Title :
Detection of speed oscillation in induction motor drives using the instantaneous stator power
Author :
Ghassemzadeh, Majid ; Trzynadlowski, Andrzej M. ; Legowski, Stanislaw F.
Author_Institution :
Dept. of Electr. Eng., Nevada Univ., Reno, NV, USA
Abstract :
Oscillation of speed in an induction motor drive indicates mechanical imperfections and/or vibration in the drive system. For the purpose of noninvasive diagnostics, analysis of the power spectrum of stator current is usually employed for the detection of speed oscillation. In this paper, another medium, namely the instantaneous stator power, is investigated. It is shown that the power spectrum of instantaneous stator power contains the so-called characteristic component directly at the frequency of oscillation. Theoretical analysis and supporting results of laboratory experiments are presented
Keywords :
electric current measurement; induction motor drives; oscillations; power measurement; stators; velocity measurement; induction motor drives; instantaneous stator power; mechanical imperfections; noninvasive diagnostics; speed oscillation detection; vibration; AC motors; Admittance; Frequency; Induction motor drives; Induction motors; Laboratories; Rotors; Stators; Vibrations; Voltage;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 1996. APEC '96. Conference Proceedings 1996., Eleventh Annual
Conference_Location :
San Jose, CA
Print_ISBN :
0-7803-3044-7
DOI :
10.1109/APEC.1996.500472
