Permanent magnet rotor structure design method and device, permanent magnet rotor, and computer device

Abstract

The application relates to a structure design method and device of a permanent magnet rotor, the permanent magnet rotor, computer equipment, a storage medium and a computer program product. The method comprises the following steps: obtaining stress distribution information of an initial structure of a permanent magnet rotor; adjusting the geometric shape of the initial structure of the permanent magnet rotor according to the stress distribution information to obtain a permanent magnet rotor of an adjusted structure; and adjusting the magnetic field distribution of the permanent magnet rotor of the adjusted structure according to the magnetic force information of the permanent magnet rotor of the adjusted structure to obtain a permanent magnet rotor of a target structure; wherein the mechanical load bearing capacity and the operating speed bearing capacity of the permanent magnet rotor of the target structure are higher than those of the initial structure of the permanent magnet rotor. The method can optimize the material mechanical properties and magnetic properties of the permanent magnet rotor, thereby improving the structural strength and magnetic stability of the permanent magnet rotor of the target structure.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of electric machines, in particular to a structure design method and device of a permanent magnet rotor, a permanent magnet rotor, a computer device, a storage medium and a computer program product. BACKGROUND

[0002] The permanent magnet rotor has been an important research direction in the field of magnetic materials and electric machines. As a key component of an electric machine and a flywheel energy storage system (FESS), the permanent magnet rotor directly affects the performance and operating efficiency of the flywheel energy storage system.

[0003] In the conventional technology, the structure of the permanent magnet rotor is usually designed to be flat and uniform. However, the permanent magnet rotor with the conventional structure has a large stress value when rotating at a high speed, which easily causes failure of the permanent magnet rotor. Therefore, the operating speed of the permanent magnet rotor needs to be reduced, resulting in low operating efficiency of the flywheel energy storage system connected to the permanent magnet rotor. SUMMARY

[0004] Therefore, it is necessary to provide a structure design method and device of a permanent magnet rotor, a permanent magnet rotor, a computer device, a computer readable storage medium and a computer program product, which can improve the mechanical load bearing capacity and operating speed bearing capacity of the permanent magnet rotor.

[0005] In a first aspect, the application provides a structure design method of a permanent magnet rotor. The method comprises:

[0006] obtaining stress distribution information of an initial structure of the permanent magnet rotor;

[0007] adjusting the geometric shape of the initial structure of the permanent magnet rotor according to the stress distribution information to obtain a permanent magnet rotor of an adjusted structure;

[0008] adjusting the magnetic field distribution of the permanent magnet rotor of the adjusted structure according to the magnetic force information of the permanent magnet rotor of the adjusted structure to obtain a permanent magnet rotor of a target structure;

[0009] The mechanical load bearing capacity and operating speed bearing capacity of the permanent magnet rotor of the target structure are higher than those of the initial structure of the permanent magnet rotor.

[0010] In one embodiment, adjusting the geometric shape of the initial structure of the permanent magnet rotor according to the stress distribution information to obtain the permanent magnet rotor of the adjusted structure comprises:

[0011] determining a target stress value satisfying a preset stress threshold condition from the stress distribution information;

[0012] According to the corresponding structure position information of the target stress value in the initial structure of the permanent magnet rotor, the profile and cross section of the initial structure of the permanent magnet rotor are adjusted to obtain the permanent magnet rotor of the adjusted structure.

[0013] In one of the embodiments, according to the magnetic force information of the permanent magnet rotor of the adjusted structure, the magnetic field distribution of the permanent magnet rotor of the adjusted structure is adjusted to obtain the permanent magnet rotor of the target structure, including:

[0014] According to the magnetic force information of the permanent magnet rotor of the adjusted structure, the magnetic pole layout of the permanent magnet rotor of the adjusted structure is adjusted to obtain the permanent magnet rotor of the candidate structure;

[0015] According to the magnetic field distribution information of the permanent magnet rotor of the candidate structure, the magnetic circuit of the permanent magnet rotor of the candidate structure is adjusted to obtain the permanent magnet rotor of the target structure.

[0016] In one of the embodiments, the permanent magnet rotor of the candidate structure is determined as the permanent magnet rotor of the target structure, including:

[0017] According to the magnetic field distribution information of the permanent magnet rotor of the candidate structure, the magnetic circuit of the permanent magnet rotor of the candidate structure is adjusted to obtain the permanent magnet rotor of the updated structure;

[0018] If the magnetic stability of the permanent magnet rotor of the updated structure reaches the preset magnetic stability condition, the permanent magnet rotor of the candidate structure is set as the permanent magnet rotor of the target structure.

[0019] In one of the embodiments, the stress distribution information of the initial structure of the permanent magnet rotor is obtained, including:

[0020] The profile graph of the initial structure of the permanent magnet rotor is obtained;

[0021] The stress analysis of the initial structure of the permanent magnet rotor is performed to obtain the stress distribution information of the initial structure of the permanent magnet rotor under the profile graph.

[0022] In a second aspect, the application further provides a structure design device of a permanent magnet rotor. The device includes:

[0023] An information acquisition module is configured to obtain the stress distribution information of the initial structure of the permanent magnet rotor;

[0024] A shape design module is configured to adjust the geometric shape of the initial structure of the permanent magnet rotor according to the stress distribution information to obtain the permanent magnet rotor of the adjusted structure;

[0025] a magnetic field design module, configured to adjust a magnetic field distribution of the permanent magnet rotor in the adjusted structure according to magnetic force information of the permanent magnet rotor in the adjusted structure, to obtain a target structure permanent magnet rotor, wherein the target structure permanent magnet rotor has a higher mechanical load bearing capacity and operating speed bearing capacity than the initial structure permanent magnet rotor.

[0026] In a third aspect, the present application further provides a permanent magnet rotor, which is applied to the structure design method of the permanent magnet rotor as described in the first aspect.

[0027] The target part in the rotor body is in a horn shape, and an outer diameter of the target part gradually decreases or gradually increases along a preset direction, and an outer diameter of a part other than the target part in the rotor body remains unchanged in the preset direction.

[0028] In a fourth aspect, the present application further provides a computer device. The computer device comprises a memory and a processor, the memory stores a computer program, and the processor realizes the following steps when executing the computer program:

[0029] obtaining stress distribution information of an initial structure permanent magnet rotor;

[0030] adjusting a geometric shape of the initial structure permanent magnet rotor according to the stress distribution information, to obtain an adjusted structure permanent magnet rotor;

[0031] adjusting a magnetic field distribution of the adjusted structure permanent magnet rotor according to magnetic force information of the adjusted structure permanent magnet rotor, to obtain a target structure permanent magnet rotor;

[0032] wherein the target structure permanent magnet rotor has a higher mechanical load bearing capacity and operating speed bearing capacity than the initial structure permanent magnet rotor.

[0033] In a fifth aspect, the present application further provides a computer readable storage medium. The computer readable storage medium stores a computer program, and the computer program is executed by a processor to realize the following steps:

[0034] obtaining stress distribution information of an initial structure permanent magnet rotor;

[0035] adjusting a geometric shape of the initial structure permanent magnet rotor according to the stress distribution information, to obtain an adjusted structure permanent magnet rotor;

[0036] adjust the magnetic field distribution of the permanent magnet rotor of the adjusted structure according to the magnetic force information of the permanent magnet rotor of the adjusted structure, to obtain a target structure permanent magnet rotor;

[0037] The mechanical load bearing capacity and operating speed bearing capacity of the target structure permanent magnet rotor are higher than those of the initial structure permanent magnet rotor.

[0038] In a sixth aspect, the present application also provides a computer program product. The computer program product comprises a computer program which, when executed by a processor, implements the following steps:

[0039] obtain stress distribution information of a permanent magnet rotor of an initial structure;

[0040] adjust the geometric shape of the permanent magnet rotor of the initial structure according to the stress distribution information, to obtain a permanent magnet rotor of an adjusted structure;

[0041] adjust the magnetic field distribution of the permanent magnet rotor of the adjusted structure according to the magnetic force information of the permanent magnet rotor of the adjusted structure, to obtain a target structure permanent magnet rotor;

[0042] The mechanical load bearing capacity and operating speed bearing capacity of the target structure permanent magnet rotor are higher than those of the initial structure permanent magnet rotor.

[0043] The structure design method, device, permanent magnet rotor, computer equipment, storage medium and computer program product of the permanent magnet rotor obtain stress distribution information of a permanent magnet rotor of an initial structure; adjust the geometric shape of the permanent magnet rotor of the initial structure according to the stress distribution information, to obtain a permanent magnet rotor of an adjusted structure; adjust the magnetic field distribution of the permanent magnet rotor of the adjusted structure according to the magnetic force information of the permanent magnet rotor of the adjusted structure, to obtain a target structure permanent magnet rotor; wherein the mechanical load bearing capacity and operating speed bearing capacity of the target structure permanent magnet rotor are higher than those of the initial structure permanent magnet rotor. By adjusting the geometric shape of the permanent magnet rotor, the target structure permanent magnet rotor can withstand stronger mechanical load, and by adjusting the magnetic field distribution of the permanent magnet rotor, the target structure permanent magnet rotor can withstand faster operating speed, which optimizes the material mechanics performance and magnetic performance of the permanent magnet rotor, and greatly improves the structural strength and magnetic stability of the target structure permanent magnet rotor. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 a flowchart of a structure design method of a permanent magnet rotor in an embodiment;

[0045] Figure 2 Figure 1 is a flowchart of a method for designing a structure of a permanent magnet rotor in an embodiment;

[0046] Figure 3(a) is a diagram of stress values in an embodiment;

[0047] Figure 3(b) is a diagram of a cross section of a permanent magnet rotor of an initial structure in an embodiment;

[0048] Figure 3(c) is a diagram of a cross section of a permanent magnet rotor of a target structure in an embodiment;

[0049] Figure 4 Figure 4 is a flowchart of a method for designing a structure of a permanent magnet rotor in another embodiment;

[0050] Figure 5(a) is a diagram of surface stress distribution of a permanent magnet rotor of an initial structure in an embodiment;

