Rotor and method to manufacture rotor of electric machine

FIELD: electricity.

SUBSTANCE: method to manufacture a rotor (14) is proposed for an electric machine (13), including the following stages of its realisation: a) manufacturing of a magnetic element (8) by means of adhesion of permanent magnets (1, 1', 1", 1'") to each other with the help of the first glue, at the same time each permanent magnet (1, 1', 1", 1'") has one side (2) with the magnetic north (N) and one side (3) with the magnetic south (S), at the same time permanent magnets (1, 1', 1", 1'") when adhered are arranged so that sides of the magnetic north (N) or sides of the magnetic south (S) form a common lower side (3, 3', 3", 3'") of the magnetic element (8), at the same time the first glue in the hardened condition has the solid consistency; b) adhesion of the lower side of the magnetic element (8) with the yoke (12) with the help of the second glue, at the same time the second glue in the hardened condition is soft and elastic, which eliminates break of the second glue as the temperature of expansion of the magnetic element (8) and the yoke (12) increases. At the same time the yoke (12) in the place where the magnetic element (8) is adhered to the yoke (12), has the soft and elastic layer (2).

EFFECT: provision of rationality of rotor manufacturing process with permanent magnets with simultaneous provision of high reliability of permanent magnets fixation with closure on material of an electric machine rotor yoke.

3 cl, 7 dwg

 

The invention relates to a method of manufacturing a rotor of an electric machine. In addition, the invention relates to a corresponding rotor for an electric machine.

In many electrical machines, such as motors or generators, the movable rotor has permanent magnets, which must be mounted on the rotor yoke, because the subsequent magnetization of permanent magnets in most cases impossible. In addition, it is often necessary, depending on operating conditions, to protect the permanent magnets from the environment, such as, for example, humidity and corrosive environments. These requirements contradict cost-efficient manufacturing, in particular, in a large number.

In the prior art it is known in the rotors bonding permanent magnets with extra bandages for protection against disconnection from the yoke of the rotor and protection from environmental conditions. After winding rotor bandage impregnated with resin, which then hardens. Using bandages in connection with the resin is achieved mechanically loaded mounting permanent magnets on the yoke.

In addition, it is known bonding/filling of permanent magnets in housings and mounting housings on the supporting plate and the mounting base plate on the yoke of the rotor. In the axial direction of the rotor yoke is carried is only supporting plates. For individual mounting implemented using connection weights and/or geometric snapping.

In addition, in particular, for small machines know the location of the permanent magnets in the pockets inside the yoke of the rotor in which permanent magnets vidvigayt and paste. In this case, the perceiver effect fastening of the permanent magnets is implemented using due to the shape of the pocket connection with geometric circuit. Adhesive bonding is used only to prevent shifting of permanent magnets in the axial direction inside pockets.

In DE 102004062753 describes the lacquer system that can be applied in the uncured state as a mounting adhesive for permanent magnets. However this requires a very special installation and increasing the temperature.

From DE 102004058454 known method of manufacturing a magnetic system and constructed in accordance with the magnetic system, in which permanent magnets are glued together and/or with other components.

From DE 19820033 known method of bonding for the manufacture of permanent magnets.

In addition, from the publication of the company LOCTITE known bonding permanent magnets with different adhesives.

From DE 102005032721 A1 famous block magnet with protection against corrosion. In this publication for protection block magnet is in from corrosion disclosed block magnet, which is made of separate magnets, each magnet has protection against corrosion, and a separate magnets by gluing to form a block magnet. Block magnets are designed in particular for use in electric machines.

The objective of the invention is to enable efficient manufacturing is equipped with permanent magnets of the rotor of the machine, with permanent magnets with high reliability are fixed circuit material on the rotor yoke.

This problem is solved using the method of manufacturing a rotor for an electric machine, which contains the following stages of the method:

a) manufacturing the magnetic element by bonding with each other permanent magnets with the first adhesive, with each permanent magnet has one side with a magnetic North pole and one side with a magnetic South pole, the permanent magnets by gluing placed so that the sides of the magnetic North poles or the sides of the magnetic South poles form a common lower side of the magnetic element with the first adhesive hardened state has a firm consistency, and

b) bonding the bottom side of the magnetic element with the yoke using a second adhesive, the second adhesive is cured state is soft and supple,

when this yoke is the place in which the magnetic element is glued to the yoke, has a soft and elastic layer.

