Rotor on permanent magnet

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

 

Description

The present invention concerns a rotor of a permanent magnet motor, and method of manufacturing such a rotor with permanent magnets.

For motors with permanent magnets in the rotor are distributed along the perimeter of the permanent magnets. For the most economical Assembly of the rotor are massive permanent magnets, which are arranged parallel to the axis of rotation of the rotor in the inner part of the rotor. This arrangement has the disadvantage that the character of change of engine torque is unwanted peaks or waves. In order to achieve uniform changes in torque, as is well known in the rotor in the region of the edges of the permanent magnets is made cavities or grooves, in which the magnetic flux is interrupted or reduced. The grooves are made spiral or passing obliquely, so as to achieve uniform changes in torque. Performed on the outer perimeter of the rotor, the grooves are, however, a large air gap between the rotor and the stator and thus reduce efficiency.

Therefore the task of the invention is to provide an improved rotor of a permanent magnet motor, which makes possible the uniform nature of the variation of torque with the maximum high is PD.

This problem is solved by means of the rotor permanent magnet motor with the features indicated in paragraph 1 of the claims.

In particular, the preferred method of manufacturing such a rotor with permanent magnets is achieved by the features indicated in paragraph 15 of the claims. Preferred options for implementation are given in the respective dependent claims.

In the rotor of a permanent magnet according to the invention the permanent magnets in the inner part of the rotor parallel to the axis of rotation of the rotor. This can be located massive permanent magnets, which width are or radially, or tangentially in the inner part of the rotor. In the area of the radially outer longitudinal edges, i.e. in the region of the longitudinal edges of the permanent magnets that are located closest to the outer perimeter of the rotor, the rotor is made open to the outside grooves. These grooves are inclined or curved toward the longitudinal edges of adjacent permanent magnets in the direction of the perimeter, i.e. essentially in a spiral along the peripheral surface of the rotor. By means of these slots the peak torque during rotation of the rotor decreases and results in an even character of change of torque. The grooves thus located so that the middle line of each the second groove, at least once crosses the longitudinal edge of the adjacent permanent magnet. Consequently, all of the longitudinal edge of the permanent magnet can be magnetically isolated from the outside perimeter of the rotor and stator by means of a groove in order to improve the characteristic of torque.

In addition, the grooves on the outer side of the rotor in the direction of the perimeter have a smaller width than lying radially closer to the center area of the groove, and the cross-sectional shape of the groove along the length of the rotor is constant. That is, the cross-section of the groove in the rotor along the length of the rotor in the direction of the perimeter is shifted only in a spiral, but otherwise permanently. Due to the fact that the width of the groove on the outer perimeter of the rotor narrow facing the stator air gap of the rotor in the area of the groove can be kept small, so that the decrease in efficiency due to the groove is minimized. By extending groove to the inner part of the rotor is achieved that the notch in the end region facing to the permanent magnets, or the base of the groove has a width of such a size that when the strong inclination of the groove enough he opens longitudinal edge of the permanent magnet, so that in this area to interrupt the magnetic flux in the inner part of the rotor core. By facing radially inside the wider area of the base interrupted the magnetic flux between the North is grave and South poles of the magnet in the inner part of the rotor in the region of the longitudinal edges of the magnet. Consequently ensures that the magnetic flux is predominantly directed through the stator, it provides a higher efficiency of the engine.

Preferably, there are at least as many slots as permanent magnets, so that each end edge of the permanent magnet is sufficient magnetic isolation through the slots. Permanent magnets can be located thus directed radially in the rotor or tangentially or aligned in the rotor in the form of a chord.

Preferably, the rotor comprises at least two connected with each other in the longitudinal direction of the pre-manufactured rotary modules, with each module of the rotor section of the permanent magnet, and each of the rotary module has on its outer perimeter section of the groove, and connected with the rotary modules section of the groove of the individual rotor modules together form the slots of the rotor, and sections of the permanent magnet of the individual rotor modules together form the permanent magnets of the rotor. Through a combination of different rotary modules can be formed by the rotors of different lengths. The Assembly should be connected to each other only individual rotor modules. After this is no longer necessary to insert the permanent magnets in the assembled rotor, as the permanent magnets consist of separate sections of the permanent magnet, which have already been placed in a rotary modules. Thus, there is no need for different lengths (in the direction of the longitudinal axis of the rotor of the rotor to produce permanent magnets of different lengths. Sections of the permanent magnet of the individual rotor modules in the Assembly of a rotor are arranged so that respectively one section of the permanent magnet of one rotor module is located on the same line as the section of the permanent magnet of the second rotor module. This means that section of the permanent magnet to form a permanent magnet, which is along the length of the rotor is parallel to its axis of rotation. Section groove on the individual rotor modules are preferably made so that they are in the United rotary modules are connected to each other and thus form a continuous grooves on the outer surface of the rotor.

This may, for example, be due to the fact that the section of the groove of each rotary module is inclined to the longitudinal edge of the adjacent section of the permanent magnet in such a way that on each side of the rotor module centerlines of sections of the groove in the direction of the perimeter respectively have the same given distance from the longitudinal edges of the sections of the permanent magnet. This ensures that the section of the permanent magnet and the section of the groove on the end side of the rotary module always have opredeleniya each other. Thus, all of the rotor modules are identical interface, which contributes to the fact that the individual rotor modules are arranged so that their end sides of both sections of the permanent magnet, and the section of the groove are aligned with each other or attached to each other. Thus made a solid groove in the shift field of the permanent magnet, which is made up of several sections of the permanent magnet in the longitudinal direction of the rotor.

Further, preferably the middle line of each section of the groove intersects the longitudinal edge of the adjacent section of the permanent magnet, at least once. This means that the relevant section of the groove lies radially outside obliquely through the longitudinal edge of the relevant sections of the permanent magnet. In the case where the section of the groove intersects the adjacent longitudinal edges of the sections of the permanent magnet only once or odd number of times, the ends of the sections of the grooves on both opposite end faces of the rotor modules in the direction of the perimeter are located on opposite sides of the associated longitudinal edges of the permanent magnets. To such rotary modules could be used to assemble the rotor with solid grooves shall be provided with rotary modules with different, i.e. oppositely inclined sections of the groove, so that d is and rotary module, when they are under a certain angle rotated relative to each other, can be stacked on top of each other in such a way as to form at its outer perimeter of a continuous zig-zag grooves.

Alternatively, it is possible that sections of the groove on the rotary modules, their average lines cross several times, respectively, the longitudinal edges of adjacent segments of permanent magnets. In the case where the section of the groove of its average line crosses the longitudinal edge section of the permanent magnets twice or more even number of times, the ends of the sections of the groove on both face ends of the rotary modules are always in the same direction from the longitudinal perimeter edges of the sections of the permanent magnet.

