NDLI: Application of linear-phase filters in induction motor speed detection

Content Provider	IEEE Xplore Digital Library
Author	Zhi Gao Turner, L. Colby, R.S.
Copyright Year	2012
Description	Author affiliation: Schneider Electric, Knightdale, NC 27545 USA (Zhi Gao; Turner, L.; Colby, R.S.)
Abstract	In rotor-slot-harmonic-based induction motor speed detection schemes, a motor's rotational speed is resolved from the phase of a rotor slot harmonic signal. In such schemes, frequency-selective digital filters are often applied to attenuate interferences in sampled motor currents before rotor slot harmonic signals are extracted. This paper demonstrates that the use of linear-phase filters, which is a family of digital filters with linear phase responses, helps preserve the rotor slot harmonic signal's phase during the filtering operation. The paper also shows that for induction motors with periodically time-varying loads, the rotor slot harmonic signal's frequency is modulated by periodic speed oscillations, and hence contains multiple sidebands in the frequency spectrum. Experimental results further show that linear-phase filters allows for a more accurate detection of the induction motor speed than filters with nonlinear phase responses.
Starting Page	1314
Ending Page	1321
File Size	566993
Page Count	8
File Format	PDF
ISBN	9781467308021
e-ISBN	9781467308038
e-ISBN	9781467308014
DOI	10.1109/ECCE.2012.6342664
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-09-15
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Induction motors Rotors Harmonic analysis Finite impulse response filter Power harmonic filters
Content Type	Text
Resource Type	Article

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