Simulation analysis method for carbon fiber wrapped motor rotor and storage medium

Abstract

The invention relates to a carbon fiber wrapped motor rotor simulation analysis method, which comprises the following steps: establishing a motor rotor three-dimensional model which comprises a rotor core and a carbon fiber layer wrapping the periphery of the rotor core; performing geometric cleaning on the three-dimensional model of the motor rotor; establishing a motor rotor finite element model based on the motor rotor three-dimensional model; the magnitude of interference of a contact interface between a rotor core and a carbon fiber layer of the motor rotor finite element model is set; and applying a design load to the motor rotor finite element model for finite element analysis, and outputting a stress analysis result and a deformation analysis result of the motor rotor finite element model. The invention further provides a storage medium. According to the simulation analysis method provided by the invention, the design strength of the carbon fiber wrapped motor rotor can be evaluated more accurately and more fully, the trial-manufacture and test times of the motor rotor can be effectively reduced, the development period of the motor rotor can be shortened, and the research and development cost and the production cost of the motor rotor can be effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a simulation analysis method and storage medium for a carbon fiber wrapped motor rotor. Background Art

[0002] In the design process of electric motors, simulation analysis is a common method for evaluating whether the motor rotor structural strength meets the standards. For example, the patent application with publication number CN117494522A shows a method for designing and analyzing a motor rotor assembly.

[0003] However, the widely used motor rotor simulation analysis solutions usually have the following technical problems: they often ignore the impact of the carbon fiber wrapping process on the motor rotor structural strength, and lack an accurate simulation method for this impact, resulting in a large deviation between the simulation analysis results and the actual situation when the structural strength simulation analysis of the motor rotor wrapped with carbon fiber is performed. This deviation directly affects the effectiveness of the simulation analysis results, forcing engineers to increase the number of trials and tests during the development of the motor rotor to verify whether the design meets the requirements. This additional verification process has an adverse impact on the development cycle, R&D cost and production cost of the motor rotor. Summary of the invention

[0004] The purpose of the present invention is to provide a carbon fiber wrapped motor rotor simulation analysis method and storage medium to alleviate or eliminate at least one of the above-mentioned technical problems.

[0005] A carbon fiber wrapped motor rotor simulation analysis method according to the present invention comprises the following steps: S1: establishing a three-dimensional model of a motor rotor, wherein the three-dimensional model of the motor rotor includes a rotor core and a carbon fiber layer wrapped around the outer periphery of the rotor core; S2: performing geometric cleaning on the three-dimensional model of the motor rotor; S3: Establishing a finite element model of the motor rotor based on the three-dimensional model of the motor rotor; S4: setting the interference of the contact interface between the rotor core and the carbon fiber layer of the motor rotor finite element model; S5: applying a design load to the motor rotor finite element model to perform finite element analysis, and outputting stress analysis results and deformation analysis results of the motor rotor finite element model.

[0006] Optionally, the S3 includes the following steps: meshing the three-dimensional model of the motor rotor, assigning material properties and setting connections between components to establish a finite element model of the motor rotor.

[0007] Optionally, in S3, anisotropic material constitutive simplified modeling is adopted for the carbon fiber layer and the rotor core.

[0008] Optionally, the S4 further includes the following steps: Extracting the contact force between the rotor core and the carbon fiber layer of the motor rotor finite element model; The contact force is compared with the contact surface pressure in the coating process of the carbon fiber layer, and the interference is adjusted according to the comparison result.

[0009] Optionally, the extracting of the contact force between the rotor core and the carbon fiber layer of the motor rotor finite element model includes the following steps: performing a statics solution on the contact interface between the rotor core and the carbon fiber layer of the motor rotor finite element model; and extracting the contact force from the statics solution result file.

[0010] Optionally, after S5, the following steps are also included: judging whether the structural strength of the motor rotor finite element model meets the requirements based on the stress analysis results and the deformation analysis results; if the structural strength of the motor rotor finite element model does not meet the requirements, returning to adjust the motor rotor three-dimensional model and / or the motor rotor finite element model and re-performing finite element analysis until the structural strength of the motor rotor finite element model meets the requirements.

[0011] Optionally, if the structural strength of the motor rotor finite element model meets the requirements, sample preparation and verification is performed based on the motor rotor finite element model.

[0012] Optionally, the design load includes centrifugal load and temperature load.

[0013] Optionally, filling glue and magnetic steel are provided in the rotor core.

[0014] The present invention further proposes a storage medium on which a computer program is stored. The computer program is executed by a processor to implement the carbon fiber wrapped motor rotor simulation analysis method as described in any one of the above items.

[0015] The simulation analysis method proposed in the present invention can more accurately and fully evaluate the design strength of the carbon fiber wrapped motor rotor, can effectively reduce the number of motor rotor trial production and testing, help shorten the motor rotor development cycle, and can effectively reduce the motor rotor R&D cost and production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a flow chart of the simulation analysis method of carbon fiber wrapped motor rotor described in some embodiments; Figure 2 is a schematic diagram of a three-dimensional model of a motor rotor described in some embodiments; Figure 3 is a schematic diagram of a finite element mesh of a rotor punching described in some embodiments; Figure 4 It is a schematic diagram of the operation of simplified constitutive modeling using anisotropic materials described in some embodiments; Figure 5 It is a schematic diagram of the operation of setting the interference amount of the contact interface between the rotor core and the carbon fiber layer of the motor rotor finite element model described in some embodiments; Figure 6 It is a schematic diagram of the operation of solving static mechanics described in some embodiments; Figure 7 It is a schematic diagram of the operation of extracting contact force from the static solution result file described in some embodiments. DETAILED DESCRIPTION

[0017] The following will describe the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention.

[0018] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0019] like Figure 1 A carbon fiber wrapped motor rotor simulation analysis method is shown, comprising the following steps: S1: Figure 2 As shown, a three-dimensional model of the motor rotor is established, and the three-dimensional model of the motor rotor includes a rotor core 10 and a carbon fiber layer 20 wrapped around the outer periphery of the rotor core 10; S2: Perform geometric cleaning on the motor rotor 3D model; S3: Establish a finite element model of the motor rotor based on the three-dimensional model of the motor rotor; S4: Figure 5 As shown, the interference amount of the contact interface between the rotor core and the carbon fiber layer of the motor rotor finite element model is set; S5: Apply the design load to the motor rotor finite element model to perform finite element analysis, and output the stress analysis results and deformation analysis results of the motor rotor finite element model.

[0020] By adopting the above technical solution, the interference of the contact interface between the rotor core and the carbon fiber layer of the motor rotor finite element model is set before the finite element simulation analysis of the motor rotor finite element model, which can better simulate the influence of the carbon fiber coating process on the force of each component of the motor rotor, and fully consider the influence of the carbon fiber coating process on the strength analysis of the motor rotor. It can more accurately and fully evaluate the design strength of the carbon fiber wrapped motor rotor, effectively reduce the number of motor rotor trial production and testing, help shorten the development cycle of the motor rotor, and effectively reduce the research and development cost and production cost of the motor rotor.

[0021] In specific implementation, a three-dimensional model of the motor rotor can be established in a three-dimensional modeling software such as SolidWorks, CATIA or Creo. Subsequently, these models can be imported into CAE simulation software such as Ansys or HyperWorks to establish a finite element model of the motor rotor and perform simulation analysis.

[0022] Specifically, S3 includes the following steps: meshing the three-dimensional model of the motor rotor, assigning material properties and setting connections between components, and establishing a finite element model of the motor rotor.

[0023] In some embodiments, in order to improve computational efficiency, when constructing the three-dimensional model of the motor rotor (such as in step S3), an anisotropic material constitutive simplified modeling method is used for the carbon fiber layer and the rotor punching multilayer materials of the rotor core. Specifically, Figure 3 and Figure 4 As shown in the figure, this method makes special treatment for the carbon fiber layers and the multi-layered structure of the rotor core, giving them anisotropic material properties. For the remaining parts in the three-dimensional model of the motor rotor, simpler isotropic material properties are used to further improve the calculation efficiency.

[0024] In some embodiments, in S4, after setting the interference of the contact interface between the rotor core and the carbon fiber layer of the motor rotor finite element model, the following steps are also included: Extract the contact force between the rotor core and the carbon fiber layer of the motor rotor finite element model; The contact force is compared with the contact surface pressure during the coating process of the carbon fiber layer, and the interference is adjusted according to the comparison result.

[0025] By adopting the above technical solution and combining the coating process of the carbon fiber layer to adjust the interference, the setting of the interference can be more matched with the actual carbon fiber layer coating process, so that the setting of the interference is more accurate, thereby achieving more accurate and more comprehensive simulation analysis. The interference can be calibrated according to the surface pressure and contact force of different carbon fiber coating processes, so that the carbon fiber wrapped motor rotor simulation analysis method has a wider range of application.