Further preferably, the rotor has at least two rotary module in the direction of the axis of rotation of the rotor have different lengths, and can be achieved more accurate gradation of different lengths of the rotor, which are obtained from the rotary modules.

At least one of the rotary module is preferably a section of the groove, which are respectively executed inclined so that the average line of the groove sections on both of the opposite end sides of the rotary module in the direction of the perimeter in the same direction are equally far removed from the longitudinal edges of the adjacent permanent magnet the century This arrangement, particularly preferably in the above-described case in which section of the groove its average lines cross adjacent longitudinal edges of the rotor modules twice or more even number of times. This arrangement gives the possibility that all of this is done in such a way rotary modules can be set arbitrarily at each other, and the section of the groove of the individual rotor modules at the joints between the individual rotor modules are found, so that the outer surface of the rotor can be made a solid grooves. The section of the groove of the individual rotor modules thus preferably so connected with the joints between the individual rotor modules that rotary joints between modules is formed on a corner or bend in the groove.

The grooves and/or section of the groove are, for example, zig-zag to the longitudinal edges of adjacent permanent magnets or sections of the permanent magnet. The zigzag course of the groove may be such that a rotary modules are connected to each other with oppositely inclined sections of the groove, or the section of the groove in the rotary module are zigzag. The zigzag course of grooves or groove sections has the advantage that each rotary module can be provided that the existing section of the groove in the desired area perimeter or angle of rotation lies h is cut longitudinal edge of the adjacent section of the permanent magnet, to create preconditions for the aligned nature of the change in engine torque. Then thus made different rotary modules can be arbitrarily connected to form the rotors of different lengths so that the entire length of the rotor longitudinal edges of the permanent magnets evenly overlap passing obliquely grooves, in order to achieve uniform changes in torque.

Preferably the grooves are respectively designed in such a way that they essentially overlap, respectively, along the entire length of the rotor, at least the longitudinal edges of adjacent permanent magnets in the radial direction. This means that the length of the rotor prominent in every position of the rotor outer longitudinal edges of the permanent magnets on the outer perimeter of the rotor overlap passing obliquely groove. The groove is preferably such angle and such width that, in spite of the slope, every place essentially overlaps or is in contact with the longitudinal edges of the permanent magnets. When this overlap is made so that there are always parts of the groove, prominent on the outer perimeter of the rotor radially outward from the longitudinal edges of the permanent magnets.

Further preferably, the grooves are arranged so that accordingly the groove overlaps the radially outer p is dolinie edges of two adjacent permanent magnets in the radial direction. Such an implementation option, in particular for arrangement of the permanent magnets is feasible, while the permanent magnets are in the direction of the chord of a circle tangentially into the inner part of the rotor. With this arrangement, the longitudinal edges of two adjacent with each other, the permanent magnets are always facing each other and are directly adjacent to each other. Radially outer longitudinal edges of two permanent magnets which are adjacent to each other, the small distance between the longitudinal edges of the permanent magnets to overlap passing obliquely groove. This groove or section of a groove of which holds the groove are inclined angle to the longitudinal axis of the rotor and the width of the groove, which ensures that at each location along the longitudinal axis of the rotor both longitudinal edges adjacent each other permanent magnets overlap the groove in the radial direction. That is, extending from the longitudinal edges in the radial direction to the outside part of the groove or notch located at each location in the direction of the longitudinal axis of the rotor.

Further preferably, the grooves or sections of the groove forming the grooves have a cross-section of dovetail". This cross-section gives the chance to groove on the outer perimeter of the rotor had a possible small is Irina, while he extends to the inner part of the rotor and the base of the groove has a greater width in the direction of the perimeter. While the base of the groove is preferably so widely that each position in the direction of the length of the rotor longitudinal edge of the adjacent permanent magnet or longitudinal edges adjacent each other permanent magnets overlap a part of the base of the groove.

According to another variant implementation, next to the longitudinal edges of the permanent magnets in the surrounding material of the rotor is made of the cavity, which preferably is connected with the adjacent groove. These cavities on the longitudinal edges of the permanent magnets prevent or reduce the magnetic short circuit through the rotor material, is provided so that the magnetic flux is essentially passes through the stator.

Preferably the rotor is made of a large number nakaweesi each other rotary plates of sheet iron, and the cavity is made in a part of the rotary plates of sheet metal and are preferably between two adjacent permanent magnets. The rotor or rotary modules are made of separate rotary plates of sheet iron, which are superimposed on each other, for example, by way of die packaging. In particular, when the cavity is made on the longitudinal edges posto is the R magnets, which are connected with the adjacent grooves on the outer perimeter of the rotor, it may be preferable that the cavity were not made in each rotary plate of sheet iron, but to separate the rotary plates of sheet iron in their respective fields remained jumper to hold together the individual rotor segments between the permanent magnets and slots.

According to another variant implementation of the rotor and the individual rotor modules are made of a large number of rotor plates of sheet iron or made of solid, preferably of sintered segments and between adjacent with each other segments performed receiving cavity for permanent magnets. In this embodiment, permanent magnets are radially specialise between rotor segments. Preferably, also made passing obliquely grooves between the individual rotor segments, i.e. the rotor segments are in the area of the perimeter of the rotor the same distance from each other, which defines the groove. In order to make the rotor of several rotary modules, respectively, the individual rotor modules can be composed of segments of rotor modules, and between segments of the rotor modules are sections of the permanent magnet and the outer perimeter of the issue is lnany passing obliquely section of the groove.

Further preferably, if at least in one part of the grooves or additional channels made in the rotor, are electrical conductors. In the assembled module of the rotor may be provided in addition, in each rotary module corresponding slots or channels with spaced electric conductors, whereby when the rotor Assembly modules, the individual segments of the conductors at the junction between the rotor modules are in contact with each other to form passing through in the longitudinal direction of the rotor of the electric conductors. The conductors may, for example, be obtained by filling the grooves or channels copper. This is the location of the conductors allows the option of making a rotor for use in motor direct start, which is a hybrid engine, when running driven type induction motor and in the future as a permanent - magnet motor. Preferably the electrical conductors are located in the channels on the outer perimeter of the rotor, the channels run parallel to the open outside the grooves, i.e. also to the axis of rotation of the rotor in the direction of the perimeter pass obliquely. Channels, which are electrical conductors, can be opened to the outer perimeter of the mouth of the RA, or can be made as closed channels in the inner part of the rotor.

