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Design and Analysis of a Two-Axis-Magnetic Bearing with Permanent Magnet Bias for Magnetically Suspended Reaction Wheel

  • Bangcheng Han
  • Shiqiang Zheng
  • Haitao Li
Conference paper
Part of the Advances in Intelligent Systems and Computing book series (AISC, volume 214)

Abstract

A magnetically suspended reaction wheel (MSRW) for high-precise stabilization of spacecraft attitude is described in this paper. The speed range of the MSFW is from −6000 r/min to 6000 r/min, and angular momentum at normal speed is 30 Nms. A two-axis-magnetic bearing with permanent magnet bias is designed for reducing the power and minimizing the size, etc. The magnetic force, current stiffness, and negative position stiffness are derived by the equivalent magnetic circuit. The nonlinearity of this radial magnetic bearing is shown by using the characteristic curves of force-current-position, current stiffness, and position stiffness considering all the positions of the rotor within the clearance space and the control current. The maximum bearing capacity is given in this paper. The analysis and design method in this paper that can predict all the performance of the radial magnetic bearing with permanent magnet bias can be supplied for the design and analysis of the magnetic bearing wheel system. The errors of current stiffness and position stiffness for the two-axis-active magnetic bearing calculated by the linearized model compared with the FEM method are 5.9 % and 4.5 % respectively. The linearized model is validated by the FEM.

Keywords

Magnetically suspended wheel Two-axis-active magnetic bearing Permanent magnet bias Equivalent magnetic circuit 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Bangcheng Han
    • 1
    • 2
    • 3
  • Shiqiang Zheng
    • 1
    • 2
    • 3
  • Haitao Li
    • 1
    • 2
    • 3
  1. 1.Science and Technology on Inertial LaboratoryBeijingChina
  2. 2.Key Laboratory of Fundamental Science for National Defense of Novel Inertial Instrument and Navigation System TechnologyBeijingChina
  3. 3.School of Instrument Science and Opto-Electronics EngineeringBeijing University of Aeronautics and AstronauticsBeijingChina

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