IJSTR >> Volume 9 - Issue 3, March 2020 Edition

[Full Text]

AUTHOR(S)

D Venkata Ramana, P.Chandrasekar, R.Sreedhar

KEYWORDS

Fast Fourier Transform (FFT), Insulated Gate Bipolar Transistor (IGBT), perfect reconstruction (PR), Sinusoidal Pulse Width Modulation technique (SPWM), Variable frequency drive (VFD), Voltage/Frequency (V/F). Wavelet Transform (WT).

ABSTRACT

The advent of Power Electronic Devices capable of handling high currents, aided the design of Variable frequency drive (VFD) with Induction motor or inverter fed induction motor drive, which can be characterized by increased reliability and reduced cost. Though taken care highly, such type of drive system is prone for different kinds of faults. When fault occurs, the drive operation has to be stopped if it is designed for general fault detection. The cost of this schedule can be high, and this justifies the development of incipient fault diagnosis. Finding the fault immediately after it occurs is general method of diagnosing the fault. In this case the damage occurs to component or system. If the fault is detected just before it damages the component or system is much better than general fault diagnosis. i.e. diagnosing the fault at developing stage. It saves the system or component from damage. In turn the cost of damage is reduced. This is called the incipient fault detection. In this paper, general fault detection as well as incipient fault detection using the wavelets has been simulated using MATLAB/SIMULINK package. Simulation results are presented showing both the general fault detection and incipient fault detection using the Wavelets.

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