Electromechanical interaction in eccentric-rotor cage induction machine equipped with a self-bearing force actuator

Antti Laiho, Kari Tammi, Juha Orivuori, Anssi Sinervo, Kai Zenger, Antero Arkkio

Research output: Contribution to journalArticle in a proceedings journalScientificpeer-review


In this paper, flexural rotor vibration in a two-pole cage induction machine equipped with a built-in force actuator is examined.
The built-in force actuator is based on the self-bearing machine technology in which a supplementary winding is placed in the machine for force production. The built-in force actuator enables active vibration control, but also it enables excitation of the machine for purposes of condition monitoring, for instance. A low-order parametric model is derived for the actuator-rotor system. In the model, the arbitrary eccentric rotor motion is coupled with the voltage-flux equations for the supplementary winding and eccentric rotor cage.
Furthermore, based on frequency-domain system identification, a control method is examined for compensating synchronous rotor vibration. Experimental results are given for a two-pole cage induction motor.
The main contribution of the article is to couple eccentric rotor motion, the built-in force actuator and the mechanical rotor model to obtain a low-order parametric model of the actuator-rotor system which can be applied to control design for rotor vibration suppression.
Original languageEnglish
Pages (from-to)519-529
JournalJournal of System Design and Dynamics
Issue number4
Publication statusPublished - 2009
MoE publication typeA4 Article in a conference publication
Event11th International Symposium on Magnetic Bearings, ISMB-11 - Nara, Japan
Duration: 26 Aug 200829 Aug 2008


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