An FFT-based novel approach to noninvasive speed measurement in induction motor drives

Author

Ferrah, Azzeddine ; Bradley, Keith J. ; Asher, Greg M.

Author_Institution

Dept. of Electr. & Electron. Eng., Nottingham Univ., UK

Volume

41

Issue

6

fYear

1992

fDate

12/1/1992 12:00:00 AM

Firstpage

797

Lastpage

802

Abstract

A novel sensorless speed detection method based on the fast Fourier transform (FFT) spectral analysis is described. The main concern is the extraction of the speed information contained in the rotor slot-ripple harmonics created in the airgap of the induction motor using digital signal-processing techniques. A nonintrusive all-digital speed detector suitable for steady-state operation has been designed around an Intel/80386-based microcomputer equipped with a 80387 coprocessor. The detector performance with and without load over a wide range of speeds is described

Keywords

computerised instrumentation; electric drives; fast Fourier transforms; harmonic analysis; induction motors; microcomputer applications; satellite computers; signal processing; signal processing equipment; spectral analysis; velocity measurement; 80387 coprocessor; FFT; Intel/80386-based microcomputer; airgap; all-digital speed detector; digital signal-processing; fast Fourier transform; induction motor drives; noninvasive speed measurement; rotor slot-ripple harmonics; sensorless speed detection; spectral analysis; steady-state operation; Coprocessors; Data mining; Detectors; Fast Fourier transforms; Induction motors; Microcomputers; Rotors; Spectral analysis; Steady-state; Velocity measurement;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.199410

Filename

199410