[0051] Figure 5(b) is a diagram of surface stress distribution of a permanent magnet rotor of a target structure in an embodiment;

[0052] Figure 6 Figure 6 is a block diagram of a structure of a device for designing a structure of a permanent magnet rotor in an embodiment;

[0053] Figure 7 Figure 7 is a diagram of an internal structure of a computer device in an embodiment. DETAILED DESCRIPTION

[0054] In order to make the objects, technical solutions and advantages of the present application clearer, further detailed description will be made to the present application with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0055] It should be noted that the user information (including but not limited to the equipment information, personal information, etc. of the user of the permanent magnet rotor in design, management, supervision, use, etc.) and data (including but not limited to the data for analysis, storage, display, etc. of the permanent magnet rotor) involved in the present application are all information and data authorized by the user or authorized by all parties, and the collection, use and processing of the related data need to comply with the relevant provisions.

[0056] In an embodiment, as shown in Figure 1 a structure design method of a permanent magnet rotor is provided, and the present embodiment takes the method applied to a terminal as an example for illustration. It should be understood that the method can also be applied to a server, and can also be applied to a system including a terminal and a server, and can be realized through the interaction of the terminal and the server. In the present embodiment, the method includes the following steps:

[0057] In step S101, stress distribution information and magnetic force information of the permanent magnet rotor in an initial structure are obtained.

[0058] The permanent magnet rotor is a rotor of an electric motor. The stress distribution information is used to describe the distribution of stress values and directions of the permanent magnet rotor at different points in a certain cross section (for example, a cross section). Stress is a physical quantity used to describe the force condition of an object (for example, a permanent magnet rotor).

[0059] In the prior art, the permanent magnet rotor is usually designed to be flat and uniform in structure, that is, the initial structure is usually flat and uniform in structure. For example, the initial structure can be a cylindrical structure. The permanent magnet rotor designed in this way has the advantages of simple manufacturing and relatively low manufacturing cost. However, this kind of structure design also has the defects of insufficient mechanical structure strength and low magnetic stability. Therefore, the present application optimizes the structure design of the permanent magnet rotor in the initial structure in view of the technical defects of the permanent magnet rotor in the initial structure.

[0060] Specifically, the terminal performs stress analysis on the permanent magnet rotor in the initial structure to obtain the stress distribution information of the permanent magnet rotor in the initial structure.

[0061] In step S102, the geometric shape of the permanent magnet rotor in the initial structure is adjusted according to the stress distribution information, and a permanent magnet rotor in an adjusted structure is obtained.

[0062] The permanent magnet rotor in the adjusted structure represents the permanent magnet rotor obtained after the mechanical structure is adjusted.

[0063] Specifically, the terminal can determine the part with a large stress value in the permanent magnet rotor in the initial structure according to the stress distribution information of the permanent magnet rotor in the initial structure, and then adjust the geometric shape of the part, such as adjusting the contour and cross section of the part, to reduce the stress value of the part, so that the permanent magnet rotor in the adjusted structure obtained after adjustment has high mechanical stability.

[0064] In step S103, the magnetic field distribution of the permanent magnet rotor in the adjusted structure is adjusted according to the magnetic force information of the permanent magnet rotor in the adjusted structure, and a permanent magnet rotor in a target structure is obtained. The mechanical load bearing capacity and operating speed bearing capacity of the permanent magnet rotor in the target structure are higher than those of the permanent magnet rotor in the initial structure.

[0065] The magnetic force information is used to describe the information of the permanent magnet rotor in the magnetic field and the rotational kinetic energy. The permanent magnet rotor in the target structure represents the permanent magnet rotor obtained after the mechanical structure and the magnetic field distribution are adjusted.

[0066] Specifically, the terminal can also analyze the magnetic stability of the permanent magnet rotor of the adjusted structure according to the magnetic force information of the permanent magnet rotor of the initial structure, and further adjust the magnetic field distribution of the permanent magnet rotor of the adjusted structure based on the magnetic stability, so that the permanent magnet rotor of the target structure obtained by processing also has high magnetic stability.

[0067] In actual application, the permanent magnet rotor of the target structure can be applied in a flywheel energy storage system (FESS). The flywheel energy storage system is an electromechanical energy conversion energy storage device, which can realize mutual conversion and storage between electrical energy and mechanical energy of high-speed rotating flywheel. It should be noted that the superconducting magnetic suspension technology can significantly reduce mechanical friction to improve the efficiency of energy conversion and the overall performance of the system. The permanent magnet rotor can be suspended by the strong magnetic field generated by the superconducting coil or electromagnet, and the flywheel in the flywheel energy storage system is linked through the rotating shaft at the upper end of the permanent magnet rotor. Therefore, the flywheel energy storage system can use the superconducting magnetic suspension technology to realize the non-contact rotation of the permanent magnet rotor, reduce the energy loss of the flywheel energy storage system, and prolong the service life of the flywheel energy storage system. Since the flywheel and the permanent magnet rotor are in rigid linkage, the flywheel and the permanent magnet rotor have the same angular velocity. However, too high rotating speed can increase the stress of the permanent magnet rotor and possibly damage the permanent magnet rotor. Therefore, the mechanical structural strength of the permanent magnet rotor directly affects whether the flywheel energy storage system can safely reach the highest rotating speed.

