rotation on the shaft 16 by means not shown in the figures, for example, slots. The core 20 has a cylindrical outer surface of a given radius R. the Core 20 is made entirely of metal or metal alloy, which "holds" the magnetic field, in particular, made of a ferromagnetic material.

The recesses 22, 24 are made on the outer part of the core 20. The recesses 22, 24 are arranged at equal intervals from one another.

The recesses 22, 24 are designed to accommodate the permanent magnets and the magnetic pole.

The recesses 22, 24 have a flat bottom 34. The recesses 22, 24 have a width and length equal to the width 1Eand length LEmagnetic pole 2,

The method of assembling the magnetic pole 2 in accordance with the present invention is illustrated in figure 3. The method begins with step 36, which is the generation of the set of 37 single elements by gluing individual elements 38 and 40 to each other with the installation between the insulators 32 in the form of a sheet, which is below the insulating sheet" (32).

Every single the element is provided 38, 40 made of a magnetic material such as hard magnetic material.

The number of individual elements, for example, from 1 to 20, or preferably from 6 to 10 splicing, connecting them to one another in sets 37.

As shown in figure 4, each individual element 38 has the shape of a rectangular parallelepiped with two major surfaces 42, 44, two longitudinal surfaces 46, 48 and two side surfaces 50, 52.

Its width, for example, may be 6 mm, length from 30 to 60 mm, a thickness of approximately 15 mm

Main surfaces 42, 44 of a single element have a width that ranges from 0.05 to 1 width 1Ethe magnetic pole 2.

Main surfaces 42, 44 of a single element have a length, comprising from 0.05 to 1 length 1Ethe magnetic pole 2.

All longitudinal surfaces 46, 48 of each of the cells 38, 40 is bonded to all surfaces of each insulating sheet 32 so that the set of 37 forms a non-separable unit, which is a single item. Thus, the outer surface of the package 37 is solid. Kit 37 does not contain any defects or cracks.

The sheet 32 provides electrical isolation of the magnets from each other, for reducing the electrical losses that occur due to eddy currents caused by magnetic fluxes passing between the rotor and one hundred is the op.

The insulating sheet 32 does not prevent the penetration of magnetic flux.

The sheet 32 is made, for example, of paper, which consists of fibers, meta-aramid, known as "Nomex" (registered trademark) or polyamide film, known as "Kapton" (registered trademark), or any other insulating material, for example, pure polymer, or polymer with a filler.

The insulating sheet 32 has a small thickness (for example, 20 μm), in comparison with the thickness of the single elements 38, 40.

Kit 37 has the shape of a rectangular parallelepiped. It has two main surfaces 56, 58, two longitudinal surfaces 60, 62, two side surfaces 64, 66.

Length Lblongitudinal surface 60 kit 37 equal to the width of 1Ethe magnetic pole 2. Length LIthe side surfaces 64, 66 of the package 37 is equal to 0.05 to 1 length LEthe magnetic pole 2.

Further, during step 68 machining the main surface 56 of the package is processed to give it a cylindrical shape with a radius R equal to the radius of the core 20 on which you are installing the kit 37.

Cylindrical surface 56 has an axis x-X perpendicular to the longitudinal axis of the surfaces 60, 62 of the set 37 and parallel to the side surfaces 64, 66 of the set 37.

During phase 70 set 3 is magnetized device, ensuring the creation of a strong magnetic field.

The magnetization of the kit is better to make at this stage, because when the pole has already been posted on the rotor, it is impossible to perform due to the size of the rotor and poles, and also the amount of energy that will be required for magnetization.

Kit 37 magnetized so that the magnetic axis, formed during the magnetization is parallel to the longitudinal surfaces 46, 48 single elements 38, 40, forming a set.

During stage 70 is magnetized only set 37, in other words, a set is magnetized separately from the core 20 or from the support, in which is mounted a set of 37.

The set of singular elements 37, designed, forms a single connection (without defects) permanent magnets are separated from each other is inserted between the insulating sheets.

As set 37 is only part of the pole 2, which takes place in accordance with the width of the pole, the size is set small enough so you can magnetize a commercially available device for magnetizing.

During 71 the insulating sheet 32 is attached to the bottom 34 of the recess 22. At step 72 the insulating sheet 32 is attached to the flat surface 58 is already magnetized kit 37. Kit 37 razmisha is raised so that its longitudinal surface 60 is a side surface of the magnetic pole 2.

The height of the set 37 corresponds to the depth of the recesses 22, 24, so the treated surface 56 has a cylindrical shape corresponding to the cylindrical shape of the core 20.

In further stages, from 36 to 72 are repeated in the same order to create and consolidate three other magnetized sets 74, 76, 78 in the recess 22 with the inserted insulating sheet 32. Magnetized sets 37, 74, 76, 78 together form the magnetic pole 2.

Sets 37, 74, 76 and 78, mounted in the recesses 22, all have the same polarity.

In a further four magnetized kit with opposite polarity, are installed and are connected by bonding in the recess 24 with the introduction between them adjacent to the recess 24 of the insulating sheet 32, which creates a new magnetic pole 4.

When you step 75, the unit of magnetic poles is mounted on the core 20, the rotor (6), which is provided with magnetic poles, manufactured in the above manner, is attached insulating sheet 32. This sheet prevents a short circuit between the poles.

In conclusion, the retainer ring 79 for holding the magnetic poles 2, 4 is installed on them during a step 80.

The retainer ring is made of composite material, ka is, for example, glass, carbon and aramid fiber known as Kevlar (registered trademark).

The insulating sheet 32 is attached to the unit of magnetic poles on the stage 75 only in the case when the retainer ring is made of neitoperhosia material, typically carbon fiber.

Alternatively, recesses 22 and 24 have a small depth of 1 to 2 mm, and the interpolar blocks are placed between each magnetic pole.

