A4 Conference proceedings

Power Loss and Temperature Growth in the Backup Bearing of AMB-Supported High-Speed Electric Motor During a Dropdown

Publication Details
Authors: Neisi Neda, Sikanen Eerik, Heikkinen Janne, Sillanpää Teemu, Sopanen Jussi
Publication year: 2019
Language: English
Title of parent publication: Proceedings of the 10th International Conference on Rotor Dynamics – IFToMM
Start page: 144
End page: 156
Number of pages: 13
ISBN: 978-3-319-99261-7
eISBN: 978-3-319-99262-4
JUFO-Level of this publication: 1
Open Access: Not an Open Access publication


This paper presents a simulation model for the dropdown of a high-speed
electric motor utilizing the active magnetic bearings (AMB). In the
circumstance that there is not a sufficient electromagnetic field or the
system experiences excessive load, the rotor drops instantly on the
backup bearings. The dropdown is accompanied by a considerable friction
between the surfaces of the rotor and backup bearings. This study
evaluates the heat generation and thermal behavior of backup bearing
that are essential for the design of AMB systems. The model enables to
calculate the power loss resulted from the friction between the rotor
and backup bearing. The simulation includes the FE-model of the rotor
and the backup bearing model. The one-dimensional thermal network has
been applied to the thermal model of the bearing. The study concentrates
on evaluating the friction heat generated and thermal growth of the
deep groove ball bearing type in the non-drive end of the motor.

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Last updated on 2020-20-03 at 10:03

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