Fault Diagnosis Way Based on subsection Spectrum zoom analysis by CZT for Squirrel Cage Induction Motors

Among the methods of fault diagnosis based on the current analysis for squirrel cage induction motors (SCIM), the faultspsila characteristic components are often submerged by fundamental component and noises, especially for the broken rotor bars, and how to effectively eliminate the influences of the fundamental component and noises is essential for the diagnosis system. Fault diagnosis way based on subsection spectrum zoom analysis method by CZT for squirrel cage induction motors is proposed in this paper. using subsection spectrum zoom of CZT, the fault current is analyzed to eliminate the effective of power and yawp and to highlight the fault characteristic components.