Fault diagnosis way based on HHT and generalized Fourier transform in induction motor fed with variable frequency power

作者：Liu Zhenxing^*; Li Yuetang; Zhang Wenrong; Zhang Xiongxi

来源：Journal of Tongji University(Natural Science), 2010, 38(12): 1832-1835+1850.

DOI：10.3969/j.issn.0253-374x.2010.12.023

• Constant acceleration
• Constant frequency
• Fault diagnosis
• Fault diagnosis method
• Fault feature
• Frequency signals
• Generalized Fourier transform
• Hilbert-Huang transformation methods
• HilbertHuang transformation
• Operation mode
• Operation model
• Power lines
• Power supply
• Speed regulation
• The generalized Fourier transform
• Time frequency
• Time frequency domain
• Variable frequencies

During the fault diagnosis process of the induction motor fed with variable frequency power, the fault related characteristic components are often submerged by the strong power supply due to the frequency of variability. According to the operation model of constant acceleration and constant deceleration in the speed regulation process, a fault diagnosis method is proposed for identifying the operation mode on the basis of HilbertHuang transformation method (HHT) and time-frequency transforming with the generalized Fourier transform, and the frequency signal of power line can convert to the constant frequency signal of the new time-frequency domain. Simulation shows that the method can highlight the fault features.

• 出版日期2010-12
• 单位武汉科技大学