Due to the fact that the yoke in place, in which the magnetic element is glued to the yoke, has a soft and elastic layer can be reduced layer thickness of the second adhesive and thereby reduced time to curing of the second adhesive that enables rapid fabrication of the rotor.

In addition, this problem is solved by using a rotor for an electric machine, the rotor has magnetic elements and the yoke, the magnetic elements are permanent magnets, each permanent magnet has one side with a magnetic North pole and one side with a magnetic South pole, the permanent magnets of the magnetic element bonded to each other by using the first adhesive so that the sides of the magnetic North poles or the sides of the magnetic South poles form a common lower side of the magnetic element with the first adhesive hardened state has a firm consistency, with the lower side of the magnetic elements glued using a second adhesive with the yoke, while the second adhesive is cured state is soft and supple.

It should be emphasized that, according to the invention, the magnetic elements and, in particular, permanent magnets are fixed solely by adhesive bonding with the aid of the completion of the second adhesive with the yoke, in particular, with the surface of the yoke. Magnetic elements and, in particular, permanent magnets are fixed on the yoke exclusively by means of the second adhesive. Thus, in the mount, according to the invention, the magnetic elements and, in particular, permanent magnets on the yoke is not used in connection with geometric and/or power circuit for implementing fastening. It should be noted that generated by the permanent magnets, the magnetic force of attraction to the yoke is not in the sense of the invention the fastening or connection with the yoke.

Preferred embodiments of the method result from the dependent claims. Similarly, preferred embodiments of the rotor follow from the preferred embodiments of the method, and Vice versa.

Preferably, when the first adhesive is a fast-hardening adhesive, as in this case can particularly quickly produce magnetic elements.

Preferably, when the second adhesive is made in the form of silicone glue. Silicone glue is easy to handle and in the hardened state is elastic and soft. Silicone adhesives are typically used as the sealing means.

In addition, preferably, when the thickness of the layer of glue between the bottom side of the magnetic element and the yoke is 0.4-4 mm In thickness is a layer of glue between the bottom side of the magnetic element and the yoke of 0.4-4 mm magnetic element can greatly lengthen relative to the yoke when the temperature changes, without a gap or gaps of the second adhesive or magnetic material.

In addition, preferably, after the execution stage (a) of the way from the upper side of the magnetic element glued the cap using a second adhesive, and the cap has a side part, via the second adhesive glue with the side surfaces of the magnetic element. Due to this, it is possible to achieve that the magnetic element is completely surrounded by a second adhesive, and thus the permanent magnets are protected from harmful influences of the environment, such as, for example, penetrating into the rotor moisture or corrosive environment.

In addition, preferably, when the rotor is constructed as an external rotor and the magnetic element is located on the inner side of the yoke. This location is in the outer rotors usual location of the magnetic element.

In addition, preferably, when the yoke in place, in which the magnetic element is glued to the yoke has a recess for accommodating the magnetic element. In this case, it is especially simple to position the magnetic element.

In addition, preferably, when the recess has at least two steps. By performing the notches in the form of a two-stage extraction can be particularly simply and quickly the manufacture of the rotor and simple way to ensure a constant thickness of the layer of glue between which the magnetic element and the yoke.

In addition, preferably, when the first and second glue harden at room temperature. This ensures a particularly simple and, therefore, the rational manufacture of the rotor.

In addition, it is preferable electric machine which has a rotor according to the invention. The electric machine is usually made in the form of a generator or motor, when the electrical machine in the form of the generator of the electric machine can be performed, for example, in the form of a wind generator.

Below is a detailed explanation of the invention on the basis of two examples with reference to the accompanying drawings, which schematically:

figure 1 is a permanent magnet, in isometric projection;

figure 2 - section of the magnetic element;

figure 3 - cut fitted cap magnetic element;

figure 4 - section provided with a cap magnetic element, on the bottom of the magnetic element;

5 is a machine with a rotor according to the invention;

6 is a part of the rotor device for stacking the magnetic element, in an enlarged scale; and

Fig.7 is a part of the rotor device for stacking the magnetic element in another variant implementation of the invention, in an enlarged scale.

