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Flat-top windows for PWM waveform processing via DFT

Flat-top windows for PWM waveform processing via DFT

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IEE Proceedings B (Electric Power Applications) — Recommend this title to your library

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© The Institution of Electrical Engineers
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New flat-top windows by which per forming the 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.

Inspec keywords: invertors; signal processing; pulse width modulation; variable speed drives; fast Fourier transforms

Other keywords: PWM invertor drives; PWM waveform processing; flat-top windows; DFT; electrical motors; inverter output PWM waveforms; harmonic interference; frequency domain; error analysis; spectral leakage

Subjects: Power convertors and power supplies to apparatus; Signal processing and detection; Other numerical methods

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