CN210431049U - Magnetic pole module, rotor and motor - Google Patents
Magnetic pole module, rotor and motor Download PDFInfo
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- CN210431049U CN210431049U CN201921742842.9U CN201921742842U CN210431049U CN 210431049 U CN210431049 U CN 210431049U CN 201921742842 U CN201921742842 U CN 201921742842U CN 210431049 U CN210431049 U CN 210431049U
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Abstract
The embodiment of the application provides a magnetic pole module, a rotor and a motor. The magnetic pole module comprises a plurality of permanent magnet blocks, wherein the permanent magnet blocks are arranged in a row in a manner of being attached to each other two by two to form a permanent magnet block group; the end surfaces of the two sides of the permanent magnet block group in the width direction are arc-shaped along the length direction of the permanent magnet block group, and the difference between the maximum width and the minimum width of the permanent magnet block group in the width direction is a preset value. The application provides a magnetic pole module includes the permanent magnet piece group that the polylith permanent magnet arranged, and the terminal surface of this permanent magnet piece group width direction both sides is the arc along permanent magnet piece group length direction, has the form of circular arc transition, can make the motor including magnetic pole module reduce the cogging torque, realizes reducing motor system's vibration and noise, improves motor system control accuracy's purpose.
Description
Technical Field
The application relates to the field of electrical equipment, in particular to a magnetic pole module, a rotor and a motor.
Background
Wind energy is a clean renewable energy source, wind power generation is a relatively conventional wind energy utilization technology, a permanent magnet synchronous wind generating set is directly driven, a wind wheel directly drives a generator, and mechanical energy is converted into electric energy. The rotor of the generator adopts a permanent magnet as an excitation system, and when the rotor rotates, the stator winding cuts magnetic lines of force to generate induced electromotive force. The permanent magnet generator has the advantages of high torque density, high power generation efficiency, friendly power grid access, long service life and the like, and is the main development direction of the wind generating set. In addition, the permanent magnet generator does not need additional excitation equipment, and is favorable for improving the generating capacity and the operation reliability of the generator, so that the permanent magnet generator is widely applied to the fields of electric automobiles, spaceflight and the like.
However, in the composition structure of the permanent magnet motor, there is an interaction between the permanent magnet and the slotted armature, mainly the interaction between the magnetic field generated by the permanent magnet and the armature slot causes the change of the air gap permeance between the stator and the rotor to generate torque, which causes the change of the magnetic field energy inside the generator to form the slot torque, and the slot torque easily causes the vibration of the motor system and generates noise, and also has an adverse effect on the control accuracy of the motor system.
SUMMERY OF THE UTILITY MODEL
The utility model provides a shortcoming to current mode provides a magnetic pole module, rotor and motor for solve the inside magnetic field energy change of motor that prior art exists and form cogging torque, and arouse the technical problem of motor system vibration and noise.
In a first aspect, an embodiment of the present application provides a magnetic pole module, including a plurality of permanent magnet blocks, where the permanent magnet blocks are arranged in a row in a manner of being attached to each other two by two to form a permanent magnet block group; the end surfaces of the two sides of the permanent magnet block group in the width direction are arc-shaped along the length direction of the permanent magnet block group, and the difference between the maximum width and the minimum width of the permanent magnet block group in the width direction is a preset value.
In one embodiment, the permanent magnet block group has a trapezoidal cross-sectional shape in the width direction.
In one embodiment, the permanent magnet block groups are symmetrical about a center plane in the length direction.
In one embodiment, the permanent magnet block groups are symmetrical about a center plane in the width direction; the width of the permanent magnet block group is gradually increased from two ends to the middle along the axial direction; the pole arc coefficient of the permanent magnet block group is 0.8-0.85.
In one embodiment, the variation of the width of the permanent magnet block group in the axial direction is a continuously varying curve.
In one embodiment, the plurality of permanent magnet segments are the same length in the axial direction and the same thickness in the radial direction.