The invention also concerns a method of manufacturing a rotor of a permanent magnet according to the preceding description. According to this method, the rotor is assembled from a large number of rotor plates of sheet iron, with a separate rotor laminations are stamped from sheet iron one after another in the sequence in which they are going. Preferably the stamping separate rotary plates of sheet iron should be one after the other from one of the steel strip. After each stroke of the punching tool for forming grooves on the outer perimeter of the rotor is turned by a certain angle around its longitudinal axis, which corresponds to the axis of rotation of the rotor. That is, each plate of sheet iron groove is offset by a given angle relative to previous plates of sheet iron in the direction of the perimeter. Then when the individual plates of sheet iron are stacked on each other, stamped by the offset sections of the groove get inclined relative to the longitudinal edges of the permanent magnets grooves on the outer perimeter of the rotor. For stamping at the same time in each rotary plate of sheet iron systembolagets one number of slots for permanent magnets. These notches preferably vyshtampovyvajut in each rotary plate of sheet iron in the same corner on the ogenyi, i.e. the tool for forming grooves is not overturned as a tool for forming grooves after each stroke of the stamping. Thus, permanent magnets after Assembly of the rotor plates of sheet iron can be inserted in the longitudinal direction of the rotor so that the permanent magnets are parallel to the longitudinal axis of the rotor. Permanent magnets preferably have a length, which in each case correspond to the length of the rotor in the direction of the rotation axis.

Further preferably, the rotor is assembled of at least two pre-manufactured rotary modules. The individual rotor modules, as previously described for the entire rotor, respectively, collected from a large number of rotor plates of sheet iron. Individual rotor laminations from sheet iron rotary module are stamped each other in the sequence in which they are going. The tool for forming grooves on the outer perimeter of the rotor after each stroke of the stamping is turned by a certain angle around its longitudinal axis. Thus, each plate of sheet iron rotary module around the perimeter are shifted relative to each side of the slots. When a single plate of sheet iron rotary module stacked on top of each other, through stamped in cardiotomy plate of sheet iron offset portions of the slots are formed is made on the outer perimeter of the rotor module sloping section of the groove. After Assembly of the rotor plates of sheet iron in a rotary module installed along the rotary module section of the permanent magnet. For sections of the permanent magnet in the rotor plates of sheet iron vyshtampovyvajut recesses, which are provided in each rotary plate of sheet iron in the same angular position, so that sections of the permanent magnet can be inserted into the rotary module parallel to the axis of rotation of the rotor.

Further preferably, if performance of rotors with different lengths are pre-manufactured rotary modules of a certain length. Pre-manufactured rotary modules can then be connected with each other preferably in different random combinations until the desired required to perform the lengths of the rotors. The individual rotor modules are pre-manufactured so that they are section of a permanent magnet, which lie parallel to the axis of rotation of the rotary module of its axial length. In addition, rotary modules are respectively on the outer perimeter section of the groove that is inclined to a radially outer longitudinal edge of the adjacent section of the permanent magnet, and the section of the permanent magnet can run, for example, in the direction of a chord of a circle or radially inner portion of the rotor is on the module. In accordance with the desired length of the rotor to each other connects different number of rotor modules in the longitudinal direction, and the section of the permanent magnet of the individual rotor modules are preferably in line with each other, so that the rotor permanent magnets are formed that pass through the entire length of the rotor parallel to the axis of rotation of the rotor. The section of the groove of the individual rotor modules in this case, as described above, preferably so attached to each other, which are formed continuous throughout the length of the rotor lying oblique grooves, which if necessary are zigzag. While the grooves preferably along the entire length of the rotor overlap the longitudinal edges of adjacent permanent magnets.

For example, there are at least two, preferably three, type rotary modules with different lengths of the modules. Then there are several, preferably three, are made different by the length of the rotary module can be arbitrarily combined with each other so that you can make depending on the needs resulting from the gradation of the length of the rotors.

Preferably, the gradation is selected so that the second type of rotor modules has a length of module, which about half is greater than the length of the module of the first type of rotor modules. While it is preferable that the same provides for a third type of rotary modules, which is the length of the module is equal to twice the length of the rotary module of the first type. Hence the gradation for various lengths of the rotors, which can be collected from these rotary modules, which corresponds to half the length of the module of the first type of rotor modules.

Hereinafter the invention is described with examples using the attached drawings.

Figure 1 - schematic perspective view of the rotor according to the first variant embodiment of the invention.

Figure 2 - schematic perspective view of the rotor according to the second variant embodiment of the invention.

Figure 3 is a perspective view of the rotor according to the third variant embodiment of the invention.

4 is a detailed view of the rotor according to Fig 3.

5 is a first rotary plate of the iron plates for the rotor according to Fig 3 and 4.

6 is a second rotary plate of the iron plates for the rotor according to Fig 3 and 4.

Fig.7 is a perspective view of a rotor according to an additional variant implementation.

Fig is a detailed view of the rotor according to Fig.7.

Fig.9 is a perspective view of a rotor according to an additional variant embodiment of the invention.

Figure 10 is a detailed view of the rotor according to Fig.9.

11 - rotary plate of the iron plates for the rotor according to the invention.

Fig - schematically the Assembly of the rotor according to the invention.

Fig - schematically the implementation of Otarov different lengths of pre-made rotary modules.

Shown in figure 1, the rotor is made of eight identical rotor segments 2, which, for example, can be manufactured as the parts from metal powder. The rotor segments 2 are made conical and are alternately rotated by 180° to each other, so always rotor element with a wide end side is lying between the narrow end sides of two adjacent rotor elements 2. The rotor segments 2 are respectively at a distance from each other, so that between the rotor segments 2 are formed which runs in the radial direction of the cavity, which are permanent magnets 4. The permanent magnets 4 are in the radial direction and thus in General are a star. While permanent magnets 4 are in the radial direction to the outer surface of the rotor. On the contrary, the cavity between the rotor segments 2 are made radially to the permanent magnets 4 as the grooves 6, which are open to the outer perimeter of the rotor. The grooves 6 are made so that they are on the outer surface have a constant width along the entire length of the rotor along the rotational axis X of the rotor 6. In addition, the grooves 6 are obliquely on the surface of the rotor so that they are inclined relative to the radially outer longitudinal edges 8 of the permanent magnets 4. The grooves 6 are, or turning on the list is Ali, on the surface of the rotor. Such oblique course of the grooves 6 is achieved by the conical execution of the rotor segments 2, i.e. the rotor segments 2 on one longitudinal end to have a cross section smaller than at the opposite longitudinal end.