Figure 1 shows in isometric projection constant magnet. The permanent magnet 1 has a magnetic North pole and magnetic South pole. The magnetic North pole is located, according to figure 1, on the upper side 2 of the permanent magnet 1, i.e. lines of the magnetic field overlook on the upper side 2 of the permanent magnet 1 and the magnetic South pole is located on the lower side 3 of the permanent magnet 1, i.e. lines of the magnetic field is fixed in the lower side 3 of the permanent magnet 1. Thus, the permanent magnet 1 has one side with a magnetic North pole and one side with a magnetic South pole, while both sides are located opposite one another. In addition, the permanent magnet 1 has the end surface 5.

In the first stage of manufacture of the rotor of the electric machine, the magnetic element 8, which is shown schematically in figure 2 in cross section, made of several shown in figure 1 of the permanent magnets. Thus manufacturing the magnetic element 8 is made by bonding with each other, the permanent magnets 1, 1', 1” and 1'” with the first adhesive, while the permanent magnets in the first exemplary embodiment are made by bonding so that the sides of the magnetic South poles, i.e. in the exemplary embodiment, the bottom side 3, 3', 3” and 3'”, form a common lower side of the magnetic element 8. In an alternative permanent magnets can be also featu the wife when gluing so, what aspects of magnetic North poles form a common lower side of the magnetic element 8.

Figure 2 schematically shows a sectional resulting magnetic element 8, while the end faces 5, 5', 5” and 5'” of the individual magnetic elements shown in the front view on the end faces 5, 5', 5” and 5'”. Between the individual magnetic elements is the adhesive layer 4, which consists of the first adhesive. It should be noted that in figure 2 and subsequent figures, the thickness of the adhesive layer 4 is depicted enlarged in comparison with the actual thickness.

The first adhesive hardened condition is solid, i.e. it has a firm consistency, such as, for example, the consistency of the game cube made of plexiglass, or such as, for example, the consistency of solid furniture Polish, or such as, for example, the consistency of the plastic housing of the mobile phone. Because individual permanent magnets 1, 1', 1” and 1'” strongly repel each other, due to solid after curing and thus inelastic first adhesive is prevented that after curing of the first adhesive individual permanent magnets can move away from each other, as it would be at least a little, perhaps with the use of soft and elastic glue. To enable rapid and therefore persons who NGOs rational manufacture of the rotor of the first adhesive preferably is quickly solidified, in particular, high-strength adhesive, so that the individual permanent magnets must use the appropriate device to compress with each other by bonding only a short time during solidification to achieve a certain degree of hardening the first adhesive. As mentioned above, the first adhesive is a fast-hardening adhesive, the first adhesive reaches maximum after 5 minutes, most preferably after 2 minutes of strength which is sufficient to permanent magnets, in spite of their magnetic force of repulsion from each other to 0.5 N/mm2glued surfaces are kept connected to each other, when you delete a device that compresses each other permanent magnets by gluing. With the ultimate strength can be achieved only after several hours. At the same time as the first adhesive is suitable, for example, adhesive LOCTITE® 648 with a suitable activator glue company LOCTITE or, for example, two-component without mixing glue Bondmaster® 533 firm Bondmaster.

Both of these glue harden at room temperature, which provides a particularly simple manufacture. Thus, for bonding does not require heating and cooling of permanent magnets.

In the first stage of production receive the permanent magnet 8. Because of the rotor clean the Dimo several magnetic elements 8, the first stage is preferably performed so often, until you have made all the necessary rotor magnetic elements.

In one preferred variant of carrying out the invention in one exemplary embodiment in an additional stage with a magnetic element 8 glue the cap 7, as shown in section in figure 3. The same elements in figure 3 are denoted by the same positions as in figure 1 and 2.