In a second aspect, the present application provides a rotor comprising a yoke and a pole module as provided in the first aspect of the present application;
a plurality of pressing strips are uniformly arranged on the magnetic pole mounting surface of the magnetic yoke along the circumferential direction of the magnetic yoke, and a magnetic pole module is clamped between the two pressing strips; the length direction of the magnetic pole module and the central axis of the magnetic yoke form a preset included angle.
In one embodiment, the pressing strips are abutted against the end faces of the two sides of the width direction of the permanent magnet block group of the magnetic pole module.
In one embodiment, the pressing strip is provided with a convex part, and the end surfaces of the two sides of the permanent magnet block group in the width direction are provided with grooves matched with the convex part.
In one embodiment, the predetermined included angle is 13 ° to 17 °.
In a third aspect, the present application provides an electrical machine comprising a stator and a rotor as provided in the second aspect of the present application.
In one embodiment, the pitch of the stator is equal to the predetermined value.
The technical scheme provided by the embodiment of the application has the following beneficial technical effects:
the application provides a magnetic pole module includes the permanent magnet piece group that the polylith permanent magnet arranged, and the terminal surface of this permanent magnet piece group width direction both sides is the arc along permanent magnet piece group length direction, has the form of circular arc transition, can make the motor including magnetic pole module reduce the cogging torque, realizes reducing motor system's vibration and noise, improves motor system control accuracy's purpose.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic perspective view of a permanent magnet block group in a magnetic pole module according to an embodiment of the present disclosure;
fig. 2 is a front view of a permanent magnet block set provided in an embodiment of the present application;
fig. 3 is a schematic cross-sectional view of a permanent magnet block set according to an embodiment of the present application;
fig. 4 is a schematic cross-sectional shape diagram of another permanent magnet block set provided in the embodiments of the present application;
FIG. 5 is a schematic plan view of a rotor according to an embodiment of the present disclosure in an expanded state;
fig. 6 is a schematic plan view of a stator in an unfolded state according to an embodiment of the present application.
The reference numerals are explained as follows:
10-rotor, 20-stator;
11-pole mounting face;
100-permanent magnet block groups; 200-pressing strips; 300-stator teeth;
110-permanent magnet blocks;
111-end faces on two sides of the permanent magnet block group in the width direction;
111 a-grooves.
Detailed Description
Reference will now be made in detail to the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar parts or parts having the same or similar functions throughout. In addition, if a detailed description of the known art is not necessary for illustrating the features of the present application, it is omitted. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
It will be understood by those within the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It is to be understood that the term "and/or" as used herein is intended to include all or any and all combinations of one or more of the associated listed items.
The axial direction described in the present application refers to the axial direction of the motor rotor, the radial direction refers to the radial direction of the motor rotor, the axial direction of the motor rotor in the length direction of the permanent magnet block group, the width direction of the permanent magnet block group is the circumferential direction of the motor rotor, and the thickness direction of the permanent magnet block group is the radial direction of the motor rotor.
In a first aspect, an embodiment of the present application provides a magnetic pole module, as shown in fig. 1 and fig. 2, including a plurality of permanent magnet blocks 110, where the plurality of permanent magnet blocks 110 are arranged in a row in a close-fitting manner two by two to form a permanent magnet block group 100; the end surfaces 111 on both sides of the permanent magnet block group in the width direction are arc-shaped along the length direction of the permanent magnet block group 100, and the difference between the maximum width and the minimum width of the permanent magnet block group 100 in the width direction is a predetermined value.
The pole module is a component of the motor, and includes not only the permanent magnet blocks 110, but also various connecting parts, for example, in a possible embodiment, the permanent magnet blocks 110 may be used in combination with the silicon steel sheet core, and the permanent magnet blocks 110 and the silicon steel sheet core are connected into a whole by bonding. The magnetic pole module adopts the mode that the permanent magnet blocks 110 and the silicon steel sheet iron cores are bonded together, so that the eddy current loss of the rotor 10 bracket can be reduced, and the assembling time of the magnetic pole module can be reduced. The material of the permanent magnet block 110 is usually a magnetic material, such as a neodymium iron boron permanent magnet material, or a ferrite permanent magnet material. There are also cases where a plurality of permanent magnet blocks 110 are assembled and connected to the same base plate and then integrally assembled into a motor. After the magnetic pole modules are assembled according to design requirements and before the magnetic pole modules are mounted on a magnetic yoke, in order to form a more complete magnetic pole module, glue is generally injected into the whole magnetic pole module so as to form a protective coating on the surface of the whole magnetic pole module.
