The paper deals with the spectral monitoring of the instantaneous symmetrical components representing the unbalanced and distorted three-phase voltage and current systems generated by inverters supplying AC motors. It is shown that the spectra of the analytic signals corresponding to the above-mentioned components contain the harmonic symmetrical components of positive, negative, and zero sequence. By using the fast Fourier transform (FFT) in conjunction with suitable windows to process the analytic signals, accurate estimates of the harmonic symmetrical components can be obtained so as to verify the quality of the inverter and, particularly, the degree of unbalance and the distortion factors of the generated waveforms.
FFT-Based Monitoring of Inverter-Fed AC Machines / Dell'Aquila, A; Salvatore, L; Stasi, Silvio. - (1992), pp. 1290-1294. (Intervento presentato al convegno International Conference on Electrical Machines ICEM 92 tenutosi a UMIST Manchester, UK nel September 15-17, 1992).
FFT-Based Monitoring of Inverter-Fed AC Machines
STASI, Silvio
1992-01-01
Abstract
The paper deals with the spectral monitoring of the instantaneous symmetrical components representing the unbalanced and distorted three-phase voltage and current systems generated by inverters supplying AC motors. It is shown that the spectra of the analytic signals corresponding to the above-mentioned components contain the harmonic symmetrical components of positive, negative, and zero sequence. By using the fast Fourier transform (FFT) in conjunction with suitable windows to process the analytic signals, accurate estimates of the harmonic symmetrical components can be obtained so as to verify the quality of the inverter and, particularly, the degree of unbalance and the distortion factors of the generated waveforms.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