[0068] The mechanical load bearing capacity is used to represent the size of the mechanical load that the permanent magnet rotor can bear when rotating at high speed. The operating speed bearing capacity is used to represent the size of the rotating speed that the permanent magnet rotor can bear.

[0069] In the structure design method of the permanent magnet rotor, the stress distribution information of the permanent magnet rotor of the initial structure is obtained; the geometric shape of the permanent magnet rotor of the initial structure is adjusted according to the stress distribution information to obtain the permanent magnet rotor of the adjusted structure; the magnetic field distribution of the permanent magnet rotor of the adjusted structure is adjusted according to the magnetic force information of the permanent magnet rotor of the adjusted structure to obtain the permanent magnet rotor of the target structure; and the mechanical load bearing capacity and the operating speed bearing capacity of the permanent magnet rotor of the target structure are higher than those of the permanent magnet rotor of the initial structure. By adjusting the geometric shape of the permanent magnet rotor, the permanent magnet rotor of the target structure can bear stronger mechanical load, and by adjusting the magnetic field distribution of the permanent magnet rotor, the permanent magnet rotor of the target structure can bear faster operating speed. The method optimizes the material mechanical properties and magnetic properties of the permanent magnet rotor, greatly improves the structural strength and magnetic stability of the permanent magnet rotor of the target structure.

[0070] In one embodiment, as Figure 2As shown in the above step S102, the permanent magnet rotor of the initial structure is adjusted in geometric shape according to the stress distribution information, and the permanent magnet rotor of the adjusted structure is obtained, which specifically includes the following steps:

[0071] Step S201, determining the target stress value satisfying the preset stress threshold condition from the stress distribution information.

[0072] Specifically, FIG. 3(a) is a stress value schematic diagram, FIG. 3(b) is a cross-sectional schematic diagram of the permanent magnet rotor of the initial structure, and FIG. 3(c) is a cross-sectional schematic diagram of the permanent magnet rotor of the target structure. The stress distribution information corresponding to the cross section is also shown in FIG. 3(b) and FIG. 3(c). As shown in FIG. 3(b), the permanent magnet rotor of the initial structure gradually rises from right to left, and especially the stress value of the leftmost side reaches 2.2*10 8 *10 8 *10 8 *10 8 If the terminal sets the preset stress threshold condition as the stress value exceeding the stress threshold (such as 1.1*10

[0073] Step S202, adjusting the contour and cross section of the permanent magnet rotor of the initial structure according to the structure position information corresponding to the target stress value in the permanent magnet rotor of the initial structure, to obtain the permanent magnet rotor of the adjusted structure.

[0074] Specifically, the terminal determines the structure position information corresponding to one or more target stress values in the permanent magnet rotor of the initial structure. Then the terminal adjusts the contour and cross section of the part corresponding to one or more structure position information in the permanent magnet rotor of the initial structure, for example, assuming that the part originally has a uniform contour diameter, like a cylindrical shape, and its cross section is rectangular. The original uniform and flat contour of the part can be adjusted to a variable diameter and curved contour to optimize the stress distribution of the part, and the cross section of the part is adjusted to a horn shape, such as the horn shape on the left side of the cross-sectional view in FIG. 3(c). Finally, the terminal obtains the permanent magnet rotor of the adjusted structure.

[0075] In this embodiment, based on the stress distribution information of the permanent magnet rotor of the initial structure, the contour and cross section of the part of the permanent magnet rotor of the initial structure satisfying the preset stress threshold condition are adjusted, so that the stress value of the part of the permanent magnet rotor of the adjusted structure is significantly reduced, effectively improving the structural strength of the permanent magnet rotor of the adjusted structure and / or the permanent magnet rotor of the target structure, thereby enhancing the mechanical structural stability of the permanent magnet rotor of the adjusted structure and / or the permanent magnet rotor of the target structure when rotating at high speed.

[0076] In one embodiment, the step S103 further comprises the following steps: adjusting the magnetic pole layout of the permanent magnet rotor of the adjusted structure according to the magnetic force information of the permanent magnet rotor of the adjusted structure to obtain a candidate structure of the permanent magnet rotor; and adjusting the magnetic circuit of the permanent magnet rotor of the candidate structure according to the magnetic field distribution information of the permanent magnet rotor of the candidate structure to obtain the target structure of the permanent magnet rotor.

