Transactions of Nanjing University of Aeronautics & Astronautics
Novel Implicit Lorentz Force-Type Magnetic Bearing for High-Precision Agile Maneuver of Magnetically Suspended Gyrowheel
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Abstract:
The lorentz force-type magnetic bearing （LFTMB） with good linearity is suitable for the high-precision deflection control of the magnetically suspended gyrowheel （MSGW）. Two kinds of novel implicit LFTMBs are proposed in allusion to the poor magnetic flux density uniformity of the existing explicit LFTMB. The improvement of uniformity is realized under the paramagnetic contribution of magnetic ring. Their structures are introduced， the mathematical models are established based on the equivalent magnetic circuit method and the magnetic fields are analyzed by the finite element method based on the design parameters. Simulation results indicate that the magnetic flux density uniformity of implicit LFTMBs is superior to the traditional explicit LFTMB. Furthermore， the implicit trapezoid LFTMB with double magnetic circuits is better than that of those with single magnetic circuit， in terms of the magnetic flux density uniformity and the magnetic flux density. The magnetic flux density of implicit trapezoid double magnetic circuits LFTMB is verified by the experiment. The error between the experimental results and the simulation results is within 5%， which shows that the implicit trapezoid double magnetic circuits LFTMB is promising to meet the high-precision agile maneuver requirement of the magnetically suspended gyrowheel.
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Project Supported:
This work was supported by Beijing Municipal Natural Science Foundation （General Program） （No. 3212004） and Cultivation Project of Important Scientific Research Achievements of Beijing Institute of Petrochemical Technology （No. BIPTACF-007）.
Clc Number:
V249.1
CHINA AERO-SCIENCES
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