The cap 7 mounted on the upper side of the magnetic element 8, while it is formed, as shown in figure 2, the top sides 2, 2', 2” and 2'” of the individual permanent magnets. The cap 7 are glued with a second adhesive to the upper side of the magnetic element 8. The cap 7 is held down side parts 24, which, by means of the second adhesive glue with the side surfaces of the magnetic element 8. Between the cap 7 and the magnetic element 8, as shown in figure 2, is composed of a second adhesive to the adhesive layer 6. It should be noted that in figure 3, as well as the following figure 4, the thickness of the adhesive layer 6 is shown larger than in reality.

Figure 4 shows educated so magnetic element 8 in the section on the bottom of the magnetic element 8. Thus the same elements are denoted by the same positions as in figure 2 or figure 3.

The second adhesive is glue, which in the hardened state is what I am soft and elastic, ie has a soft texture and is elastic. At the same time as the second adhesive can be applied, for example, adhesive DOW CORNING® Q3-3526 with an appropriate catalyst adhesive DOW CORNING or glue RT 778/T Wacker.

Under soft and supple in the framework of the invention refers to, for example, the usual consistency of the cured silicone adhesive, i.e. the consistency of the elastomer. Thus, the second adhesive is made in the form retinoblastoma material.

Resulting from use of materials of the cap 7 and the permanent magnets when heated, various extensions of the magnetic element and the yoke are compensated by using the second adhesive, so that the cap 7 retains its shape, for example, when the temperature of the magnetic element 8.

The adhesive layer 6 and the cap 7 form an effective protection of the permanent magnets from penetrating into the rotor moisture or corrosive environments, such as, for example, aggressive gases.

It should be noted that in the subsequent fitted cap magnetic element is also called only magnetic element and is denoted by position 8.

Thus manufacturing is shown in figure 1-4 the magnetic elements can be done in advance prior to installation of the magnetic elements in the rotor yoke so that the magnetic elements, which are necessary for the manufacture of the rotor, are already all in the presence of p and the magnetic elements on the rotor yoke, what makes them particularly rational manufacture of the rotor.

Figure 5 schematically illustrates in isometric projection machine 13, which may be performed, for example, in the form of an electric motor or generator.

Machine 13 is located stationary stator 9, which is located on the support 11 of the stator winding 10, for clarity, only one winding is provided with a position 10. When this winding is shown in figure 5 only symbolically in the form of rectangles.

Around the stator 9 is rotatably around the stator 9 and the rotor 14 according to the invention. When the rotor 14 rotates around the axis R of rotation. The rotor 14 has as an essential element of the yoke 12, preferably from Mahamantra material, while the yoke is made of a solid or can have multiple contiguously in the direction of the axis R of rotation of the metal sheets. If necessary, the yoke may have as part of a yoke still hanging items. When metal sheets are electrically isolated from each other. In addition, the rotor 14 has as essential elements still above the magnetic elements, for clarity, figure 5 only one magnetic element designated by position 8. In the framework of the exemplary embodiment, the magnetic elements are located on the inner side 23 of the yoke 12, and the rotor is ispolnen in the form of an external rotor, i.e. the stator is inside, and the rotor is arranged around the stator.

In an embodiment of the machine 13, in which the rotor is made in the form of the inner rotor, i.e. the rotor is inside, and the stator is arranged around the rotor, the permanent magnets can also be located on the outer side of the yoke.

For the manufacture of rotor 14 of the magnetic element 8, and then also other magnetic elements connected to the yoke 12. This exercise, according to the invention, by bonding the bottom side of the magnetic element 8 with the yoke, in particular with the upper side of the yoke, using a second adhesive. Since the second adhesive, as mentioned above, is in the hardened condition soft and elastic consistency, during the increase of temperature expansion of the magnetic element 8 and the yoke 12, which is typically made of iron-containing metal, does not lead to rupture of the second adhesive. For optimal compensation of different thermal expansion between the permanent magnets of the magnetic element 8 and the yoke 12, the thickness of the adhesive layer from the second adhesive between the bottom side of the magnetic element and the yoke is preferably 0.4 to 4 mm, In particular, when the thickness of the adhesive layer, on the one hand, no formation of cracks in the layer the layer and, on the other hand, still provides acceptable for the manufacture of rotor time having hardened the deposits of the second adhesive.

