Title :
Current harmonic detection for induction motor speed sensorless control using fast orthogonal search
Author :
Nutt, K. ; Tarbouchi, M. ; McGaughey, D. ; Chikhani, A.
Author_Institution :
Dept. of Electr. Eng., R. Mil. Coll. of Canada, Kingston, Ont., Canada
Abstract :
This paper describes the design of an improved method of detection of harmonic current components in AC machines. A fully digital implementation of the speed estimator requires the use of DSP routines to perform a spectral analysis of the sampled current waveform and extract harmonic information. Conventional methods using Fast Fourier Transforms (FFTs) are limited by the frequency resolution and the minimum number of samples required to obtain this resolution. The Fast Orthogonal Search (FOS) alleviates these restrictions, which makes it suitable for use in this type of application.
Keywords :
functional analysis; harmonic analysis; induction motors; machine control; parameter estimation; search problems; signal sampling; velocity control; AC machines; DSP routines; current harmonic detection; fast orthogonal search; fully digital implementation; harmonic current components; induced stator currents; induction motor speed sensorless control; sampled current waveform; spectral analysis; speed estimator; AC machines; AC motors; Amplitude estimation; Frequency estimation; Induction motors; Power harmonic filters; Rotors; Sampling methods; Sensorless control; Stators;
Conference_Titel :
American Control Conference, 2002. Proceedings of the 2002
Print_ISBN :
0-7803-7298-0
DOI :
10.1109/ACC.2002.1025263
