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Sampling-induced resonance in an encoderless vector-controlled induction motor drive

Ran, L.; Liao, Y.

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Authors

L. Ran

Y. Liao



Abstract

This paper illustrates an effect of sampling in an encoderless vector-controlled induction motor drive with a digital controller. The analysis focuses on the speed observer and the speed control loop which is executed at discrete instants. It is shown that the estimated speed can fluctuate between samples in the speed loop and cause a sustained resonance via feedback. The shaft inertia is not available to smooth the ripple of the estimated speed and the associated resonance could adversely affect the inverter and machine. An analytical model is proposed to evaluate the risk of such a condition in the design and on-site adjustment of control gains. The requirement for a smoothing filter in the speed loop is identified.

Citation

Ran, L., & Liao, Y. (2004). Sampling-induced resonance in an encoderless vector-controlled induction motor drive. IEEE Transactions on Industrial Electronics, 51(3), 551-557. https://doi.org/10.1109/tie.2004.825371

Journal Article Type Article
Publication Date 2004-06
Deposit Date May 27, 2008
Publicly Available Date May 27, 2008
Journal IEEE Transactions on Industrial Electronics
Print ISSN 0278-0046
Publisher Institute of Electrical and Electronics Engineers
Peer Reviewed Peer Reviewed
Volume 51
Issue 3
Pages 551-557
DOI https://doi.org/10.1109/tie.2004.825371
Keywords Digital control, Drives, Induction motors, Observers.

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©2004 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.




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