Full Content is available to subscribers

Subscribe/Learn More  >

Magnetic Relevitation of Flywheel Rotor With High Speed Backward Whirl

[+] Author Affiliations
Guangyoung Sun

Samsung Techwin R&D Center, Sungnam, Gyeonggi, Korea

Paper No. IMECE2012-85049, pp. 817-824; 8 pages
  • ASME 2012 International Mechanical Engineering Congress and Exposition
  • Volume 4: Dynamics, Control and Uncertainty, Parts A and B
  • Houston, Texas, USA, November 9–15, 2012
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4520-2
  • Copyright © 2012 by ASME


In this paper, the magnetic relevitation is conducted for a flywheel rotor rotating at 40,000 rpm in contacts with auxiliary bearings through numerical simulations. The high-speed flywheel rotor loses the magnetic suspensions and touches down onto the auxiliary bearings. Then, active magnetic bearings (AMB) relevitate the flywheel rotor in whirling and bouncing motion when the magnetic power is restored. To achieve this rotor dynamics control in challenge, three control algorithms are utilized and their performances are compared based on the steady-state response with respect to a bearing reference center and the power loss of AMBs required for the relevitation as the friction coefficient on rotor/auxiliary bearing contacts. The simulation results show that the sliding mode control (SMC), which is robust to dynamic uncertainty and nonlinear dynamics, is superior to the conventional linear controllers such as the PD and the LQR in the control performance and efficiency. Furthermore, the SMC successfully relevitates the flywheel rotor with a high-speed backward whirl, while the linear controllers fail to do.

Copyright © 2012 by ASME
Topics: Flywheels , Rotors , Whirls



Interactive Graphics


Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In