An induction motor speed measurement method based on current harmonic analysis with the Chirp-Z Transform

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55 Citazioni (Scopus)

Abstract

This paper presents a new method to measure motor speed by means of frequency estimation of rotor slot spectral components in the supply current of squirrel single-cage induction motors. The novelty of the method consists in the harmonic analysis of the supply current by means of the chirp-Z transform (CZT). The advantages are improved accuracy due to better spectral resolution and resolvability. Moreover, a shorter observation window is required, thus reducing errors related to nonstationary current signals. The experimental results are presented to validate the proposed method and to make a comparison with a similar method based on the fast Fourier transform (FFT).
Lingua originaleEnglish
pagine (da-a)1811-1819
Numero di pagine9
RivistaIEEE Transactions on Instrumentation and Measurement
Volume54
Stato di pubblicazionePublished - 2005

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Electrical and Electronic Engineering

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