In addition, the grooves 6 are made so that they are on the outer surface have a smaller width than lying radially closer to the center of the base of the groove, i.e. the region adjacent to the permanent magnets 4. This is achieved by stepwise extension of the groove on the longitudinal end of the rotor segments 2. When conical execution of the rotor segments 2 step extension 10 is performed respectively on the longitudinal end of the rotary segment 2 with greater surface cross-section. A stepped extension 10 is terminated by a narrowing of the rotor segments 2 to the opposite longitudinal end, so that the opposite end 2 no longer has a stepped extension 10. Due to the fact that the rotor segments 2 are alternately rotated by 180°, and in the course of each groove 6 is achieved that a stepped extension 10 along the groove alternates from one side of the groove to the other side of the groove, respectively, the inclined course of the grooves 6.

Through the described embodiment implementation is achieved that the entire length of the rotor in the direction of the axis of rotation X of the radially outer the longitudinal edges 8 or radially outwardly directed end surface of the permanent magnets 4 overlap the slots 6, so the cavity grooves adjacent to the permanent magnets 4 form a magnetic insulation, which prevents a magnetic short circuit between the North and South poles of the magnets in the inner part, i.e. through the rotary segment 2. This ensures that the magnetic flux through the stator of the motor (not shown here) and with this higher efficiency. On the outer surface of the grooves is made narrower, so that here the magnetic flux as possible a little interrupted by the grooves, and thus it is possible to achieve as uniform as possible, the nature of the change of torque.

As shown in figure 1 the rotor by means of tapered execution of the rotor segments 2 notches 6 on the outer perimeter of the rotor alternately tilted in the opposite direction along the perimeter of the rotor, the rotor shown in figure 2, are made so that all the grooves 6 on the move from one end side of the rotor to the opposite end side of the rotor are inclined in the same direction of the perimeter. Also as in figure 1, the grooves are straight and inclined at an angle to the longitudinal edges 8 of the adjacent permanent magnets 4. The location of the permanent magnets 4 between the rotor segments 2 corresponds to the position of figure 1. In the embodiment according to figure 2, all of the rotor segments 2 the imp who are satisfied identically, as parts from metal powder. Unlike the implementation according to Fig 1 of the rotor segments 2 but they are all in the same direction, so formed are equally inclined grooves 6 between the rotor segments 2. Also in this embodiment, the grooves 6 have a stepped expansion in facing the permanent magnets 4 fields.

Each step of the extension 10 in the rotor segments 2 are made on the end side of the rotary segment 2, respectively, on the longitudinal edge of the rotor segment 2. Along the longitudinal edges to the opposite end side of the extension 10 is reduced, so that there on the longitudinal edge is not completed no extension. On the contrary, the opposite edge of the rotor segment 2 is made so that the extension 10 along the longitudinal edges increases, so that the longitudinal edge of the rotor segment on the first side is no extension is not performed, and on the opposite side made the extension 10. Thus, the rotor segments on both end sides are made identical, so that they are made symmetrically with respect to the mid-point of the rotor segments 2, and the rotor segments 2, therefore, arbitrarily rotated through 180° can be collected. Also with this arrangement, by performing small PA is s on the outer perimeter is secured, there the magnetic flux to the stator possibly less disturbed, while performing a wide grooves on the radially outer end surfaces of the permanent magnets 4 creates preconditions in order to provide sufficient magnetic insulation. The grooves 6 overlap along the entire length of the rotor in the radial direction of the longitudinal edges 8 or radially outer end surface of the permanent magnets 4.

Figure 3 shows a rotor which consists of a large number of rotor plates of sheet iron, which are superimposed on each other in the direction of the rotation axis X of the rotor. In the rotary plates of sheet iron 12 is respectively four slots 14, which are in the direction of a chord of a circle, i.e. normal to the radius of the rotary plate of sheet iron. The slots 14 are provided in each rotary plate of sheet metal 12 in the same angular position about the rotation axis X, so that the slots 14 when stacked on top of each of the rotary plates of iron sheet 12 to form grooves running in the longitudinal direction through the rotor, which can be inserted permanent magnets so that they run parallel to the axis of rotation X.

In the area of end edges 16 of the slots 14, i.e. radially outside lying longitudinal edges 16 of the grooves formed by the slits 14, on the outer peri is the center of the rotor is made grooves 18, which correspond to the functions of the slots described using figure 1 and 2. In the embodiment according to figure 3, the grooves are V-shaped or zigzag, so they double-cross the region of the longitudinal edges 16 of the slots 14 along the length of the rotor. As is clearly seen in the increase in figure 4, the grooves 18 with cross-section of dovetail". This means that the grooves 18 are in the area of the hole to the outer perimeter of the rotor in the direction of the perimeter of the small width of the groove, so that the outer surface is directed only a thin slit. Coming from the slit 20 of the groove 18 extends radially inward, so that it is at the base of the groove, i.e. the area facing the longitudinal edges 16 of the slot 14 has a substantially larger width of the groove in the direction of the perimeter. This width of the groove and at the bottom of the groove, consistent with the function of the extension 10 in the embodiment according to figure 1, consistent with the slope angle α of the groove relative to the longitudinal direction of the rotor or edges 16. The width of the groove and is selected so that when the inclination of the groove at the angle α over the entire length of the groove in a direction parallel to the axis of rotation X, the longitudinal edges 16 of the slots 14 in the radial direction was blocked by a groove or base of the groove. That is, at one end of the groove the groove is adjacent the peripheral side edge of the base of the groove to the edge 16. On the opposite end the groove in the direction of the axis of rotation X of the groove adjacent the opposite in the direction of the perimeter of the end of the base of the groove to the edges 16 of the slots 14. Shown in figure 3 the rotor in the middle of the longitudinal direction of the rotor shows a case when the angle changes, and the groove goes back under the opposite angle, so that both face ends of the groove are placed equally relative to the adjacent edges 16 of the slots 14.

Figure 4 also shows that in each of the second rotary plate of sheet metal 12, the groove 18 is connected directly with the adjacent slots 14 through the corresponding cavity 22. This cavity 22 leads to the fact that the rotary plate of sheet metal, in which the cavity 22, the parts of the rotary plates of sheet iron on both poles inserted into the slot 14 of the permanent magnet is not connected through a rotary plate of sheet iron. Thus, through cavities 22 generates a magnetic isolation, which prevents a magnetic short circuit in the inner part of the rotor. In each of the second rotary plate of sheet iron from the cavity 22 refused. This serves to leave the jumper, which holds together the individual parts of the rotor.

