A Method for Calculating Orthotropic Material Parameters of Motors

An orthotropic, material parameter technology, applied in computer material science, computer-aided design, calculation, etc., can solve problems such as difficult calculations, and achieve the effect of easy acquisition and error avoidance

Active Publication Date: 2022-07-22
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention is to solve the problem that the existing method is difficult to calculate in the modal analysis of the motor, and now provides a method for calculating the parameters of the orthotropic material of the motor

Method used

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  • A Method for Calculating Orthotropic Material Parameters of Motors
  • A Method for Calculating Orthotropic Material Parameters of Motors
  • A Method for Calculating Orthotropic Material Parameters of Motors

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Experimental program
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specific Embodiment approach 1

[0088] Specific implementation mode 1: refer to Figure 1 to Figure 4 Describing this embodiment in detail, in the method for calculating the orthotropic material parameters of a motor described in this embodiment, since the rotor and the rotating shaft have little influence on the natural frequency, this embodiment only uses the casing, the stator core, the Windings and end caps are the research objects. Therefore, based on the orthotropic analytical model with the shell theory as the core, the research object needs to be equivalent to a cylindrical shell, that is, the shell, the stator core and the winding are equivalent to the shell, and the end caps at both ends are used as the shell. Support structure, that is, the casing, stator core and winding of the motor are equivalent to a tubular structure.

[0089] In order to facilitate the analysis, a cylindrical coordinate system is established with the center of one end face of the tubular structure as the origin O. The X-axi...

specific Embodiment

[0193] In this example, a three-phase permanent magnet synchronous motor with a model of YT-3000-8 is selected as the experimental motor, the rotor and bearings are removed, and only the assembly structure of the casing, stator core, winding and end caps at both ends is selected as the experiment Prototype, hang it with a soft rope, try to ensure that it is in a free state. The excitation point is selected along the prototype body, and the low-order natural frequency is measured by the hammer method. In order to improve the correlation between the acceleration signal and the hammer signal, and reduce the error caused by the interference signal. Using the same point for multiple taps and averaging the transfer function to obtain accurate experimental data (m,n,f 实验 ). Due to the limitation of experimental equipment, only two cases of axial order m=0, 1 can be measured, while the radial order is not limited. In this embodiment, n=2, 3, 4, and 5 are selected.

[0194] Set (0,n,...

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Abstract

A method for calculating orthotropic material parameters of a motor belongs to the field of motors. The present invention is to solve the problem that the existing method is difficult to calculate during the modal analysis of the motor. The method for calculating the orthotropic material parameters of the motor described in the present invention utilizes the orthotropic analytical model with the shell theory as the core, and uses the easily measured low-order radial natural frequency and its corresponding order. As an input condition, the orthotropic material parameters of the motor can be calculated simply and quickly. At the same time, the present invention considers the lamination structure of the stator core of the motor, and avoids the error caused by ignoring the reduction of the axial stiffness; the low-order radial natural frequency and its corresponding order are used as input conditions, which are simple, accurate and easy to obtain.

Description

technical field [0001] The invention belongs to the field of motors. Background technique [0002] The noise of the motor mainly comes from the electromagnetic vibration excited by the radial electromagnetic force wave of the motor. When the spatial distribution of the electromagnetic force wave is consistent with the mode shape of the structural mode, and the frequency of the electromagnetic force wave is close to the modal frequency, there will be more obvious noise. Electromagnetic vibration and noise, so radial electromagnetic force waves and structural modes are two important factors that cause motor vibration and noise. [0003] The calculation of natural frequency is the focus of structural modal research. There are three existing calculation methods, namely experimental test, simulation analysis and analytical calculation. Lots of simulation resources. [0004] When applying the analytical method for modal analysis, most of the existing methods treat the stator cor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23
CPCG06F30/23G06F30/17G16C60/00G06F2119/14G06F2119/10Y02T90/00
Inventor 谢颖李道璐蔡蔚陈鹏
Owner HARBIN UNIV OF SCI & TECH
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