Analysis of demagnetized BLDC Motor using MATLAB Simulink model and AWT analysis

Analysis of the demagnetized permanent magnets in BLDC motor is presented in this paper. Automotive, aerospace, consumer, medical and industrial applications are the fastest growing markets for Brushless DC (BLDC) Motor. BLDC motor has high efficiency, high power density, and low maintenance cost. Still, due to overloading the motor, lots of faults can occur in stator, rotor, bearings and permanent magnets. In this paper, focus has been given on faults in permanent magnets. Modeling of demagnetized BLDC motor is presented using MATLAB/SIMULINK and AWT (Analytic Wavelet Transform) analysis is also done to find time frequency ridges. Test results show that stator current peak increases as magnets are demagnetized.