Figure 5 and 6 shows two different rotary plate of the iron plates for the rotor described with reference to Fig. 3 and 4. When consideration is shown in figure 5 and 6 rotary plates of sheet iron 12 we are talking about the two rotary plates of sheet metal, in which the rotor of nazyvautsa lying directly on top of each other. In the center of the rotary plate of sheet iron made a round hole 24, which serves to accommodate a rotary shaft. In Fig. 5 and 6 shows how the grooves 18 overlapping the edges 16 of the slots 14 in the radial direction. In addition, it is noticeable that, respectively, to two of the grooves 18 is attached to the cavity 22, which connects the grooves 18 directly with the adjacent slots 14. In the other two slots 18 there is no such cavity to prevent the collapse of the rotary plate of sheet iron. In the shown figure 6 rotary plate of sheet iron cavity 22 is made respectively in the other two slots 18, in which a rotary plate of sheet iron 12 according to figure 5, the cavity 22 is not provided. Thus, the cavity is made with alternating accordingly, in one groove of one of the rotary plates of sheet iron, in the next plate of sheet iron cavity is not performed, and in the next plate of sheet iron cavity executed again, and so on, the Offset of the slots 18 in the direction of the perimeter between the two plates of sheet iron of Fig. 5 and 6, due to the small corner to the right on top of each other lying rotary plates of sheet iron is not visible.

Figure 5 also schematically indicated by an implementation option of the rotor for use in an electric motor with an immediate start. To do this, note the drop in the rotor near the outer perimeter can be performed more channels 23, which are evenly distributed around the perimeter of the rotor between the slots 18. Figure 5 channels 23 depicts only between the two grooves 18, it is understood that the channels 23 are respectively distributed over the entire surface of the rotor. The channels 23 are preferably parallel to the grooves 18 and contain electrical conductors. In addition, the channels 23 are preferably filled with copper. This is the location of the electrical conductors makes possible the operation of the engine when you start to type asynchronous motor, and after starting the engine the engine then operates as a motor with permanent magnets. Assumes that additional channels 23 can be located at the discretion of, i.e. also in the rotor, the rotor plates of sheet iron which is shown in figure 5 and 6.

Instead the location of the cavities 22 with alternating, as they were described by using Fig. 3 and 4, it is also possible for several rotary plates of sheet iron with 12 cavities 22 in the same groove 18 to be stacked on each other, as shown in Fig. 7 and 8. It is shown in Fig. 7, the rotor corresponds essentially to the rotor described based on Fig. 3-6, with the only difference that here the cavity 22 in the direction of the rotation axis X is made longer, because several rotary plates of sheet iron with 12 cavities 22 layered on each other at the same samog the groove and only then attached several rotary plates of sheet metal 12, that this slot does not have a cavity 22. Thus, the cavity 22 in the direction of the rotation axis X to form a longer breaks between adjacent slots 14 and the groove 18, which respectively divide longer in the direction of the rotation axis X of the connecting crosspieces 26.

Additional variant implementation, which is based on the embodiment described by using Fig. 3-8, as shown in Fig. 9 and 10. Also in this rotor talking about the rotor, which consists of a large number of rotor plates of sheet iron 12. In these rotary plates of sheet iron made the slits 14 and the grooves 18, as described above using Fig. 3-8. In contrast to the above rotors in the rotor according to Fig. 9 and 10 are not met cavity 22 lying in the direction of the perimeter of the ends of the slots, but in the middle of the grooves 18 in the radial elongation of the gap 20 in the longitudinal direction of the grooves 18 is made a notch 28, which to a certain extent penetrates radially inward in the rotor plate of sheet iron, partially in contact with the slot 14 and thus forms a connection between the slot 14 and the groove 18. The contact slot 14 with the groove 18 is essentially in the area, which lies in the middle of the groove, i.e. the area in the radial elongation of the gap 20 on the same radial line as the edge 16 of the slot 14. The notch 28 has an assignment to separate magnetic mater what al rotary plate of sheet metal 12 on the front side, i.e. in the region of the edges 16, the slot 14 to prevent or reduce the magnetic flux between the radially oppositely lying poles of the magnets in the inner part of the rotor.

Figure 11 shows a rotary plate of the iron plates for the rotor, a similar plate on figures 9 and 10 in the top view. In such a rotary plate of sheet iron 12 in addition to the notch 28 is made even more directed radially inward of the notches 30 on the oppositely lying in the direction of the longitudinal perimeter edges of the slots 18. This results in even greater cuts in the soft magnetic material to interrupt the magnetic flux or short circuit in the inner part of the rotor between inserted in the slots 14 of the permanent magnets. In addition, as seen in figure 11, the notch 28 is in contact only one of the two adjacent grooves of the slots 14. Thus, it is ensured that between areas of the rotor plates of sheet iron 12 remain jumper to the rotary plate of sheet iron, and with it the finished rotor was maintained intact.

With the help of Fig. 12 and 13, the following describes the modular Assembly of the rotor according to the invention. The idea of modular rotor assemblies is that the individual rotor modules 32 are pre-manufactured and then pre-manufactured rotary modules 32 are collected in Ely rotor with a rotor shaft 34. This gives you the opportunity to just build up the desired length of the rotor different amounts of pre-manufactured rotary modules 32. In addition, as described using Fig, can also pre-manufactured rotary modules 32 of different lengths, which can then be connected in a desired combination to perform the desired length of the rotor.

In Fig. 12 shows how going rotary module 32. Each rotary module 32 consists of a large number at each other layered rotor plates of sheet iron 12. In the example shown in Fig. 12, the rotary plates of sheet iron 12 is radially directed slots 14 for permanent magnets or sections of the permanent magnets 36. That is described here, the rotor permanent magnets 36 are star-shaped in the radial direction. Alternatively described, the modular Assembly can also be obtained at the location of the slots 14, which corresponds to the arrangement described in Fig. 3-10. In addition, the modular Assembly may also be implemented with the rotor segments 2, as they were described by using Fig. 1 and 2, and the rotor segments 2 are made along the length of the rotary module 32 in the direction of the axis of rotation X.