[0077] When the permanent magnet rotor rotates at a high speed, the magnetic field distribution of the permanent magnet rotor affects the interaction with the superconducting magnetic bearing. Therefore, the terminal can further optimize the magnetic performance of the permanent magnet rotor of the adjusted structure. Specifically, the terminal can perform magnetic field analysis and rotation analysis on the permanent magnet rotor of the adjusted structure according to the rotor magnetic flux and the rotation direction of the permanent magnet rotor of the initial structure to obtain the magnetic force information of the permanent magnet rotor of the adjusted structure; the terminal adjusts the magnetic pole layout of the permanent magnet rotor of the adjusted structure according to the magnetic force information to change the magnetic field distribution (such as the magnetic field shape, the magnetic field strength and the magnetic field direction) of the permanent magnet rotor of the adjusted structure, the magnetic force generated by the permanent magnet rotor, the stability between the magnetic poles and the energy transmission and conversion efficiency, and further processes to obtain the candidate structure of the permanent magnet rotor; and the terminal calculates the magnetic field distribution information of the permanent magnet rotor of the candidate structure and further adjusts the magnetic circuit of the permanent magnet rotor of the candidate structure based on the magnetic field distribution information to further optimize the magnetic field of the target structure of the permanent magnet rotor obtained by processing.

[0078] In the embodiment, by adjusting the magnetic pole layout of the permanent magnet rotor of the adjusted structure and adjusting the magnetic circuit of the permanent magnet rotor of the candidate structure, the fine adjustment of the magnetic field of the permanent magnet rotor is realized, so that the target structure of the permanent magnet rotor obtained by processing can generate a high-efficiency and uniformly distributed magnetic field when rotating at a high speed, thereby improving the magnetic stability of the target structure of the permanent magnet rotor.

[0079] In one embodiment, the candidate structure of the permanent magnet rotor is determined as the target structure of the permanent magnet rotor, which specifically comprises the following steps: adjusting the magnetic circuit of the permanent magnet rotor of the candidate structure according to the magnetic field distribution information of the permanent magnet rotor of the candidate structure to obtain an updated structure of the permanent magnet rotor; and if the magnetic stability of the permanent magnet rotor of the updated structure reaches a preset magnetic stability condition, the candidate structure of the permanent magnet rotor is set as the target structure of the permanent magnet rotor.

[0080] The magnetic stability is used to measure the magnetic field stability of the permanent magnet rotor. The preset magnetic stability condition refers to a judgment condition set for the magnetic stability, for example, the preset magnetic stability condition can be set as reaching a stability threshold.

[0081] Specifically, the terminal can adjust the magnetic circuit of the permanent magnet rotor of the candidate structure according to the magnetic field distribution information of the permanent magnet rotor of the candidate structure, such as changing the magnetic circuit transmission path of the permanent magnet rotor of the candidate structure, so that the magnetic field distribution of the permanent magnet rotor of the updated structure obtained by processing is more uniform. The terminal obtains the magnetic field uniformity, magnetic field direction information and magnetic force information of the permanent magnet rotor of the updated structure according to the magnetic field distribution information of the permanent magnet rotor of the updated structure, and further obtains the magnetic stability of the permanent magnet rotor of the updated structure according to the magnetic field uniformity, magnetic field direction information and magnetic force information. The terminal judges whether the magnetic stability of the permanent magnet rotor of the updated structure reaches the stability threshold value; if the magnetic stability of the permanent magnet rotor of the updated structure reaches the stability threshold value, the permanent magnet rotor of the candidate structure is set as the permanent magnet rotor of the target structure; if the magnetic stability of the permanent magnet rotor of the updated structure does not reach the stability threshold value, the terminal can continue to adjust the magnetic circuit of the permanent magnet rotor of the updated structure until the magnetic stability of the permanent magnet rotor of the updated structure reaches the stability threshold value.

[0082] In the embodiment, the magnetic circuit of the permanent magnet rotor of the candidate structure is adjusted according to the magnetic field distribution information of the permanent magnet rotor of the candidate structure to obtain the permanent magnet rotor of the updated structure; then whether the permanent magnet rotor of the candidate structure is set as the permanent magnet rotor of the target structure is determined according to whether the magnetic stability of the permanent magnet rotor of the updated structure reaches the preset magnetic stability condition, so that the adjustment and optimization of the magnetic stability of the permanent magnet rotor are realized, and the target structure obtained by processing can generate a high-efficiency and uniformly distributed magnetic field when rotating at a high speed, thereby improving the magnetic stability of the permanent magnet rotor of the target structure.

[0083] In one embodiment, the step S101 of obtaining the stress distribution information and the magnetic force information of the permanent magnet rotor of the initial structure specifically includes the following steps: obtaining a cross-sectional view of the permanent magnet rotor of the initial structure; and performing stress analysis on the permanent magnet rotor of the initial structure to obtain the stress distribution information of the permanent magnet rotor of the initial structure under the cross-sectional view.

[0084] Specifically, the terminal can obtain a cross-sectional view of the permanent magnet rotor of the initial structure; wherein the cross-sectional view is used to represent the structure shape inside the permanent magnet rotor and the stress distribution of each point on the corresponding cross section of the permanent magnet rotor. Then the stress analysis is performed on the permanent magnet rotor of the initial structure to obtain the stress distribution information of the permanent magnet rotor of the initial structure under the cross-sectional view.

[0085] In the embodiment, the stress analysis is performed on the permanent magnet rotor of the initial structure to realize the reasonable acquisition of the stress distribution information of the permanent magnet rotor of the initial structure under the cross-sectional view, thereby providing a reliable processing basis for the subsequent geometric shape adjustment.

