关键词: 异步电动机, 频谱分析, 谐波含量, 故障诊断

Abstract:

Aiming at the problem that the traditional method causes the equipment shutdown in the application of fault diagnosis of induction motor,the diagnosis and maintenance are not timely, not in place and maintenance is too frequent,blind maintenance and other problems affect the production operation. A fault diagnosis method based on current harmonic analysis was proposed. The current signal was collected for denoising processing and spectrum analysis without affecting the operation of the induction motor. The higher harmonics were obtained and normalized. Deterioration criteria were compared to make corresponding fault diagnosis. The experiment was validated and analyzed.The results show that this method can effectively judge the fault cause and fault degree of induction motor,and is of great significance to maintain production stability,reduce accidents and reduce costs.

Key words: induction motor, spectrum analysis, harmonic content, fault diagnosis