Research

Active recovery of contact-free levitation in magnetic bearing systems


Reference:

Li, P., Sahinkaya, M. N. and Keogh, P. S., 2012. Active recovery of contact-free levitation in magnetic bearing systems. In: ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC/CIE 2012, 2012-08-12 - 2012-08-12.

Related documents:

This repository does not currently have the full-text of this item.
You may be able to access a copy if URLs are provided below. (Contact Author)

Official URL:

http://dx.doi.org/10.1115/DETC2012-70641

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.

Details

Item Type Conference or Workshop Items (Other)
CreatorsLi, P., Sahinkaya, M. N. and Keogh, P. S.
DOI10.1115/DETC2012-70641
DepartmentsFaculty of Engineering & Design > Mechanical Engineering
Research CentresCentre for Power Transmission & Motion Control
RefereedYes
StatusPublished
ID Code37413
Additional InformationPaper No. DETC2012-70641

Export

Actions (login required)

View Item