[0086] In one embodiment, as Figure 4As shown, another structure design method of the permanent magnet rotor is provided, which is applied to a terminal as an example for illustration, including the following steps:

[0087] Step S401, a cross-sectional view of the permanent magnet rotor of the initial structure is obtained.

[0088] Step S402, stress analysis is performed on the permanent magnet rotor of the initial structure to obtain stress distribution information of the permanent magnet rotor of the initial structure under the cross-sectional view.

[0089] Step S403, the target stress value meeting the preset stress threshold condition is determined from the stress distribution information.

[0090] Step S404, according to the structure position information corresponding to the target stress value in the permanent magnet rotor of the initial structure, the contour and cross section of the permanent magnet rotor of the initial structure are adjusted to obtain the permanent magnet rotor of the adjusted structure.

[0091] Step S405, according to the magnetic force information of the permanent magnet rotor of the adjusted structure, the magnetic pole layout of the permanent magnet rotor of the adjusted structure is adjusted to obtain the permanent magnet rotor of the candidate structure.

[0092] Step S406, according to the magnetic field distribution information of the permanent magnet rotor of the candidate structure, the magnetic circuit of the permanent magnet rotor of the candidate structure is adjusted to obtain the permanent magnet rotor of the target structure.

[0093] The structure design method of the permanent magnet rotor can achieve the following beneficial effects: by adjusting the geometric shape of the permanent magnet rotor, the target structure of the permanent magnet rotor can withstand stronger mechanical load, and by adjusting the magnetic field distribution of the permanent magnet rotor, the target structure of the permanent magnet rotor can withstand faster operating speed, realizing the optimization of the material mechanics performance and magnetic performance of the permanent magnet rotor, greatly improving the structural strength and magnetic stability of the target structure of the permanent magnet rotor.

[0094] In order to more clearly illustrate the structure design method of the permanent magnet rotor provided by the embodiments of the present disclosure, the structure design method of the permanent magnet rotor is specifically described below with one specific embodiment. Another structure design method of the permanent magnet rotor is provided, which can be applied to a terminal, specifically including the following contents:

[0095] 1) Improve structural strength: by improving the structure design of the permanent magnet rotor, adopting new geometric shape and optimized material distribution, enhance its mechanical stability in high speed rotation, so as to safely improve the running speed and energy storage capacity of the flywheel energy storage system;

[0096] 2) Enhance magnetic stability: adopt advanced permanent magnet material or improve its magnetic stability in superconducting magnetic field through specific material processing process, ensure the excellent performance of the permanent magnet rotor in low temperature and high magnetic field environment.

[0097] In one embodiment, a permanent magnet rotor is provided, taking the structure design method of the permanent magnet rotor as an example, the permanent magnet rotor comprises a rotor body with a target structure; a target part in the rotor body is trumpet-shaped; the outer diameter of the target part gradually decreases or gradually increases along a preset direction, and the outer diameter of the part in the rotor body other than the target part remains unchanged in the preset direction.

[0098] Specifically, the cross-sectional view of the rotor body with the target structure is shown in FIG. 3(c), and the three-dimensional structure of the rotor body with the target structure can be obtained by rotating the cross-sectional view in FIG. 3(c) by one turn. As shown in FIG. 3(c), one side of the cross-sectional view is a contour with uniform diameter, and the other side (i.e., the target part) of the cross-sectional view is a variable-diameter contour, which is trumpet-shaped. The outer diameter of the target part gradually decreases or gradually increases along a preset direction (such as the horizontal direction), and the outer diameter of the part in the rotor body other than the target part remains almost unchanged in the preset direction (such as the horizontal direction).

[0099] Further, as can be seen from FIG. 3(b) and FIG. 3(c), the stress distribution of the permanent magnet rotor with the target structure is obviously more uniform than that of the permanent magnet rotor with the initial structure, and the stress maximum value of FIG. 3(c) is obviously lower than that of FIG. 3(b). Therefore, the mechanical load bearing capacity and operating speed bearing capacity of the permanent magnet rotor with the target structure are higher than those of the permanent magnet rotor with the initial structure. To further compare the mechanical load bearing capacity of the permanent magnet rotor with the initial structure and the permanent magnet rotor with the target structure, the stress distribution information on the surface of the permanent magnet rotor with the initial structure and the permanent magnet rotor with the target structure is compared. FIG. 5(a) is a surface stress distribution diagram of the permanent magnet rotor with the initial structure, and FIG. 5(b) is a surface stress distribution diagram of the permanent magnet rotor with the target structure. As shown in FIG. 5(a) and FIG. 5(b), the stress distribution on the surface of the permanent magnet rotor with the target structure is obviously more uniform, and the maximum stress value is reduced by 53.9%, which significantly improves the rotation speed threshold of the permanent magnet rotor with the target structure.

[0100] In this embodiment, by setting the target part in the rotor body of the permanent magnet rotor as trumpet-shaped, the target part in the rotor body can bear stronger mechanical load, the material mechanical properties of the permanent magnet rotor are optimized, and the structural strength of the permanent magnet rotor with the target structure is greatly improved.

[0101] It should be understood that although the steps in the flowcharts involved in the embodiments described above are shown in sequence according to the arrows, the steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, the execution of the steps is not strictly limited in sequence, and the steps can be executed in other orders. Moreover, at least some of the steps in the flowcharts involved in the embodiments described above can include multiple steps or multiple stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution order of the steps or stages is not necessarily sequential, but can be alternately or alternately executed with at least part of other steps or steps or stages in other steps.

[0102] Based on the same inventive concept, the embodiments of the present application also provide a structure design device of a permanent magnet rotor for implementing the structure design method of the permanent magnet rotor described above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme described in the above method, so the specific limitations in one or more structure design device embodiments of the permanent magnet rotor provided below can refer to the limitations of the structure design method of the permanent magnet rotor described above, and will not be repeated here.

[0103] In one embodiment, as shown in Figure 6 A structure design device 600 of a permanent magnet rotor is provided, comprising: an information acquisition module 601, a shape design module 602, and a magnetic field design module 603, wherein:

[0104] The information acquisition module 601 is configured to acquire stress distribution information of an initial structure of a permanent magnet rotor.

[0105] The shape design module 602 is configured to adjust the geometric shape of the initial structure of the permanent magnet rotor according to the stress distribution information, to obtain a permanent magnet rotor of an adjusted structure.

[0106] The magnetic field design module 603 is configured to adjust the magnetic field distribution of the permanent magnet rotor of the adjusted structure according to the magnetic force information of the permanent magnet rotor of the adjusted structure, to obtain a permanent magnet rotor of a target structure; wherein the mechanical load bearing capacity and the operating speed bearing capacity of the permanent magnet rotor of the target structure are higher than the mechanical load bearing capacity and the operating speed bearing capacity of the permanent magnet rotor of the initial structure.

[0107] In one embodiment, the shape design module 602 is further configured to determine a target stress value that satisfies a preset stress threshold condition from the stress distribution information; and adjust the contour and cross section of the initial structure of the permanent magnet rotor according to the structure position information corresponding to the target stress value in the initial structure of the permanent magnet rotor, to obtain the permanent magnet rotor of the adjusted structure.

[0108] In an embodiment, the magnetic field design module 603 is further configured to adjust the magnetic pole layout of the permanent magnet rotor of the adjusted structure according to the magnetic force information of the permanent magnet rotor of the adjusted structure, to obtain a candidate structure of the permanent magnet rotor; and adjust the magnetic circuit of the candidate structure of the permanent magnet rotor according to the magnetic field distribution information of the candidate structure of the permanent magnet rotor, to obtain a target structure of the permanent magnet rotor.

[0109] In an embodiment, the structure design apparatus of the permanent magnet rotor 600 further comprises a magnetic circuit adjustment module configured to adjust the magnetic circuit of the candidate structure of the permanent magnet rotor according to the magnetic field distribution information of the candidate structure of the permanent magnet rotor, to obtain an updated structure of the permanent magnet rotor; and if the magnetic stability of the updated structure of the permanent magnet rotor reaches a preset magnetic stability condition, set the candidate structure of the permanent magnet rotor as the target structure of the permanent magnet rotor.

[0110] In an embodiment, the information acquisition module 601 is further configured to acquire a cross-sectional view of an initial structure of the permanent magnet rotor; and perform stress analysis on the initial structure of the permanent magnet rotor, to obtain stress distribution information of the initial structure of the permanent magnet rotor under the cross-sectional view.

[0111] The above various modules in the structure design apparatus of the permanent magnet rotor can be all or partially realized by software, hardware, and combinations thereof. The above various modules can be embedded in or independent of a processor in a computer device in a hardware form, or stored in a memory in the computer device in a software form, so as to be called and executed by a processor to perform operations corresponding to the above various modules.

[0112] In an embodiment, a computer device is provided, which can be a terminal, and an internal structure diagram of the computer device can be as shown in FIG. 8. Figure 7The computer device shown in the figure includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. Among them, the processor, the memory and the input / output interface are connected through a system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capability. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operating system and the computer program in the non-volatile storage medium to run. The input / output interface of the computer device is used to exchange information between the processor and external devices. The communication interface of the computer device is used to communicate with external terminals in a wired or wireless manner. The wireless manner can be realized through WIFI, mobile cellular network, NFC (near field communication) or other technologies. The computer program is executed by the processor to realize a structure design method of a permanent magnet rotor. The display unit of the computer device is used to form a visually visible picture, which can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen. The input device of the computer device can be a touch layer overlaid on the display screen, or a key, trackball or touchpad arranged on the shell of the computer device, or an external keyboard, touchpad or mouse, etc.

[0113] Those skilled in the art can understand that, Figure 7 The skilled in the art can understand that,

[0114] In one embodiment, a computer device is also provided, including a memory and a processor, the memory stores a computer program, and the processor executes the computer program to realize the steps in each method embodiment described above.

[0115] In one embodiment, a computer readable storage medium is provided, which stores a computer program, and the computer program is executed by a processor to realize the steps in each method embodiment described above.

