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Papers by K. Karunanithi
indispensable choice for the constant as well as
variable speed applications due to evolution of the
power electronics based sophisticated precise control
systems. On the other hand, they offer consistent
performance in any operating environment with less
maintenance cost. However, faults are inevitable to
occur and usually arbitrary in nature, so the detection
of the faults well in advance is of paramount
importance, especially the ones that can cause severe
damage to the machine. This paper attempts to
simulate the faults utilizing Fast Fourier Transform
and Wavelet signal processing techniques for
analysing the signals and diagnosing the fault
condition. Further it will present that the Wavelets
provide information on the localization of fault and
stand out from the other techniques, especially for
identifying the faults at the start-up of the drive.
Another and most important advantage of Wavelets is
that it diagnoses the fault at incipient level, which helps
in reconfiguration of drive without shut down if load
condition permits. Diagnosis of fault at incipient level
is most sought in process control industries.
Keywords: Fault diagnosis, incipient fault, fault at
start-up, faults under transient condition, external
faults, FFT, and Wavelets.
indispensable choice for the constant as well as
variable speed applications due to evolution of the
power electronics based sophisticated precise control
systems. On the other hand, they offer consistent
performance in any operating environment with less
maintenance cost. However, faults are inevitable to
occur and usually arbitrary in nature, so the detection
of the faults well in advance is of paramount
importance, especially the ones that can cause severe
damage to the machine. This paper attempts to
simulate the faults utilizing Fast Fourier Transform
and Wavelet signal processing techniques for
analysing the signals and diagnosing the fault
condition. Further it will present that the Wavelets
provide information on the localization of fault and
stand out from the other techniques, especially for
identifying the faults at the start-up of the drive.
Another and most important advantage of Wavelets is
that it diagnoses the fault at incipient level, which helps
in reconfiguration of drive without shut down if load
condition permits. Diagnosis of fault at incipient level
is most sought in process control industries.
Keywords: Fault diagnosis, incipient fault, fault at
start-up, faults under transient condition, external
faults, FFT, and Wavelets.