Micro-Magnetic Bearing Motor

• KUROKI Jiro

  東京工業大学大学院

• SHINSHI Tadahiko

  東京工業大学　精密工学研究所

• LI Lichuan

  Xi'an Jiaotong University

• SHIMOKOHBE Akira

  東京工業大学　精密工学研究所

Bibliographic Information

Other Title

• マイクロ磁気軸受モータの研究
• マイクロ ジキ ジクウケ モータ ノ ケンキュウ

Abstract

This paper describes a micro-magnetic bearing (MMB) motor, in which, for the miniaturization, the rotor is supported by a one-axis-controlled magnetic bearing and the axial displacement is measured using capacitance variation between electromagnet cores and the rotor to stabilize the system. To drive the MMB rotor, an induction motor is chosen from the viewpoint of easy-to-integration. The induction motor is designed so that influences of magnetic and electrical interferences on the magnetic stiffness and the accuracy of the measured axial displacement can be reduced. The experimental results for an MMB motor with 6-mm-diameter rotor show that the rotor could levitate and rotate at 10,000 rpm stably. Magnetic stiffness of the MMB in the radial and angular directions were 1.32 N/mm and 0.64 Nm/rad, respectively and vibration amplitude of the rotor in the radial and angular directions were 2.3 μm and 3.5×10^-4 rad at 5,000 rpm, respectively.

Journal

• Journal of the Japan Society for Precision Engineering, Contributed Papers

  Journal of the Japan Society for Precision Engineering, Contributed Papers 72 (5), 662-667, 2006

  The Japan Society for Precision Engineering

Keywords

• magnetic bearing
• induction motor
• capacitive axial displacement sensing

Details

• CRID: 1390001205281870848
• NII Article ID: 110004717819
• NII Book ID: AA11966630
• DOI: 10.2493/jspe.72.662
• ISSN: 18818722
• ISSN: 13488716
• ISSN: 13488724
• NDL BIB ID: 7953374
• Web Site: http://id.ndl.go.jp/bib/7953374
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7953374
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed