Active axial-magnetomotive force parallel-airgap serial flux magnetic bearings

W K S Khoo, Karuna Kalita, Seamus D Garvey, R Hill-Cottingham, D Rodger, J Fred Eastham

Research output: Contribution to journalArticlepeer-review

16 Citations (SciVal)


The maximum force capability of conventional active magnetic bearings is limited since the magnetic flux density in the iron is limited due to saturation. We introduce in this paper a new concept of active magnetic bearings that exploits high bearing force from a number of parallel ironless stator and permanent-magnet rotor discs. We optimized the design of the bearing by solving tens of thousands of finite-element models in nested loops. We commissioned an experimental rig comprising a set of interleaved bearing discs and a 3 degrees-of-freedom mechanical platform to verify its force production capability.
Original languageEnglish
Pages (from-to)2596-2602
Number of pages7
JournalIEEE Transactions on Magnetics
Issue number7
Publication statusPublished - Jul 2010


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