تحلیل طیفی توان لحظه ای برای عیب یابی نوار شکسته در موتور القایی قفس سنجابی شش فاز تغذیه با اینورتر

Many researches deal with the detection of broken bar fault in three-phase induction motor, however in high-power applications the multiplication of phases number allows the segmentation of the power on more than three phases which reduces the price of power electronic device and gives greater fault tolerance in open phases. For this reason, it becomes very interesting and demanding to detect faults in case of n>3n>3 phases induction motor. In this study, a novel investigation of broken bar faults in instantaneous power spectrum is presented. The method is based on calculations and frequency analysis of instantaneous six-phase power spectrums when the motor is fed by PWM six-phase IGBT voltage source inverter (VSI). The used model takes into account the geometry and winding layout. The analytical study is confirmed by simulation and experimental results.