Title :
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
fDate :
12/1/1992 12:00:00 AM
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;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
