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

Author

Aiello, M. ; Cataliotti, A. ; Nuccio, S.

Author_Institution

Dipartimento di Ingegneria Elettrica, Palermo Univ., Italy

Volume

1

fYear

2001

fDate

21-23 May 2001

Firstpage

578

Abstract

The paper presents a new method to measure motor speed by means of frequency estimation of rotor slot harmonics present in the supply current of squirrel single cage induction motors. The novelty of the method is the use of Chirp-Z Transform as supply current harmonic analysis. The advantages are an improved spectral resolution and accuracy. Moreover a shorter sampling time window is required reducing errors related to not stationary current signal. Experimental results are presented to validate the proposed method and to perform a comparison with FFT based one

Keywords

Z transforms; angular velocity measurement; frequency estimation; harmonic analysis; induction motor drives; signal resolution; signal sampling; spectral analysis; squirrel cage motors; Chirp-Z transform; DSP computing; air gap flux modulation; current harmonic analysis; frequency estimation; improved accuracy; improved spectral resolution; induction motor speed measurement; rotor slot harmonic; shorter sampling time window; squirrel single cage induction motors; supply current; Chirp; Current measurement; Current supplies; Frequency estimation; Frequency measurement; Harmonic analysis; Induction motors; Rotors; Signal resolution; Velocity measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference, 2001. IMTC 2001. Proceedings of the 18th IEEE

Conference_Location

Budapest

ISSN

1091-5281

Print_ISBN

0-7803-6646-8

Type

conf

DOI

10.1109/IMTC.2001.928884

Filename

928884