Adaptive bias current control in active magnetic bearings for energy optimization

S. Ueno, M.N. Sahinkaya

Research output: Chapter in Book/Report/Conference proceedingOther chapter contribution

1 Citation (Scopus)

Abstract

This paper introduces an adaptive bias current control method for an active magnetic bearing (AMB). The bearing force is analyzed theoretically, and the dynamic performance of the magnetic bearing for various bias currents is discussed. Then power consumption is analyzed and the optimum bias current that minimizes power consumption is derived. A novel optimization method using a steepest descent method is proposed. This requires less computing power than the former optimization method using a recursive Fourier transform algorithm. Experimental results show that the optimized bias current can be achieved by the proposed method. However, the dynamics of the rotor is affected by the bias current variation. In order to overcome this problem, the effects of parameter errors are investigated and correction methods are introduced. Experimental results show that the rotor dynamics are not affected by the variable bias current if the parameters are corrected. Results are also presented for machine run-up and run-down.
Original languageEnglish
Title of host publicationProceedings of the ASME Design Engineering Technical Conference
PublisherASME
Pages955-963
Number of pages9
Publication statusPublished - 2011
EventASME 2011 International Design Engineering Technical Conferences & Computers and Information in Engineering Conference IDETC/CIE 2011 - Washington, DC, USA United States
Duration: 28 Aug 201131 Aug 2011

Conference

ConferenceASME 2011 International Design Engineering Technical Conferences & Computers and Information in Engineering Conference IDETC/CIE 2011
CountryUSA United States
CityWashington, DC
Period28/08/1131/08/11

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  • Cite this

    Ueno, S., & Sahinkaya, M. N. (2011). Adaptive bias current control in active magnetic bearings for energy optimization. In Proceedings of the ASME Design Engineering Technical Conference (pp. 955-963). ASME.