In addition, the rotary module and, accordingly, in the example shown in the rotary plates of sheet iron 1, the grooves 18 are made as described previously. While the grooves 18 are obliquely or inclined in the direction of the perimeter, and they overlap the radial outer edges of the slot 14 along the entire length of the rotary module 32 in the direction of the axis X. the width of the groove and the angle α, as previously described, agreed with each other that the notch on one end side of the rotary module 32 peripheral end directly overlaps the radial end side of the slot 14, and at the other end end of the rotary module 32 in the opposite direction of the perimeter of the end covers directly the side end of the slot 14. Thus, the rotary module 32 corresponds to the half shown in Fig. 3, 7 and 9 of the rotor in the direction of the axis of rotation X. In each other layered rotor plates of sheet metal 12 in the longitudinal direction of the inserted section of the permanent magnets 36. Then the stack of plates of sheet iron on both end sides of the stipulated protective disks to form a rotary module 32. If necessary, the protective disks can also be abandoned. In the shown Fig example, a rotary shaft mounted three pre-made so the rotary module 32 to perform the rotor length three rotary module 32. When this rotary modules 32 relative to each other are arranged so that the sections of the permanent magnet 36 separate R is Torno modules 32 are located to each other on the same line, i.e. like a solid permanent magnets lie along the entire length of the rotor parallel to the axis of rotation X. using Fig. 13 describes the Assembly of the rotors of different lengths of pre-made rotary modules 32A, 32b, 32c of different lengths, and a separate rotary modules 32 are assembled as explained using Fig. To simplify on Fig grooves 18 are marked by their middle lines. In addition, also schematically shows a longitudinal edges of the slots 14 or permanent magnets or permanent magnets section 36. Each rotor is depicted only one longitudinal edge 16 and a single groove 18. Assume that each rotor along its perimeter has several distributed permanent magnets and owned longitudinal edges 16 and grooves 18.

As shown above in Fig. 13, there are three rotary module 32A, 32b, 32c of different lengths, which can be collected from a large number of rotor plates of iron sheet 12 or the rotor segments 2, as explained using Fig. 1 and 2. In the example shown, the length have such gradation that rotary module 32b half as long rotary module 32A in the direction of the rotation axis X. the Rotor module 32C has doubled the length of the rotary module 32A in this direction. In rotary module 32A grooves 18 are on the outer perimeter with an inclination in one direction only. In a rotary fashion is known 32b and 32C grooves run zigzag, as explained by using Fig. 3-11. The grooves 18 in the three rotary modules 32A, 32b and 32c of different lengths inclined at different angles to the longitudinal axis of the rotor, so that the distance between the longitudinal edge 16 and the groove 18 on the front side of the rotor modules 32A, 32b and 32c in the direction of the perimeter equally in all three rotary modules made with a different length. This gives you the opportunity to rotary modules 32A, 32b and 32c can be connected to each other in arbitrary combinations in the longitudinal direction, and the sections of the slots or grooves 18 of the individual rotor modules 32A, 32b, 32c on the joints touch or are connected to each other, so that in the finished rotor to form a continuous, if necessary zigzag groove 18. When are connected with each other several rotary modules 32A, in which the grooves or sections of the slots 18 in the rotary module are not directly zigzag that is not possible, then the slots are all tilted in the same direction, as shown in Fig.

As shown in Fig, from rotary modules 32A, 32b and 32c to collect the rotors of different lengths, and the gradation of the lengths of the runs of the rotor corresponds to half the length of the rotary module 32A in the direction of the rotation axis X. As explained in eight examples of different combinations of rotor modules 32A, 32b and 32c, the grooves 18 of the individual rotor modules 32A, 32b, 32c always connect the die to each other, so that the entire length of the rotor to perform a continuous zig-zag grooves 18, which are all run under the same given angle of rotation of the rotor. Regarding the gradation of the lengths of the rotors of the short rotor can be performed by only one rotor module 32A. Following a longer rotor is formed by only one rotor module 32b. The rotor, which has doubled the length of the shortest, can be performed by only one rotor module 32C. Another rotor, longer half-rotary module 32A may be accomplished through a combination of rotary module 32A and the rotary module 32b. As the length of the rotor is accomplished through a combination of rotary module 32C and the rotary module 32A. Accordingly, the gradation goes on until the longest in the example shown according Fig rotor, which is made of a rotary module 32C, two rotary modules 32b and the rotary module 32A. Needless to say, with the help of the system can be made even more long rotors.

The advantage of this modular method of Assembly of the rotor is that it does not need to produce permanent magnets of different lengths, moreover, the principle designer of ready-made rotary modules can be arbitrarily set with each other, so that t is Kim were used sparingly and simply run the rotors of different lengths.

The list of reference positions

2 - Rotor segments

4 - Permanent magnets

6 - Grooves

8 is a Longitudinal edges

10 - Extension

12 - Rotary plates of sheet iron

14 - Slots

16 - Edges or longitudinal edges

18 - Slots

20 - the Gap (clearance)

22 - Cavity

23 - Channel

24 - Hole

26 - connecting jumper

28 - Incision

30 - Incision

32 - Rotary module

34 Rotary shaft

36 - Section of the permanent magnet

38 - Protective disk

X - Axis rotation

a Width of the groove

b - Distance

α - Angle

1. The rotor permanent magnet motor, in which permanent magnets (4; 36) in the inner part of the rotor parallel to the axis (X) of rotation of the rotor in the region of the radially outer longitudinal edges (8; 16) permanent magnets (4; 36) on the outer surface of the rotor is made open to the outside grooves (6; 18), which, respectively, are inclined or curved toward the longitudinal edges (8; 16) adjacent permanent magnets (4; 36) in the direction of the surface, characterized in that the middle line of each groove (6; 18)at least once crosses the longitudinal edge (8; 16) adjacent the permanent magnet (4; 36)with the slots (6; 18) on the outer side of the rotor in the direction of the surface have a smaller width than lying radially closer to the center region of the groove (6; 18), being the m and the cross-sectional shape of the groove (6; 18) along the length of the rotor is constant.

2. The rotor according to claim 1, characterized in that it comprises at least two connected with each other in the longitudinal direction (X) are pre-manufactured rotary modules (32), and in each of the modules rotor section of permanent magnets (36), and each of the rotor modules (32) has on its outer surface section of the slots (6; 18), and bonded together by a rotary modules (32) section of the grooves of the individual rotor modules together form the slots (6; 18) of the rotor, and permanent magnets section (36) the individual rotor modules (32) together form the permanent magnets (4) of the rotor.

3. The rotor according to claim 2, characterized in that section of the slots (6; 18) each rotor module (32) is inclined to the longitudinal edges (8; 16) adjacent sections of permanent magnets (36) in such a way that on each side of the rotor module (32) average line sections of grooves in the direction of the perimeter respectively have the same given distance from the longitudinal edges of the sections of the permanent magnets.

4. The rotor according to claim 2 or 3, characterized in that the middle line of each section of the groove (6; 18) crosses the longitudinal edge (8; 16) adjacent sections of the permanent magnet (36)at least once.

5. The rotor according to claim 2, characterized in that it contains at least two rotary module (32), which in the direction of the rotation axis (X) of the rotor have different lengths.

6. The rotor according to claim 2, characterized in that at least one of the rotor modules (32) has a section of the groove (6; 18), which are respectively executed inclined so that the average line sections of the groove (6; 18) on both opposite end faces of the rotor module (32) in the direction of the surface, also directed in the same direction are equally far removed from the longitudinal edges (8; 16) permanent magnets (4; 36).

