A Lorentz Force Magnetic Bearing Design Method with Composite Magnetic Steel and Superimposed Magnetic Field

作者：Yin Zeng Yuan; Cai Yuan Wen; Wang Wei Jie^*; Ren Yuan

来源：Journal of Astronautics, 2018, 39(7): 760-768.

DOI：10.3873/j.issn.1000-1328.2018.07.007

• Electromagnetic torques
• High power consumption
• High-precision
• Low-power consumption
• Magnetic field uniformities
• Magnetic uniformity
• Magnetic-field intensity
• Main magnetic fields

A new type of Lorentz force bearing design method is proposed based on the superposition magnetic field and composite magnetic steel to solve the problem of the high power consumption and non-uniformity of the working air gap in the existing Lorentz force magnetic bearing. Firstly, the electromagnetic torque model of the traditional Lorentz force magnetic bearing is established, and the corresponding relationship between the power consumption and control precision of the Lorentz force magnetic bearing and its magnetic field performance is revealed. On this basis, the concepts of the average magnetic field intensity and magnetic field uniformity are introduced. The new plan is designed to combine the axial magnetizing magnetic steel with radial block magnetizing magnetic steel creatively. To ensure the circumferential homogeneity of the work air gap, the main magnetic field is generated from the axial magnetizing magnetic steel. The magnetic field mainly accumulates in the work air gap with radial block magnetizing magnetic steel. Compared with the existing magnetic bearing, under the condition of the same size constraint, the magnetic field uniformity of a new magnetic Lorentz force bearing increases by 8.7%, and the magnetic field intensity increases by 51.8%, significantly higher circumferential field continuity. The research results can provide a new technical way to develop high precision magnetic levitation actuator

• 出版日期2018