Three Phase Induction Motor Inverter Defects Diagnosis Using Voltage Spectrum of an Auxiliary Winding

Abstract

In this paper, a new technique for diagnosing faults in three phase voltage inverter feeding induction motor is presented. It is based on the so-called the voltage spectrum of an auxiliary winding. For this purpose, expression of the inserted winding voltage is presented. After that, discrete Fourier transform analyzer is required for converting the voltage signal from the time domain to the frequency domain. Simulation results curried out for non defected and defected inverter show the effectiveness of the proposed method.

Diagnosis of induction motor failures using discrete wavelet transform of an auxiliary winding voltage

“…Monitoring this signal is extremely beneficial to achieve an efficient diagnosis of the squirrel cage induction machine [24], [25]. This technic was applied previously for a wound rotor induction machine [26], [27]. The mathematical model of the squirrel cage induction machine fed by an inverter is presented in [17].…”

Squirrel cage induction motor fault diagnosis using lissajous curve of an auxiliary winding voltage: case of broken bars

“…Therefor, this technic will be extremely beneficial. It was applied previously for a wound rotor induction motor [24], [25]. The method is built considering that a small coil inserted in stator part forming an angle 𝜃 0 with the A stator phase as shown in Figure 1.…”