Title :
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
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;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 2001. IMTC 2001. Proceedings of the 18th IEEE
Conference_Location :
Budapest
Print_ISBN :
0-7803-6646-8
DOI :
10.1109/IMTC.2001.928884
