Open AccessPower Spectral Density Estimation and THD of Motor Line Currents of AZSPWM Based DTC of Induction Motor Drive
Author(s) -
V. Anantha Lakshmi,
G. Satheesh,
T. Bramhananda Reddy
Publication year - 2018
Publication title -
international journal of engineering and technology
Language(s) - English
Resource type - Journals
ISSN - 2227-524X
DOI - 10.14419/ijet.v7i4.24.21853
Subject(s) - spectral density , total harmonic distortion , induction motor , fast fourier transform , noise (video) , acoustics , harmonic , power (physics) , physics , harmonic analysis , line (geometry) , amplitude , control theory (sociology) , voltage , computer science , electronic engineering , engineering , electrical engineering , mathematics , telecommunications , optics , algorithm , geometry , control (management) , quantum mechanics , artificial intelligence , image (mathematics)
Estimating the power distribution over a given frequency range and the total harmonic distortion of the line currents of the AZSPWM based induction motor drive is discussed in this paper. Applying a spectrum analysis on the motor line currents and inspecting the spectrum amplitudes at different switching frequencies for abnormality is a well-known procedure for acoustic noise detection and diagnosis. Among the spectrum analysis techniques for acoustic noise detection, the Fast Fourier Transform (FFT) is the most widely used technique. There are other spectrum techniques, which are based on the power spectral density (PSD) estimates. AZSPWM based DTC of induction motor currents are estimated for the power spectral densities. The harmonic spectra and the power spectral density estimates of all AZSPWM family are validated through the MATLAB/ simulink environment.