6533b871fe1ef96bd12d2453

RESEARCH PRODUCT

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

Salvatore NuccioAntonio CataliottiM. Aiello

subject

EngineeringRotor (electric)business.industryBluestein's FFT algorithmFast Fourier transformMotorsMeasure (mathematics)law.inventionHarmonic analysisefficiency estimationInduction motorslawElectronic engineeringElectrical and Electronic EngineeringSpectral resolutionCurrent (fluid)businessInstrumentationInduction motor

description

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).

yearjournalcountryeditionlanguage
2005-10-01
10.1109/tim.2005.854246http://hdl.handle.net/10447/29211