7. The rotor according to claim 1, characterized in that the slots (6; 18) and/or section of the groove (6; 18) are, for example, zig-zag to the longitudinal edges (8; 16) adjacent permanent magnets (4) or sections of a permanent magnet (36).

8. The rotor according to claim 1, characterized in that the slots (6; 18) respectively designed in such a way that they essentially overlap, respectively, along the length (X) of the rotor, at least the longitudinal edges (8; 16) adjacent permanent magnets (4; 36) in the radial direction.

9. The rotor according to claim 1, characterized in that the slots (6; 18) are arranged in such a way that, accordingly, the groove (6; 18) overlaps the radially outer longitudinal edges (8; 16) of two adjacent permanent magnets (4; 36) in the radial direction.

10. The rotor according to claim 1, characterized in that the grooves have a cross-section of dovetail".

11. The rotor according to claim 1, characterized in that near the longitudinal edges (8; 16) permanent magnets (4; 36) in the surrounding material, R is the Torah made cavity (22; 28), which preferably is connected with the adjacent groove.

12. The rotor according to claim 11, characterized in that the rotor is made of a large number nakaweesi each other rotary plates (12) of sheet iron, with a cavity (22; 28) is executed only in part of the rotary plates of sheet metal and are preferably between two adjacent permanent magnets (4; 36).

13. The rotor according to claim 1, characterized in that the rotor or the individual rotor modules (32) made of a large number of rotary plates (12) of sheet iron or composed of massive preferably sintered segments (2), and between adjacent with each other by segments (2) are fulfilled receiving cavity for permanent magnets (4).

14. The rotor according to claim 1, characterized in that, at least in part the slots (6; 18) or additional channels (23)made in the rotor, are electrical conductors.

15. A method of manufacturing a rotor of a permanent magnet according to one of claims 1 to 14, in which the rotor is assembled from a large number of rotary plates (12) of sheet iron, and a rotary plate (12) of sheet metal punched each other in the sequence in which they are going, and tool for forming grooves (18) on the outer surface of the rotor after each stroke of the stamping is turned by a certain angle around its longitudinal axis (), to perform inclined relative to the longitudinal edges (16) of permanent magnets (4; 36) of the grooves (18) on the outer surface of the rotor, while the middle line of each groove (6; 18), at least once crosses the longitudinal edge (8; 16) adjacent the permanent magnet (4; 36), and
after Assembly of the rotary plates (12) of sheet iron in the rotor it is inserted permanent magnets (4; 36)passing through the length of the rotor.

16. The method according to item 15, in which the rotor collect at least two pre-manufactured rotary modules (32),
and rotary modules (32), respectively, collected from a large number of rotor plates (12) of sheet iron, and
separate rotary plate (12) of sheet iron rotor module (32) punched each other in the sequence in which they are going, and tool for forming grooves (18) on the outer surface of the rotor after each stroke of the stamping is turned by a certain angle around its longitudinal axis, to perform inclined relative to the longitudinal edges (16) of permanent magnets (4; 36) of the grooves (18) on the outer surface of the rotor, and
after Assembly of the rotary plates (12) of sheet iron in the rotor module (32) in a set along the rotary module (32) section of the permanent magnet (36).

17. The method according to clause 16, in which to perform rotors with different lengths of pre is sustained fashion made rotary modules of a certain length, which are sections of the permanent magnet (36), and which are parallel to the axis (X) of rotation of the rotor module (32) along its axial length, and rotary modules (32) and are respectively on the outer perimeter section of the groove (18), which is inclined to a radially outer longitudinal edge (16) of adjacent sections of the permanent magnet (36), in accordance with the desired length of the rotor to each other connect a different number of rotor modules (32) in the longitudinal direction (X), so that sections of the permanent magnet (36) of the individual rotor modules (32) form a permanent magnet (4), which passes axially through the rotor.

18. The method according to 17, in which is provided, at least two, preferably three, the type of rotor modules (32) with different lengths of the modules.

19. The method according to p, in which the second type of rotor modules (32b) is the length of the module, which is half more than the length of the module of the first type of rotor modules (32A), and preferably there is a third type of rotor modules (32C), which is the length of the module is equal to twice the length of the module of the first type of rotor modules.



 

Same patents:

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
The invention relates to electrical engineering and can be used in the electrical industry

The invention relates to the field of instrumentation and electrical engineering and can be used in the manufacture of high-speed rotors of electrical machines

The invention relates to electrical engineering, namely technology high-speed electrical machines with permanent magnets, and can also be used when building other rotating structures

FIELD: electricity.

SUBSTANCE: according to the invention, the electrical rotation machine contains the first section of stator core, which is, essentially, of round shape and includes a number of teeth. The second section of stator core, which is also of round shape and includes a number of teeth and winding located between the first and second round sections of stator core, and rotor including a number of permanent magnets. The first section of stator core and the second section of stator core, winding and rotor are situated on the common geometrical axis. In addition, the set of teeth of the first stator core section and the second stator core section are projected in rotor direction. Besides teeth of the second stator core section are shifted in circular direction, while the permanent magnets in rotor are separated from each other in circular direction with regard to teeth of the first stator core section by pole section coming in axial direction. The poles are made from soft magnetic material. In essence, the direction of permanent magnet magnetisation is circular to direct magnet flow generated in axial pole section in circular direction and partially in axial direction when electrical machine is used with the purpose to concentrate magnet flow from the front area of adjacent permanent magnets to tooth position of the first stator core section.

EFFECT: improved working characteristics and increased efficiency factor of electrical machine.

14 cl, 19 dwg

FIELD: electricity.

SUBSTANCE: according to the invention, the electrical rotation machine contains the first section of stator core, which is, essentially, of round shape and includes a number of teeth. The second section of stator core, which is also of round shape and includes a number of teeth and winding located between the first and second round sections of stator core, and rotor including a number of permanent magnets. The first section of stator core and the second section of stator core, winding and rotor are situated on the common geometrical axis. In addition, the set of teeth of the first stator core section and the second stator core section are projected in rotor direction. Besides teeth of the second stator core section are shifted in circular direction, while the permanent magnets in rotor are separated from each other in circular direction with regard to teeth of the first stator core section by pole section coming in axial direction. The poles are made from soft magnetic material. In essence, the direction of permanent magnet magnetisation is circular to direct magnet flow generated in axial pole section in circular direction and partially in axial direction when electrical machine is used with the purpose to concentrate magnet flow from the front area of adjacent permanent magnets to tooth position of the first stator core section.

EFFECT: improved working characteristics and increased efficiency factor of electrical machine.

14 cl, 19 dwg

FIELD: electricity.