The magnetic pole module of the above embodiment of the present application includes a permanent magnet block group 100, the permanent magnet block group 100 is formed by splicing a plurality of permanent magnet blocks 110, and since the end surfaces 111 on both sides of the permanent magnet block group in the width direction are arc-shaped along the length direction of the permanent magnet block group 100, the end surfaces on both sides of each permanent magnet block 110 forming the end surfaces 111 on both sides of the permanent magnet block group in the width direction are arc-shaped. Because the end surfaces 111 on the two sides of the permanent magnet block group in the width direction are arc-shaped along the length direction of the permanent magnet block group 100, the cogging torque can be reduced, the vibration and noise of a motor system are reduced, and the control precision of the motor system is improved. As shown in fig. 2, there is a certain width difference between the maximum width and the minimum width in the width direction of the permanent magnet block group, and D/2 indicated in the figure is half of the difference between the maximum width and the minimum width.
The application provides a magnetic pole module includes permanent magnet block group 100 that the polylith permanent magnet arranged becomes, and the terminal surface 111 of this permanent magnet block group width direction both sides is the arc along permanent magnet block group 100 length direction, has the form of circular arc transition, can make the motor including magnetic pole module reduce cogging torque, realizes reducing motor system's vibration and noise, improves motor system's control accuracy.
In some possible embodiments, as shown in fig. 3, the permanent magnet block group 100 has a trapezoidal cross-sectional shape in the width direction. The width direction is the width direction of the permanent magnet block group 100, namely the circumferential direction of the motor rotor, and by adopting the permanent magnet block group 100 with the trapezoidal cross section shape along the width direction, the harmonic content of the air gap magnetic field can be effectively reduced, so that the cogging torque is further reduced.
In one particular embodiment, as shown in fig. 3, the permanent magnet block set 100 is symmetrical about a center plane in the length direction. The longitudinal direction is the longitudinal direction of the permanent magnet block group 100, i.e. the axial direction of the motor rotor, the central plane of the longitudinal direction is the central plane located in the axial direction of the motor rotor, and the cross-sectional shape of the permanent magnet block group 100 along the width direction is a symmetrical figure, such as a rectangle or an isosceles trapezoid. When an isosceles trapezoid is used, not only can cogging torque be further reduced, but also assembly of the magnetic pole module can be facilitated, the details of which are described in the second aspect of the present application.
In one possible embodiment, as shown in fig. 2 and 4, the permanent magnet block group 100 is symmetrical with respect to the center plane in the width direction; the width of the permanent magnet block group 100 in the width direction gradually increases from the two ends to the middle; the pole arc coefficient of the permanent magnet block group 100 is 0.8-0.85. The polar arc coefficient range includes an upper limit value and a lower limit value, that is, the polar arc coefficient of the permanent magnet block group 100 may be 0.85 or 0.8. For example, the permanent magnet block group 100 having a rectangular cross-sectional shape in the width direction also achieves the technical effects of the present application, and also has a feature of more convenient processing. Of course, the permanent magnet block group 100 must have the precondition that the end surfaces 111 on both sides of the permanent magnet block group in the width direction are arc-shaped along the length direction of the permanent magnet block group 100. In addition, specifically, the width of the permanent magnet block group 100 is smaller at both ends and larger in the middle, the whole is in the shape of a bar-shaped bread, and the difference between the maximum width and the minimum width of the permanent magnet block group 100 in the width direction is a predetermined value, which generally corresponds to a dimension parameter on other parts of the motor, in order to achieve the purpose of reducing the cogging torque to the maximum extent. Furthermore, the ratio of the pole arc length to the pole pitch is referred to, the larger the pole arc coefficient of the permanent magnet block group 100 is, the larger the effective magnetic flux is, but the larger the effective magnetic flux is, the problem of inconvenience in fixing is generated, and the smaller the pole arc coefficient is, the easier the fixing is, but permanent magnet material waste is caused.
In some specific embodiments, the variation of the width of the permanent magnet block group 100 in the axial direction is a continuously varying curve. Making the permanent magnet block set 100 more convenient to produce and also to install on the pole module. The permanent magnet block group 100 is composed of a plurality of permanent magnet blocks 110, the plurality of permanent magnet blocks 110 have the same length in the axial direction and the same thickness in the radial direction, the permanent magnet block group 100 can be conveniently assembled, and the composed permanent magnet block group 100 has planar upper and lower surfaces, so that the space between the surface of the magnetic pole module close to the stator in the motor and the stator is ensured to meet the design requirement.
Based on the same inventive concept, in a second aspect, the present application provides a rotor 10, as shown in fig. 5, including a magnetic yoke and the magnetic pole module provided in the first aspect of the present application, wherein a plurality of pressing strips 200 are uniformly arranged on a magnetic pole mounting surface 11 of the magnetic yoke along the circumferential direction of the magnetic yoke, a magnetic pole module is clamped between two pressing strips 200, and a predetermined included angle β is formed between the length direction of the magnetic pole module and the central axis of the magnetic yoke.
The yoke that this embodiment second aspect provided can realize well matching with the magnetic pole module that this application embodiment first aspect provided to constitute the modularization part, can realize carrying out the assembly of motor major structure earlier at the project scene, then the operation of reassembling modularization magnetic pole module, reduce the work load of on-the-spot assembly, reduce the degree of difficulty of total assembly, improve assembly efficiency, reduction in production cost. Because the permanent magnet block group 100 included in the magnetic pole module provided by the application has a special shape, and the end faces 111 on both sides of the permanent magnet block group in the width direction are arc-shaped along the length direction of the permanent magnet block group 100, the magnetic pole module cannot be assembled in a manner of directly inserting the magnetic pole module from one end of the two pressing strips 200, but the magnetic pole module is assembled on the magnetic pole mounting surface 11 of the magnetic yoke firstly, then the pressing strips 200 are assembled, and the magnetic pole module is fixed. The rotor 10 provided by the application is formed by assembling the magnetic pole modules in a radial surface-mounted mode, so that the magnetic leakage coefficient of the magnetic pole modules can be reduced, and the utilization rate of the permanent magnet blocks 110 in the magnetic pole modules is improved.
In addition, the permanent magnet block group 100 with the arc-shaped side end face is adopted, the magnetic pole module is firstly installed, and then the pressing strips 200 for fixing are arranged on the end faces of the two sides of the magnetic pole module, so that the abrasion problem in the process of pushing the permanent magnet block 110 in the common magnetic pole module can be avoided, and the completeness of the surface coating of the permanent magnet block 110 can be ensured.
The rotor 10 that this application provided is formed by the assembly of yoke and the magnetic pole module that this application first aspect provided, and the magnetic pole module includes permanent magnet block group 100 that the polylith permanent magnet was arranged into, and the terminal surface 111 of this permanent magnet block group width direction both sides is the arc along permanent magnet block group 100 length direction, has the form of circular arc transition, can make the motor including the magnetic pole module reduce the tooth's socket torque, realizes reducing motor system's vibration and noise, improves the purpose to motor system control accuracy.
In some possible embodiments, the pressing bar 200 abuts on the end surfaces 111 on both sides of the width direction of the permanent magnet block group of the magnetic pole module. The permanent magnet block group 100, that is, the magnetic pole module is firmly mounted on the magnetic pole mounting surface 11 of the magnetic yoke by the sufficient abutting of the pressing strip 200 to the magnetic pole module. For example, for the permanent magnet block group 100 having a trapezoidal cross-sectional shape in the width direction, corresponding to the permanent magnet block group 100 having an isosceles trapezoidal cross-sectional shape described above, it is possible to stably mount the magnetic pole modules by forming a specific symmetrical structure like a dovetail groove by the molding strip 200 without using other additional structural arrangements and machining.
In a specific embodiment, as shown in fig. 4 and 5, the pressing bar 200 is provided with a protrusion (not shown), and the end surfaces 111 on both sides of the permanent magnet block group in the width direction are provided with grooves 111a matching with the protrusion. The projections are matched with the grooves 111a, and can ensure that the magnetic pole module is stable and immovable after being mounted on the magnetic pole mounting surface 11, does not fail even under high-speed rotation, and has long service life. For example, with respect to the permanent magnet block group 100 having a rectangular cross-sectional shape in the width direction, the grooves 111a are provided on the side end faces of the permanent magnet block group 100, and the bead 200 is provided with the protrusions, so that the stable assembly of the magnetic pole module can be achieved.
In some possible embodiments, as shown in fig. 5, the predetermined angle β is 13 ° to 17 °, the angle range includes a lower limit value and an upper limit value, that is, the predetermined angle β may be 13 ° or 17 °, the length direction of the magnetic pole module forms a predetermined angle β with the central axis of the magnetic yoke, that is, the central line of the magnetic pole formed by the arrangement of the permanent magnet blocks 100 is inclined by a certain angle with respect to the central axis of the magnetic yoke, so as to effectively reduce the cogging torque and the torque ripple of the permanent magnet motor, referring to fig. 5, when the length direction of the magnetic pole module forms a predetermined angle with the central axis of the magnetic yoke, the length direction of the magnetic pole module forms a certain inclination angle θ with the straight line where the edge of the unfolding structure of the magnetic yoke is located, and the inclination angle θ differs from the predetermined angle β by 90 °.
Based on the same inventive concept, in a third aspect, the present application provides a motor including a stator 20 and a rotor 10 provided in the second aspect of the present application.
The application provides a magnetic pole module of adopting special construction among the motor, this magnetic pole module includes permanent magnet block group 100 that the polylith permanent magnet arranged, and the terminal surface 111 of permanent magnet block group width direction both sides is the arc along permanent magnet block group 100 length direction, has the form of circular arc transition, can make the motor including magnetic pole module reduce cogging torque, and motor system's vibration and noise are littleer to motor system's control accuracy is higher.
In one possible embodiment, as shown in fig. 2 and 6, the pitch of the stator 20 is equal to a predetermined value. Fig. 6 is a schematic plan view of the stator 20, in which the distance D in fig. 6 is a pitch between two teeth 300 in the stator 20, and the difference between the maximum width and the minimum width of the permanent magnet block group 100 in the width direction is a predetermined value corresponding to the permanent magnet block group 100 in the magnetic pole module described above, and the predetermined value is set to a pitch size of the stator 20, so as to achieve the purpose of reducing the cogging torque to the maximum extent.
The technical scheme provided by the embodiment of the application has the following beneficial technical effects:
compared with the prior art, the magnetic pole module structure, the rotor and the motor provided by the application have the following advantages:
1. the magnetic pole module has the advantages of simple structure and easiness in assembly, can conveniently form a modular unit for combined installation, and can realize the process of firstly assembling the main structure of the motor on a project site and then assembling the modular magnetic pole module structure.
2. The permanent magnet blocks on the magnetic pole module have special shapes, the end faces of two sides of the width direction of the permanent magnet block group formed by arranging the permanent magnet blocks are arc-shaped along the length direction of the permanent magnet block group, the cogging torque and the torque ripple of the permanent magnet motor can be effectively reduced, the vibration and the noise of a motor system can be smaller, and the control precision of the motor system is higher.
3. The cross section shape of the permanent magnet block group on the magnetic pole module along the width direction is trapezoidal, so that the harmonic content of an air gap magnetic field can be effectively reduced, and the cogging torque is further reduced.
4. The cross section shape of the permanent magnet block group along the width direction is set to be isosceles trapezoid, the structural stability of the magnet yoke can be improved, and the magnetic pole module is stably installed on the magnetic pole installation surface.
