Induction Motor Fault Diagnosis based on Single-phase Power Spectrum Analysis
Feixiang Meng · Large Electric Machine and Hydraulic Turbine · 2011
In stator current spectrum of induction motor,fault frequency component of rotor broken bar is very small and its frequency is close to basic wave,so it is difficult to obtain fault characteristic.According to this disadvantage,it adopts single-phase power spectrum analysis,digital filter and specified spectrum to project fault characteristic.Simulation results show that fault characteristic frequency component in single-phase power spectrum can be reflected adequately,even when rotor broken bar characteristic is tiny.The more the broken bars are,the larger the amplitude of fault characteristic component is.This method is advantageous with wealthy fault information,high sensitivity and low sample resolving-power requirement.It is feasible to apply in motor fault diagnosis.