Figure 6 schematically shows the yoke 12 and the magnetic element 8 in an enlarged scale. While the yoke 12 is in place, in which the magnetic element 8 is glued to the yoke, the recess 21 to accommodate the magnetic element 8. In this regard, examples of the implementation of the recess 21 preferably has two steps that take place with different depth in the yoke 12, and the second step 15 has a thickness d. In this regard, the example of performing the second step 15 when gluing fill the second glue to fill them second step 15, so educated so the adhesive layer 16 is preferably slightly thicker than the thickness d of the second step 15 of the recess 21. Then use the capture 17 laying device 18 of the magnetic element 8 is placed on the first rung 22 of the recess 21 for bonding. Thus the width of the first steps 22 and the second step 15 is chosen, i.e. consistent with the dimensions of the magnetic element 8 so that the magnetic element 8 is adjacent to the first rung 22. When laying the magnetic element 8 unnecessary second adhesive is displaced and is located on the side (item 19) on the magnetic element 8 and the yoke 12. By choosing the thickness d of the second step 15 is an easy way to set the thickness of the second adhesive, which connects the magnetic element 8 and the yoke 12.

Figure 6 does not depict applied, according to the invention, in the recess at the e in advance with the bonding of the soft and elastic layer 20, which is located in the recess 21. Soft and elastic layer 20 is a part of the yoke 12.

It should be noted that the recess 21 does not necessarily have to be. In place, in which the magnetic element 8 must be connected to the yoke 12, the yoke 12 may be applied, for example, the second adhesive, and the stacking device 18 then lowers the magnetic element 8 so far in the second adhesive until it reaches the desired thickness of the layer of the second adhesive, and then holds the magnetic element in this position until harden the second adhesive.

It should be noted that instead of the steps can be applied also to other spacers.

The second adhesive completely surrounds the permanent magnets that are performed, usually in the form of rare earth permanent magnets, and thereby provides a reliable protective layer, which protects the permanent magnets from the external environment (such environments as, for example, liquids or gases), which can damage the permanent magnets.

7 shows another embodiment of the invention, which is essentially the same as shown in Fig.6 option of carrying out the invention. The same elements are denoted by 7 in the same position as figure 6. The only significant difference 7 compared to 6 is that in the recess of the shows already entered by gluing soft is s and the elastic layer 20, which is located in the recess 21. Soft and elastic layer 20 is a part of the yoke 12. At the same time soft and elastic layer 20 is, for example, from the second adhesive, which is already hardened. Thus bonding the bottom side of the magnetic element 8 with the yoke 12 is carried out so that the soft and elastic layer 20 preferably put just a thin layer of a second adhesive, which usually speeds up the hardening of the adhesive connection. Of course, you can also apply a thicker second layer of glue on the soft and elastic layer 20.

It is also possible, of course, also in this second embodiment, a connecting magnetic element 8 in the absence of the notches 28, similarly to the previous example run with the yoke 12 by means of the second adhesive.

It should be noted that, of course, if desired, the yoke 12 in places, which must be installed with magnetic elements to implement a flat surface to ensure opportunities are particularly good adhesion of the magnetic elements with the yoke 12 may be provided with a flat support surface of the magnetic element in the form of a hinged element, which is connected with another element of the yoke (for example, metal plates of the yoke), for example, by means of a screw connection or connections with geometric circuit. The magnetic elements and h is particularly the permanent magnets are fixed exclusively with the second adhesive on the support of the magnetic elements of the yoke and thereby on the yoke. Thus, in the mounting of the magnetic elements and, in particular, permanent magnets on the pole of the magnetic elements of the yoke and thus the yoke for the implementation of the fasteners do not participate connection with geometric and/or power circuit.

In addition, it should be noted that the rotor, for example, when running the machine in the form of a linear motor, can also make a reciprocating movement.

In the framework of the exemplary embodiment, the machine has a capacity greater than 10 kW and, in particular, greater than 1 MW. Just in such relatively large machines because of the large forces of repulsion and attraction of permanent magnets manufacture of the rotor using known from the prior art method of connection of the magnetic elements and yoke connection weights and/or geometric circuit is complicated and expensive. Therefore, the invention especially preferably in such relatively large machines.

