Title :
Flat-top windows for PWM waveform processing via DFT
Author :
Salvatore, Luigi ; Trotta, Amerigo
Author_Institution :
Dipartimento di Elettrotecnica ed Elettronica, Bari Univ., Italy
fDate :
11/1/1988 12:00:00 AM
Abstract :
New flat-top windows for accurate measurement of the parameters that characterise periodic signals are presented. It is shown how, by applying these windows in the frequency domain beyond the FFT, the negative effects of both the spectral leakage and the harmonic interference are reduced without employing interpolation algorithms. The high accuracy of the results is confirmed by an error analysis. These windows are very useful in the determination of the harmonic content of the inverter output PWM waveforms supplying electrical motors, in order to qualify the entire drive
Keywords :
fast Fourier transforms; invertors; pulse width modulation; signal processing; variable speed drives; DFT; PWM invertor drives; PWM waveform processing; electrical motors; error analysis; flat-top windows; frequency domain; harmonic interference; inverter output PWM waveforms; spectral leakage;
Journal_Title :
Electric Power Applications, IEE Proceedings B
