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Stabilization of induction motor drives with poorly damped input filters
KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre. KTH, School of Electrical Engineering (EES), Automatic Control. (System Identification Group)ORCID iD: 0000-0002-1927-1690
2007 (English)In: IEEE transactions on industrial electronics (1982. Print), ISSN 0278-0046, Vol. 54, no 5, 2724-2734 p.Article in journal (Refereed) Published
Abstract [en]

Efficient torque control of induction motor drives in combination with resonant dc-link input filters can lead to a type of stability problem that is known as negative impedance instability. An often-proposed solution to this problem is the nonlinear system stabilizing controller (NSSC). Stability is usually analyzed under the simplifying assumption of perfect torque control. This indicates that the NSSC stabilizes the drive at any operating point. In this paper, however, we show power laboratory experiments where the NSSC stabilization fails. An improved framework for stability analysis and synthesis of stabilization, based on a linear. feedback model of the drive, is therefore proposed. With this approach, effects of time delays can easily be included, and stability margins can be directly established from measurements. To solve the indicated problems with NSSC, a stabilization controller that considers the practical limitations of torque control is derived. In the design of the stabilization controller, the tradeoff between damping and acceptable torque control is also explicitly taken into account. The proposed stabilization scheme is implemented and evaluated on a hardware-in-the-loop simulator as well as in a power laboratory. The results show that the proposed method outperforms the NSSC method.

Place, publisher, year, edition, pages
IEEE , 2007. Vol. 54, no 5, 2724-2734 p.
Keyword [en]
control design, induction motor drives, stability, torque control
National Category
Control Engineering
URN: urn:nbn:se:kth:diva-37086DOI: 10.1109/TIE.2007.899912ISI: 000249841600039ScopusID: 2-s2.0-57849162302OAI: diva2:432024
© 2007 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. QC 20120118Available from: 2012-01-18 Created: 2011-07-28 Last updated: 2013-09-05Bibliographically approved

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