Broken bar fault detection using fused DWT-FFT in FPGA platform

This paper proposes a FPGA friendly fused DWT-FFT based technique for broken rotor bar fault detection of induction motor. Discrete wavelet transform is implemented in FPGA platform realizing its time-frequency perseverance quality. The smallest length ‘haar’ wavelet is capable for detecting broken rotor bar fault with a satisfactory level of accuracy. Since haar wavelet is used the computational burden and resource utilization are reduced as compared to others. In addition to that significant reduction in FFT computation to analyze the spectrums of specific band makes this approach very FPGA friendly.