Degradation characteristic trend extraction method of brushless DC motor
A technology of brush DC motor and trend extraction, which is applied in the direction of motor generator testing, electrical measurement, and electrical variable measurement, can solve the problems of lack of life and degradation data, difficult state estimation and life prediction of brushless DC motors, and achieve Running state feature-rich effects
Active Publication Date: 2016-11-16
苏州航大科创发展有限公司
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[0004] The purpose of the present invention is to solve the problem of the lack of life and degradation data of brushless DC motors, and the difficulty in state estimation and life prediction, and proposes a degradation feature trend extraction method based on the analysis of vibration signals of brushless DC motors
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[0024] The present invention is a method for extracting the degradation characteristic trend of a brushless DC motor, the flow chart of which is as follows figure 1 shown. The specific embodiment of method of the present invention is described below in conjunction with accompanying drawing, comprises the following steps:
[0025] Step 1. Install the tested brushless DC motor and test equipment;
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The invention discloses a degradation characteristic trend extraction method of a brushless DC motor. The vibration signals in the operation process of the brushless DC motor are extracted by an acceleration sensor, the vibration acceleration signals act as the motor performance parameters, and the change trend of the vibration acceleration signals is analyzed by the full frequency domain energy mean so as to represent the degradation process of the brushless DC motor. The method comprises the following steps of 1) installation of the tested brushless DC motor and test equipment; 2) acquisition of the vibration signals; 3) EMD decomposition; 4) calculation of the marginal energy spectrum; 5) calculation of the full frequency domain energy spectrum mean; and 6) generation of the degradation characteristic trend.
Description
technical field [0001] The invention relates to a life test technology, in particular to a method for extracting a degradation feature trend of a brushless DC motor. Background technique [0002] Brushless DC motors have good mechanical properties, long life and low noise, so they are widely used in aviation, military, household appliances and other industries. The brushless DC motor is a rotating mechanical device, and its structure contains key mechanical components. During long-term operation, fatigue and wear defects will occur inside, which is one of the main factors leading to the performance degradation and failure of the rotating mechanical system. However, how to perceive the changing law of this performance and the life stage during use is relatively difficult, and with the development of material science and the advancement of technology, the usable life of the product is getting longer and longer. The life test under conventional stress It is also difficult to o...
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IPC IPC(8): G01R31/34
CPCG01R31/343
Inventor 王晓红王立志范文慧宣金泉李大伟
Owner 苏州航大科创发展有限公司
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