[0026] Specifically, extracting the contact force between the rotor core and the carbon fiber layer of the motor rotor finite element model includes the following steps: Figure 6 As shown in the figure, the contact interface between the rotor core and the carbon fiber layer of the motor rotor finite element model is statically solved; the contact force is extracted from the static solution result file, such as Figure 7 As shown, after performing the statics solution, the contact force can be extracted at the contact interface 60 between the rotor punching 50 and the carbon fiber layer 20 .

[0027] In some embodiments, after S5, the following steps are also included: judging whether the structural strength of the motor rotor finite element model meets the design requirements based on the stress analysis results and the deformation analysis results; if the structural strength of the motor rotor finite element model does not meet the design requirements, returning to adjust the motor rotor three-dimensional model and / or the motor rotor finite element model and re-performing the finite element analysis until the structural strength of the motor rotor finite element model meets the design requirements. The above technical solution can achieve the optimal design of the motor rotor. When adjusting the motor rotor three-dimensional model and / or the motor rotor finite element model, the material property parameters and connection relationship parameters of each component of the motor rotor can be adjusted.

[0028] Furthermore, if the structural strength of the motor rotor finite element model meets the design requirements, sample preparation and verification are performed based on the motor rotor finite element model.

[0029] In some embodiments, the design loads include centrifugal loads and temperature loads.

[0030] In some embodiments, Figure 2 As shown, a filling glue 40 and a magnetic steel 30 are arranged in the rotor core.

[0031] The present invention further proposes a storage medium on which a computer program is stored. The computer program is executed by a processor to implement the carbon fiber wrapped motor rotor simulation analysis method as described in any one of the above items.

[0032] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or changes made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention. In the description of this specification, the description of reference terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics of the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

Claims

1. A simulation analysis method for a carbon fiber wrapped motor rotor, characterized in that: The following steps are involved: S1: establishing a three-dimensional model of a motor rotor, wherein the three-dimensional model of the motor rotor includes a rotor core and a carbon fiber layer wrapped around the outer periphery of the rotor core; S2: performing geometric cleaning on the three-dimensional model of the motor rotor; S3: Establishing a finite element model of the motor rotor based on the three-dimensional model of the motor rotor; S4: setting the interference of the contact interface between the rotor core and the carbon fiber layer of the motor rotor finite element model; S5: applying a design load to the motor rotor finite element model to perform finite element analysis, and outputting stress analysis results and deformation analysis results of the motor rotor finite element model.

2. The carbon fiber wrapped motor rotor simulation analysis method according to claim 1 is characterized in that: The S3 comprises the following steps: meshing the three-dimensional model of the motor rotor, assigning material properties and setting connections between components to establish a finite element model of the motor rotor.

3. The carbon fiber wrapped motor rotor simulation analysis method according to claim 2 is characterized in that: In S3, anisotropic material constitutive simplified modeling is adopted for the carbon fiber layer and the rotor core.

4. The carbon fiber wrapped motor rotor simulation analysis method according to claim 1 is characterized in that: The S4 further comprises the following steps: Extracting the contact force between the rotor core and the carbon fiber layer of the motor rotor finite element model; The contact force is compared with the contact surface pressure in the coating process of the carbon fiber layer, and the interference is adjusted according to the comparison result.

5. The carbon fiber wrapped motor rotor simulation analysis method according to claim 4 is characterized in that: The extracting of the contact force between the rotor core and the carbon fiber layer of the motor rotor finite element model comprises the following steps: Performing a static mechanics solution on the contact interface between the rotor core and the carbon fiber layer of the motor rotor finite element model; Extract contact forces from static solution result files.

6. The carbon fiber wrapped motor rotor simulation analysis method according to claim 1 is characterized in that: The step S5 also includes the following steps: judging whether the structural strength of the motor rotor finite element model meets the requirements based on the stress analysis result and the deformation analysis result; if the structural strength of the motor rotor finite element model does not meet the requirements, returning to adjust the motor rotor three-dimensional model and / or the motor rotor finite element model and re-performing finite element analysis until the structural strength of the motor rotor finite element model meets the requirements.

7. The carbon fiber wrapped motor rotor simulation analysis method according to claim 6 is characterized in that: If the structural strength of the motor rotor finite element model meets the requirements, sample preparation and verification are performed based on the motor rotor finite element model.

8. The carbon fiber wrapped motor rotor simulation analysis method according to claim 1 is characterized in that: The design load includes centrifugal load and temperature load.

9. The carbon fiber wrapped motor rotor simulation analysis method according to claim 1 is characterized in that: Filling glue and magnetic steel are arranged in the rotor core.

10. A storage medium having a computer program stored thereon, characterized in that: The computer program is executed by a processor to implement the carbon fiber wrapped motor rotor simulation analysis method as described in any one of claims 1 to 9.

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