Those of skill in the art will appreciate that the various operations, methods, steps in the processes, acts, or solutions discussed in this application can be interchanged, modified, combined, or eliminated. Further, other steps, measures, or schemes in various operations, methods, or flows that have been discussed in this application can be alternated, altered, rearranged, broken down, combined, or deleted. Further, steps, measures, schemes in the prior art having various operations, methods, procedures disclosed in the present application may also be alternated, modified, rearranged, decomposed, combined, or deleted.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
It should be understood that, although the steps in the flowcharts of the figures are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and may be performed in other orders unless explicitly stated herein. Moreover, at least a portion of the steps in the flow chart of the figure may include multiple sub-steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed alternately or alternately with other steps or at least a portion of the sub-steps or stages of other steps.
The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.
Claims (12)
1. The magnetic pole module is characterized by comprising a plurality of permanent magnet blocks (110), wherein the permanent magnet blocks (110) are arranged in a row in a close fit manner two by two to form a permanent magnet block group (100); the end faces (111) on two sides of the width direction of the permanent magnet block group (100) are arc-shaped along the length direction of the permanent magnet block group (100), and the difference between the maximum width and the minimum width of the width direction of the permanent magnet block group (100) is a preset value.
2. The pole module of claim 1 wherein the permanent magnet block set is trapezoidal in cross-sectional shape in the width direction.
3. A pole module according to claim 1 or 2, characterized in that the permanent magnet block set (100) is symmetrical with respect to a center plane in the length direction.
4. A pole module according to claim 1, characterised in that the permanent magnet block groups (100) are symmetrical about a width-wise centre plane; the width of the permanent magnet block group (100) is gradually increased from two ends to the middle along the axial direction; the pole arc coefficient of the permanent magnet block group (100) is 0.8-0.85.
5. A pole module according to claim 4, characterised in that the variation of the width of the permanent magnet block set (100) in the axial direction is a continuously varying curve.
6. A pole module according to claim 4, wherein a plurality of the permanent magnet blocks (110) are of the same length in the axial direction and of the same thickness in the radial direction.
7. A rotor (10) comprising a yoke and a pole module according to any one of claims 1 to 6;
a plurality of pressing strips (200) are uniformly arranged on the magnetic pole mounting surface (11) of the magnetic yoke along the circumferential direction of the magnetic yoke, and one magnetic pole module is clamped between the two pressing strips (200); the length direction of the magnetic pole module and the central axis of the magnetic yoke form a preset included angle.
8. The rotor (10) according to claim 7, characterized in that the compression beads (200) abut against the end faces of the permanent magnet block groups (100) of the pole modules on both sides in the width direction.
9. The rotor (10) according to claim 8, wherein the compression bar (200) is provided with a convex part, and the end surfaces of the permanent magnet block group (100) at two sides in the width direction are provided with grooves (111a) matched with the convex part.
10. The rotor (10) of claim 7, wherein the predetermined included angle is 13 ° to 17 °.
11. An electrical machine, characterized by comprising a stator (20) and a rotor (10) according to any of claims 7-10.
12. The machine according to claim 11, characterized in that the pitch of the stator (20) is equal to said predetermined value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921742842.9U CN210431049U (en) | 2019-10-16 | 2019-10-16 | Magnetic pole module, rotor and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921742842.9U CN210431049U (en) | 2019-10-16 | 2019-10-16 | Magnetic pole module, rotor and motor |
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| Publication Number | Publication Date |
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| CN210431049U true CN210431049U (en) | 2020-04-28 |
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| CN201921742842.9U Active CN210431049U (en) | 2019-10-16 | 2019-10-16 | Magnetic pole module, rotor and motor |
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| CN (1) | CN210431049U (en) |
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Address after: No.107 Shanghai Road, Urumqi Economic and Technological Development Zone, Urumqi City, Xinjiang Uygur Autonomous Region Patentee after: Jinfeng Technology Co.,Ltd. Address before: No.107 Shanghai Road, Urumqi Economic and Technological Development Zone, Urumqi City, Xinjiang Uygur Autonomous Region Patentee before: XINJIANG GOLDWIND SCIENCE & TECHNOLOGY Co.,Ltd. |