Active recovery of contact-free levitation in magnetic bearing systems

Peichao Li, M. Necip Sahinkaya, Patrick S. Keogh

Research output: Contribution to conferenceOther

2 Citations (Scopus)

Abstract

The use of magnetic bearings allows rotor dynamic systems to be developed for high speed applications, including low pressure/vacuum environments. They provide an alternative to conventional journal, rolling element and gas bearings. The benefits of using magnetic bearings are well documented in terms of low friction operation, together with controllable dynamic characteristics such as stiffness and damping. Magnetic bearings are usually equipped with touchdown bearings to protect the system in cases of power failure, transient loadings, system faults or unexpected influences that may induce system control malfunction. A rotor assembly invariably exhibits residual unbalance due to manufacturing imperfections. The underlying unbalance forces have an influence of the rotor dynamics that arise from contact between a rotor and a touchdown bearing. When considered with the system dynamics, larger unbalance tends to increase the possibility that a rotor will be able to remain in persistent contact with a touchdown bearing. A system has therefore been developed in which the touchdown bearings may be actuated so as to induce the rotor to return to contact-free levitation. This paper provides an assessment of the touchdown bearing motions that will realistically achieve this goal.
Original languageEnglish
Pages673-680
Number of pages8
DOIs
Publication statusPublished - 2012
EventASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC/CIE 2012 - Chicago, IL, USA United States
Duration: 12 Aug 201212 Aug 2012

Conference

ConferenceASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC/CIE 2012
CountryUSA United States
CityChicago, IL
Period12/08/1212/08/12

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  • Cite this

    Li, P., Sahinkaya, M. N., & Keogh, P. S. (2012). Active recovery of contact-free levitation in magnetic bearing systems. 673-680. ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC/CIE 2012, Chicago, IL, USA United States. https://doi.org/10.1115/DETC2012-70641