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).

AIELLO M, CATALIOTTI A, & NUCCIO S (2005). An induction motor speed measurement method based on current harmonic analysis with the Chirp-Z Transform. IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, 54(5), 1811-1819 [10.1109/TIM.2005.854246].

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

AIELLO, Massimo;CATALIOTTI, Antonio;NUCCIO, Salvatore
2005

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).
AIELLO M, CATALIOTTI A, & NUCCIO S (2005). An induction motor speed measurement method based on current harmonic analysis with the Chirp-Z Transform. IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, 54(5), 1811-1819 [10.1109/TIM.2005.854246].
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10447/29211
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