Stability Prediction Method for Out-of-Plane Vibration of Permanent Magnet Motor Rotating Around Spatial Axis

A technology of stability prediction and permanent magnet motors, applied in the direction of motor generator testing, measuring electricity, measuring devices, etc., can solve problems such as low calculation efficiency, no stability research, and failure to reveal universal laws, so as to improve operation stability Effects on Sex and Reliability

Active Publication Date: 2021-12-07
TIANJIN UNIV
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Problems solved by technology

However, this literature only studies the effect of eccentricity on the dynamic equations, but does not study the problem of stability
[0005] In addition, the existing technology usually uses numerical methods to predict dynamic stability, which has low computational efficiency and cannot reveal universal laws

Method used

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  • Stability Prediction Method for Out-of-Plane Vibration of Permanent Magnet Motor Rotating Around Spatial Axis
  • Stability Prediction Method for Out-of-Plane Vibration of Permanent Magnet Motor Rotating Around Spatial Axis
  • Stability Prediction Method for Out-of-Plane Vibration of Permanent Magnet Motor Rotating Around Spatial Axis

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Embodiment Construction

[0042] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0043] The embodiment of the present invention proposes a highly applicable out-of-plane vibration stability prediction and analysis technology for the permanent magnet motor rotor rotating around the spatial axis. The embodiment of the present invention first establishes the out-of-plane vibration Vibration dynamics model, and then according to the trigonometric function relationship, judge the relationship between the wave number and the number of magnetic poles to obtain the characteristic equations under different combinations, and then solve the imaginary and real parts of the eigenvalues ​​to predict the stability.

[0044] The embodiments of the present invention can be applied...

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Abstract

The invention discloses a method for predicting the out-of-plane vibration stability of a rotor of a permanent magnet motor rotating around a space axis, comprising the following steps: establishing a dynamic model in a follow-up coordinate system; judging the relationship between the vibration wave number and the The combined relationship between the number of permanent magnets, and then the eigenvalues ​​​​of the out-of-plane vibration are classified and calculated; according to the obtained eigenvalues ​​​​of the out-of-plane vibration, the instability law is judged. The invention solves the deficiency that the existing elastic vibration analysis technology is only limited to static or fixed-axis rotating structures, so that the calculation results can better meet the engineering requirements.

Description

technical field [0001] The invention relates to the field of elastic vibration calculation, in particular to a method for predicting the out-of-plane vibration stability of a permanent magnet motor rotor acting on a rotational motion around a space axis. Background technique [0002] Permanent magnet motors are widely used in various engineering fields, such as fans and pumps in industry and agriculture, high-precision servo systems, and hard drive spindle motors. In engineering practice, this type of structure will have significant vibration, noise and stability problems. Due to the limited scope of application of existing dynamic stability analysis techniques, it is particularly necessary to propose an efficient and accurate analysis technique that considers complex actual working conditions. [0003] The literature (Esmaeili M, Durali M, Jalili N. Ring microgyroscope modeling and performance evaluation. Journal of Vibration and Control, 2006, 12(5): 537-553) took the gyr...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/34G06F17/11G06F17/16
CPCG01R31/346G06F17/11G06F17/16
Inventor 王世宇王哲人柳金龙王姚志豪李海洋
Owner TIANJIN UNIV
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