Alternatively, the insulating sheet 32 can be replaced by an adhesive filler in the form of solid particles that do not have electrical conductivity, or on the adhesive filled with fiber that does not have electrical conductivity.

The insulating sheet 32 is inserted between the magnetized sets 74, 76, 78 may be made of a material different from the material of the insulating sheet 32, which is installed between the unit elements 38, 40.

Alternatively, the insulating sheet 32 is not glued to the rotor 6, but instead is attached to each magnetic pole 2, 4,

Alternatively, individual elements 38, 40 may be of different height, to reduce the amount of material removed during machining 68.

In another embodiment, individual elements have different heights, and each has a main surface 42, which forms a section of a cylindrical surface, and there is no need the diamonds in machining the main surface 56 of the set 37 of single elements.

In another embodiment, individual elements have the shape of a parallelepiped, with the main surface, having a width and length equal to the dimensions of the magnetic poles, but have a height smaller than the pole. In this case, the magnetic pole is formed by laying in a pile of single elements on a rotor axis.

The advantage is that surrounding the insulating sheet 32 facilitates the mounting of the locking ring 79.

The advantage is that the method is applicable to any of a rotor of the synchronous rotating electric machine in which it is necessary to reduce the electrical losses resulting from eddy currents induced by magnetic fluxes passing between the stator and the rotor.

In particular, the method according to the invention can be used to create the rotors of electric motors, the rotor diameter which is greater than 100 mm, or for powerful electric motors (capacity greater than 50 kW).

The benefit is that you simply carry out joining single elements 38 and 40 to each other before they are magnetized. Thus, the Assembly of the magnetic pole is simplified and accelerated.

The advantage is a single bond elements with each other over the entire surface so that they form a piece with no joints or gaps between the individual elements. Magnetic pole, made the first so better resists mechanical stress during rotation of the rotor.

The advantage is that the outer surface of the magnetic pole 2 manufactured in this way is completely cylindrical.

The advantage is that this method reduces the cost of manufacture of the rotors.

The invention also relates to an electric motor that includes a rotor, as shown in figures 1 and 2, the core 20 on which a magnetic pole made in accordance with the above described method.

1. The method of Assembly, at least one of the magnetic poles (2, 4) of the rotor (6) for rotating synchronous electric machine (8) of the single elements (38, 40), the rotor (6) includes a core (20)having a cylindrical outer surface of a given radius (R), characterized in that includes sequential steps, which are:
a) form (36) set (37, 74, 76, 78) of the single elements in the form of a rectangular parallelepiped by attaching to each other, at least two single elements (38, 40) with the placement between the electrical insulator (32), these single elements (38, 40) are magnetized,
b) mechanically treated (68) main surface (56) of the set (37, 74, 76, 78) of single elements for the formation of a cylindrical surface, the radius of which is, beings who, equal to the radius (R) core (20),
c) the part is subjected to application (70) the set of singular elements(37, 74, 76, 78),
d) set (72) set (37, 74, 76, 78) of individual elements in the core (20)with the above set (37, 74, 76, 78) of single elements is at least part of the magnetic pole.

2. The method according to claim 1, characterized in that a cylindrical surface (56) has an axis (x-X) of the cylinder, and the axis (x-X) perpendicular to the longitudinal surfaces (60, 62) set (37, 74, 76, 78) of single elements and parallel to the side surfaces (64, 66) of the set (37, 74, 76, 78) of single elements.

3. The method according to claim 1 or 2, characterized in that the individual elements (38, 40), are attached to each other using an adhesive, and electrical insulator (32) is electrically insulating sheet.

4. The method according to claim 1 or 2, characterized in that the individual elements (38, 40) are attached to each other by glue, filled with solid particles, or glue, filled with fibers made of non-conductive material with the specified adhesive forms an electrical insulator (32).

5. The method according to claim 1 or 2, characterized in that steps a) to d) are repeated to obtain multiple sets (37, 74, 76, 78) of single elements, and these sets (37, 74, 76, 78) mounted on the core (20) one after the other at the location between the insulators (32), while cont is supplemented flax surface (60, 62) set (37, 74, 76, 78) of single elements forms a side surface of the magnetic poles (2, 4).

6. The method according to claim 1 or 2, characterized in that it includes a step (71), which fix the insulators (32) on the core (20), and the insulators (32) is located between the core (20) and these sets (37, 74, 76, 78) of single elements.

7. The method according to claim 1 or 2, characterized in that it includes a stage (75), which fix the insulators (32) on the cylindrical surface (56) kits (37, 74, 76, 73) unit elements.

8. The method according to claim 1 or 2, characterized in that the set (37, 74, 76, 78) of single elements contains from 1 to 20 single elements (38, 40).

9. The rotor (6) of a rotating synchronous electric machine (8), containing the core (20), characterized in that at least one magnetic pole (2, 4) is installed on the core (20) by means of the method according to any one of claims 1 to 8.

10. The rotor (6) according to claim 9, characterized in that the core (20) includes recesses (22, 24) with flat bottom surfaces (34), while the set (37, 74, 76, 78) of single elements attached to the said bottom surface (34).



 

Same patents:

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 µ>100 Gs/E. Afterwards, with the help of heating by laser radiation up to 1000 - 1200°C, reverse conversion of material phase is carried out in local sections, corresponding to location of non-magnet zones of rotor plates with magnetic permeability µ=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 500°C 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

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

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: 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: 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 µ>100 Gs/E. Afterwards, with the help of heating by laser radiation up to 1000 - 1200°C, reverse conversion of material phase is carried out in local sections, corresponding to location of non-magnet zones of rotor plates with magnetic permeability µ=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 500°C 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 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: 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: 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: 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

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: 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

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