1. A method of manufacturing a rotor (14) for the electric machine (13), containing the following stages of the method:
a) manufacturing the magnetic element (8) by bonding with each other permanent magnets(1, 1', 1", 1'") using the first adhesive, with each permanent magnet(1, 1', 1", 1'") has one side (2) with the magician who itym the North pole (N) and one side (3) with magnetic South pole (S), while permanent magnets(1, 1', 1", 1'") when gluing located so that the parties(2, 2', 2", 2'") magnetic North poles (N) or hand(3, 3', 3", 3'") magnetic South poles (S) form a common lower side(3, 3', 3", 3'") the magnetic element (8), the first adhesive hardened state has a firm consistency, which prevents the possibility of moving permanent magnets(1, 1', 1", 1'") from each other, and
b) bonding the bottom side(3, 3', 3", 3'") the magnetic element (8) from the yoke (12) using a second adhesive, the second adhesive is cured state is soft and supple, with soft and elastic consistency leads to the fact that during the increase of temperature expansion of the magnetic element (8) and the yoke (12) does not lead to rupture of the second glue
while the yoke (12) in place, in which the magnetic element (8) is glued to the yoke (12), has a soft and elastic layer (20).

2. The method according to claim 1, wherein the first adhesive is a fast-hardening glue.

3. The method according to any one of claims 1 or 2, characterized in that the second adhesive is made in the form of silicone glue.

4. The method according to claim 1, characterized in that the thickness (d) of the layer of glue between the bottom side(3, 3', 3", 3'") the magnetic element (8) and the yoke (12) is 0.4-4 mm

5. The method according to claim 3, characterized in that the thickness (d) of the layer of glue between the bottom side(3, 3', 3", 3'") magnetic ele is enta (8) and the yoke (12) is 0.4-4 mm

6. The method according to claim 1, characterized in that after the execution of stage a) of the way from the upper side(2, 2', 2", 2'") the magnetic element (8) glue the cap (7) using a second adhesive, and the cap (7) has a lateral part (24)that using a second adhesive glue with the side surfaces of the magnetic element (8).

7. The method according to claim 4, characterized in that after the execution of stage a) of the way from the upper side(2, 2', 2", 2"') the magnetic element (8) glue the cap (7) using a second adhesive, and the cap (7) has a lateral part (24)that using a second adhesive glue with the side surfaces of the magnetic element (8).

8. The method according to claim 5, characterized in that after the execution of stage a) of the way from the upper side(2, 2', 2", 2'") the magnetic element (8) glue the cap (7) using a second adhesive, and the cap (7) has a lateral part (24)that using a second adhesive glue with the side surfaces of the magnetic element (8).

9. The method according to claim 1, characterized in that the rotor (14) made in the form of an external rotor, and the magnetic element (8) located on the inner side (23) of the yoke (12).

10. The method according to claim 4, characterized in that the rotor (14) made in the form of an external rotor, and the magnetic element (8) located on the inner side (23) of the yoke (12).

11. The method according to claim 7, characterized in that the rotor (14) made in the form of an external rotor, and the magician is any element (8) located on the inner side (23) of the yoke (12).

12. The method according to claim 8, characterized in that the rotor (14) made in the form of an external rotor, and the magnetic element (8) located on the inner side (23) of the yoke (12).

13. The method according to claim 1, characterized in that the yoke (12) in place, in which the magnetic element (8) is glued to the yoke (12)has a recess (21) for accommodating the magnetic element (8).

14. The method according to claim 4, characterized in that the yoke (12) in place, in which the magnetic element (8) is glued to the yoke (12)has a recess (21) for accommodating the magnetic element (8).

15. The method according to claim 7, characterized in that the yoke (12) in place, in which the magnetic element (8) is glued to the yoke (12)has a recess (21) for accommodating the magnetic element (8).

16. The method according to claim 10, characterized in that the yoke (12) in place, in which the magnetic element (8) is glued to the yoke (12)has a recess (21) for accommodating the magnetic element (8).