SUBSTANCE: linear asynchronous motor comprises inductor made of core with three-phase winding. Secondary element comprises core, in slots of which there are insulated electroconductive rods arranged one over the other as closed at one side by a common electroconductive bus, and at the other side - by closing cylinder made of electroconductive and insulating parts, installed with the possibility of rotation around its horizontal axis. Secondary element comprises additional electroconductive rods arranged at both sides of electroconductive rods arranged in central part of secondary element and arranged at the angle to it. Secondary element is equipped with additional cores arranged along both sides from core, in slots of which there are central parts of electroconductive rods installed. Additional electroconductive rods arranged in slots of core arranged to the left of the main one are closed at the left side by additional electroconductive bus, and at the right side - by the same electroconductive bus, which closes rods arranged in central part of secondary element, and additional electroconductive rods arranged in slots of core arranged to the right of the main one, are closed at the right by another additional bus, and to the left - by electroconductive part of closing cylinder.

EFFECT: improved efficiency of linear asynchronous motor.

4 dwg

FIELD: electricity.

SUBSTANCE: proposed axial contactless direct current generator contains a housing, a subexciter, an exciter and the main generator. The permanent magnets of the subexciter inductor and the magnetic conductors in the grooves whereof the windings of the subexciter, the exciter and the main generator are laid are designed to be axial. The side axial magnetic conductors are rigidly mounted inside the housing while the permanent magnets of the subexciter inductor and the inner axial magnetic conductor are rigidly mounted on a shaft so that to be capable of rotation relative to the side axial magnetic conductors. The permanent magnets of the subexciter inductor are mounted on the butt-end of one side axial magnetic conductor while the inner axial magnetic conductor is mounted between the side axial magnetic conductors. The inner axial magnetic conductor and the side axial magnetic conductor on the butt-end whereof the permanent magnets of the subexciter inductor are mounted have two active but-end surfaces with grooves while the other side axial magnetic conductor has one active but-end surface with grooves. Laid in the grooves of the side axial magnetic conductor with two active but-end surfaces on the side of the permanent magnets of the subexciter inductor is a single-phase exciter excitation winding connected to the subexciter operational winding via a multi-phase double half-period rectifier. Laid in the grooves of the inner axial magnetic conductor on the side of the exciter excitation winding is a multi-phase exciter operational winding while on the other side a single-phase main generator excitation winding is laid connected to the exciter operational winding via the multi-phase double half-period rectifier. Laid in the grooves of the side axial magnetic conductor with a single active but-end surface is a multi-phase main generator excitation winding connected to the multi-phase rectifier.

EFFECT: generator manufacture technology simplification and generated voltage quality improvement.

2 dwg

FIELD: engines and pumps.

SUBSTANCE: proposed induction motor comprises inductor 1 consisting of core 2 with three-phase winding 3. Secondary element 4 comprises core 5 with slots wherein isolated conducting rods 6 are laid connected with common bus 7 on one side and, on opposite side, with movable closing element 8 including conducting and isolating parts adjoining toothed rack 6 engaged with gear wheel 10. Conducting part of movable closing element 8 comprises rectangular base whereon alternating stepped sections are arranged, step height of said sections being equal to that of secondary element slot.

EFFECT: control over mechanical force, rpm and power output of induction motor.

5 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: proposed electric machine comprises stator pack and rotor in single vessel, which has inner cooling circuit made of rotor cooling channels passing through rotor in axial direction and arranged on two concentric circles, and this circuit is designed to circulate gaseous cooling substance, at the same time in machine on the first end side of rotor there are fan blades provided, as well as the first facility for direction of cooling substance from channels of rotor cooling on one of both concentric circles through front part of winding to channels of rotor cooling on another of both concentric circles, therefore, optimal cooling is provided for zones, in which losses heat removal is difficult.

EFFECT: improved cooling action of electric machine without using fan impeller separately installed on rotor.

35 cl, 2 dwg

FIELD: electricity.

SUBSTANCE: proposed linear asynchronous motor includes inductor consisting of core with three-phase winding. Secondary element includes the core in the slots of which there located one by one are insulated electrically conducting pins closed on both sides on edges with locking cylinders each of which includes three segments in each cross section. Two segments include alternating electrically conducting and insulating sections, and the third segment is fully electrically conducting.

EFFECT: enlarging functional capabilities and control range of linear asynchronous motors.

5 dwg

FIELD: electricity.

SUBSTANCE: electric machine includes circular row of magnetic poles (1) and circular row of electromagnets (3) the magnet conducting elements (4) of which have central pole part (18) and two side pole parts (19, 20) related to it and placed from opposite laying sides of central pole part in the direction actually perpendicular to rotation axis. Winding (5) is arranged on central pole part (18). Part of winding 5 located between pole parts of magnet conducting element is more, as to length, than the half length of the whole winding. Central pole part (18) can be provided at least with one groove. Distance between centres of neighbouring pole surfaces is preset so that the angle value between pole surfaces can be within 0.7 of the angle value between magnetic poles to 1.3 of the angle value between magnetic poles. Angular size value of pole surface of side pole part has been set depending on angular size of pole surface of central pole part and has been chosen from the range of 0.55 of angular size of pole surface of central pole part to 0.95 of angular size of pole surface of central pole part.

EFFECT: improving technical characteristics by increasing the value of torque moment and power of electric machine at simultaneous decrease of mass and losses in its windings.

33 cl, 16 dwg

FIELD: electricity.

SUBSTANCE: asynchronous motor with hollow short-circuit rotor includes hollow rotor and external stator with core and winding, as well as additional rotor installed on the shaft in the zone restricted with stator with possibility of rotation irrespective of hollow rotor, made from ring-shaped magnet radially magnetised with the number of pairs of poles, which is equal to the number of pairs of poles of stator winding, on which there pressed is thin-wall sleeve from conducting material, and hollow rotor is made in the form of thin-wall shell from conducting material.

EFFECT: increasing power coefficient and efficiency of asynchronous motor with hollow rotor without deterioration of its dynamic characteristics.

3 cl, 2 dwg

FIELD: electrical engineering; mechanical design of commutatorless magnetoelectric machines.

SUBSTANCE: rotor magnetic system has more than two magnetically permeable steel laminations with pole horns formed by prismatic tangentially magnetized N-S permanent magnets placed inside laminated stack; inner and outer diameters of laminations are uninterrupted and rectangular prismatic magnets are installed inside them so that distance over outer arc between external planes of two adjacent magnets of unlike-polarity poles is shorter than that over internal arc between same planes; magnets do not contact one another and have at least one projection on inner diameter for coupling with rotor shaft.

EFFECT: enhanced manufacturability.

3 cl, 2 dwg

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