[0116] In one embodiment, a computer program product is provided, including a computer program, and the computer program is executed by a processor to realize the steps in each method embodiment described above.

[0117] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer readable storage medium, and when the computer program is executed, the processes of the above-mentioned embodiments of the methods can be included. Any reference to memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical storage, high-density embedded non-volatile memory, resistive memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration but not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The database involved in the embodiments provided in the present application can include at least one of a relational database and a non-relational database. The non-relational database can include a distributed database based on a block chain, etc., without being limited thereto. The processor involved in the embodiments provided in the present application can be a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., without being limited thereto.

[0118] Any combination of the technical features of the above embodiments can be made. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combination of the technical features does not exist, it should be considered as the scope of the present application.

[0119] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A method of designing a structure of a permanent magnet rotor, characterized by, The method comprises: obtaining stress distribution information of a permanent magnet rotor of an initial structure; adjusting the contour and cross section of the permanent magnet rotor of the initial structure according to the stress distribution information to obtain a permanent magnet rotor of an adjusted structure; adjusting the magnetic field distribution of the permanent magnet rotor of the adjusted structure according to the magnetic force information of the permanent magnet rotor of the adjusted structure to obtain a permanent magnet rotor of a target structure; wherein the mechanical load bearing capacity and operating speed bearing capacity of the permanent magnet rotor of the target structure are higher than the mechanical load bearing capacity and operating speed bearing capacity of the permanent magnet rotor of the initial structure.

2. The method of claim 1, wherein, The adjusting of the contour and cross section of the permanent magnet rotor of the initial structure according to the stress distribution information to obtain a permanent magnet rotor of an adjusted structure comprises: determining a target stress value satisfying a preset stress threshold condition from the stress distribution information; adjusting the contour and cross section of the permanent magnet rotor of the initial structure according to the structure position information corresponding to the target stress value in the permanent magnet rotor of the initial structure to obtain the permanent magnet rotor of the adjusted structure.

3. The method of claim 1, wherein, The adjusting of the magnetic field distribution of the permanent magnet rotor of the adjusted structure according to the magnetic force information of the permanent magnet rotor of the adjusted structure to obtain a permanent magnet rotor of a target structure comprises: adjusting the magnetic pole layout of the permanent magnet rotor of the adjusted structure according to the magnetic force information of the permanent magnet rotor of the adjusted structure to obtain a permanent magnet rotor of a candidate structure; adjusting the magnetic circuit of the permanent magnet rotor of the candidate structure according to the magnetic field distribution information of the permanent magnet rotor of the candidate structure to obtain the permanent magnet rotor of the target structure.

4. The method of claim 3, wherein, The adjusting of the magnetic circuit of the permanent magnet rotor of the candidate structure according to the magnetic field distribution information of the permanent magnet rotor of the candidate structure to obtain the permanent magnet rotor of the target structure comprises: adjusting the magnetic circuit of the permanent magnet rotor of the candidate structure according to the magnetic field distribution information of the permanent magnet rotor of the candidate structure to obtain a permanent magnet rotor of an updated structure; if the magnetic stability of the permanent magnet rotor of the updated structure reaches a preset magnetic stability condition, the permanent magnet rotor of the candidate structure is set as the permanent magnet rotor of the target structure.

5. The method of claim 1, wherein, The obtaining of the stress distribution information of the permanent magnet rotor of the initial structure comprises: obtaining a profile graph of the permanent magnet rotor of the initial structure; performing stress analysis on the permanent magnet rotor of the initial structure to obtain the stress distribution information of the permanent magnet rotor of the initial structure under the profile graph.

6. A structure design device of a permanent magnet rotor characterized by comprising: The device comprises: an information obtaining module configured to obtain stress distribution information of a permanent magnet rotor of an initial structure; a shape design module configured to adjust the contour and cross section of the permanent magnet rotor of the initial structure according to the stress distribution information to obtain a permanent magnet rotor of an adjusted structure; a magnetic field design module configured to adjust the magnetic field distribution of the permanent magnet rotor of the adjusted structure according to the magnetic force information of the permanent magnet rotor of the adjusted structure to obtain a permanent magnet rotor of a target structure; wherein the mechanical load bearing capacity and operating speed bearing capacity of the permanent magnet rotor of the target structure are higher than the mechanical load bearing capacity and operating speed bearing capacity of the permanent magnet rotor of the initial structure.

7. A permanent magnet rotor, characterized by, The application relates to a structure design method for a permanent magnet rotor as claimed in any one of claims 1 to 5, comprising a rotor body as a target structure. A target part in the rotor body is trumpet-shaped; an outer diameter of the target part gradually decreases or gradually increases along a preset direction, and an outer diameter of a part other than the target part in the rotor body remains unchanged in the preset direction.

8. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that, The processor executes the computer program to realize the steps of the method as claimed in any one of claims 1 to 5.

9. A computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to realize the steps of the method as claimed in any one of claims 1 to 5.

10. A computer program product comprising a computer program, characterized in that, The computer program is executed by the processor to realize the steps of the method as claimed in any one of claims 1 to 5.

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