17. The method according to claim 11, characterized in that the yoke (12) in place, in which the magnetic element (8) is glued to the yoke (12)has a recess (21) for accommodating the magnetic element (8).

18. The method according to item 13, characterized in that the recess (21) has at least two steps (15, 22).

19. The method according to claim 1, characterized in that the first and second adhesives harden at room temperature.

20. The method according to claim 3, characterized in that the first and second adhesives harden at room temperature.

21. The method according to claim 6, characterized in that the first and vtoro the adhesives harden at room temperature.

22. Rotor for an electric machine (13), the rotor (14) has magnetic elements (8) and the yoke (12), the magnetic elements (8) are permanent magnets(1, 1', 1", 1'"), each permanent magnet(1, 1', 1", 1'") has one side (2) with the magnetic North pole (N) and one side (3) with magnetic South pole (S), with permanent magnets(1, 1', 1", 1'") the magnetic element (8) is glued with each other by using the first adhesive so that the parties(2, 2, 2", 2'") magnetic North poles (N) or hand(3, 3', 3", 3'") magnetic South poles (S) form a common lower side(3, 3', 3", 3'") the magnetic element (8), the first adhesive hardened state has a solid consistency, which prevents movement of the permanent magnets(1, 1', 1", 1'") from each other, the lower side(3, 3', 3", 3'") the magnetic elements (8) are glued together using a second adhesive with a yoke (12), while the second adhesive is cured state is soft and supple, with soft and elastic consistency leads to the fact that during the increase of temperature expansion of the magnetic element (8) and the yoke (12) does not lead to rupture the second adhesive, and the yoke (12) in place, in which the magnetic element (8) is glued to the yoke (12), has a soft and elastic layer (20).

23. Electric machine, in this case the electric machine (13) has a rotor on p.22.

24. Electrical machines is on item 23, characterized in that the electrical machine (13) is made in the form of a generator or motor.

25. Electric machine according to paragraph 24, wherein the generator is designed as a wind generator.



 

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1 dwg

FIELD: engines and pumps.

SUBSTANCE: proposed permanent magnet motor consists of n equal modules, each of which includes a housing, a stator with phase windings, a rotor with constant magnets, which are magnetised in radial direction. Similar phase windings of adjacent modules are connected in series, housings and rotors of modules are connected to each other mechanically, and each module includes circular orientation elements of the stator with phase windings and rotors. At that, according to this invention, in each rotor, one half of magnets is offset relative to the other half in a circumfenertial direction by the half of the tooth division of stator tzs, and in adjacent modules, similar magnets of rotors are offset in a circumferential direction through value tzs/(2n).

EFFECT: improvement of start-up properties of permanent magnet motor owing to reducing pulsations of reactive moment; providing reliable connection of modules and permanent magnet motor as a whole.

2 cl, 5 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

Electric motor // 2476977

FIELD: electricity.

SUBSTANCE: electric motor comprises a salient-pole stator with a control winding and a rotor with poles from permanent magnets arranged on ends and adjacent parts of side surfaces of a rotor magnetic conductor. Between adjacent magnets of the rotor pole arranged on the end and adjacent parts of side surfaces of the rotor magnetic conductor, additional magnets are introduced, polarity of which matches polarity of the rotor pole.

EFFECT: higher efficiency of operation of a magnetic system of an electric rotor and its specific torque and efficiency increase.

1 dwg

FIELD: electrical engineering.

SUBSTANCE: magnetoelectric machine rotor system consists of two coaxial rotors. The external (outer) rotor is designed in the shape of a hollow cylinder of high-strength, non-magnetic and electrically non-conductive material with constant magnets uniformly fixed thereon; the magnets are magnetised in a radial direction and have alternating polarity. There are gaps between the external rotor magnets wherein the retaining elements are positioned made of a non-magnetic and electrically non-conductive material. The internal rotor is designed in the shape of a shaft of a magnetically soft material, toothed on the outside, the internal rotor teeth number equal to that of the external rotor permanent magnets. The internal rotor radial bearings are positioned outside the external rotor bearings. The external rotor axial bearing is represented by axial magnetic forces of interaction between the permanent magnets of the external rotor, the stator core and the shaft.

EFFECT: provision for the rotor system rotors strength margin and increasing the proper frequency to a value in excess of rotation rate.

16 cl, 3 dwg

Electric machine // 2474945

FIELD: electricity.

SUBSTANCE: electric machine comprises a tight body, in the cavity of which a laminated stator core is installed with open slots, where winding coils are arranged, and a rotor. At the same time the laminated stator core is equipped with radial packet-to-packet ventilation channels, aerodynamically communicated longitudinal channels of the body with inlet holes communicated via a filter with environment, conductors of the winding of each stator slot are fixed with a wedge and a key insert contacting with it, the cross section of which is arranged as capable of fixing the key insert back under the slot wedge, and the section of the ledge corresponds to the section of the slot splint, the surface of the key insert back along its entire length is equipped with a longitudinal chute communicated with packet-to-packet ventilation channels of the stator core, volumes of key inserts protruding above the surface of the stator core cavity are combined into a tubular bushing, preferably made from segments, with formation of the inner surface of cylindrical shape, besides, in the cavity of the body there are cylindrical bushings installed, the diameter of the cavity in which is equal to the diameter of the tubular bushing, between ends of the stator core and ends of cylindrical bushings facing them there are thrust rings installed, the cavity of which exceeds the diameter of the cylindrical cavity of the stator core, equipped with a collar, covering a part of the outer surface of the cylindrical bushing. Thrust rings are made of non-magnetic material and are fixed with a stator core, 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, end shield and thrust rings are equipped with sealing rings made with the possibility of elastic deformation radially and along the relatively longitudinal axis of the stator core. The electric machine comprises an inductor with the outer cylindrical surface made of poles, permanent magnets, non-magnet wedges, a shaft, the length of which exceeds the length of the inductor, besides, with the inductor ends there are end cylindrical bushings fixed rigidly, which are made of a non-magnetic material and arranged aflush with the outer surface of the inductor.

EFFECT: invention provides for minimum sagging of a rotor, improved cooling of a rotor and a stator winding with simultaneous reduction of weight and dimension indices and higher resources of electric machines, including those operating under higher and high frequencies of rotation.

3 cl, 2 dwg

FIELD: electricity.

SUBSTANCE: invention describes direct rotation generator that includes holder of iron cores and rotating shaft arranged on holder of iron cores. The first and the second rotating discs are located on two corresponding ends of rotating shaft. The first iron core is located on holder of iron cores, and the first winding is located at the periphery of holder of iron cores. The first sealing plate is located on the first rotating disc; the first magnet is located on the first rotating disc or on the first sealing plate, and surface of the first magnet and surface of the first sealing plate share one surface. The fourth magnet is located on the second rotating disc. The first magnet and the fourth magnet correspond to two ends of the first iron core, and poles of the first and the fourth magnets, which face each other, are opposite. One end of the first iron core includes liquid tank that is filled with magnetic liquid; at that, end of the first iron core, which is filled with magnetic liquid, contacts the first sealing plate. The main magnetic flux of direct rotation generator and magnetic flux created with induced current are horizontal and parallel to iron core, which considerably reduces the impact of resistance on rotation of iron core and magnets.

EFFECT: saving of energy for generation of electric energy and increase in generator efficiency.

10 cl, 5 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

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.

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

FIELD: electricity.

SUBSTANCE: submersible synchronous electric motor contains stator with imbricated core installed in stator casing, the core has radial teeth on inner surface; inside stator there is rotor consisting of m stacked packs divided by central bearings; at outer surface of rotor there are also teeth; between rotor and stator there is a minimum positive allowance and at stator poles there are identical wound inductance coils connected into phases. Each phase consists of two parallel paths, and each path includes in-series diode and coils; diodes in parallel paths are connected in opposition. According to the invention at that each pole of stator has two grooves in which there is a slot wedge made of dielectric material; diodes are collected to rectifier block installed in stator; number of rotor central bearings is m+1, and rotor is fixed in stator due preloaded installation of the bearings.

EFFECT: improving operational reliability and increasing service life of the electric motor, optimising workability of its manufacturing process.

5 cl, 2 dwg

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