Design, FEM Simulation, and Implementation of a Passive Magnetic Bearing for the Reaction Wheel Actuator

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HOSSEINI S.H.; Mahboobkhah m.; FARHID M.

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Paper Information

Journal: Modares Mechanical Engineering Year:2020 | Volume:20 | Issue:8 Page(s): 2129-2137

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Information Journal Paper

Title

Design, FEM Simulation, and Implementation of a Passive Magnetic Bearing for the Reaction Wheel Actuator

Author(s)

HOSSEINI S.H. | Mahboobkhah m. | FARHID M. | Issue Writer Certificate

Keywords

Passive Magnetic BearingQ1

Magnetic ArraysQ1

Reaction Wheel ActuatorsQ1

Finite Element Analysis (FEM)Q1

Abstract

One of the important challenges of the aerospace industry is the use of magnetic bearings and generating the electromagnetic flux in motor to increase its speed of rotation and angular momentum. In this paper, the Passive Magnetic Bearing for the reaction wheel actuator which is used to modify the status of space satellite is designed and analyzed using the COMSOL software. The performance of constructed reaction wheel in various modes is evaluated. In the Passive Magnetic Bearing system, when the rotor exits the center position of the rotational axis, the return force that results from repulsion between the poles of the same permanent magnet directs the rotor to the center axis position. In the paper, the axial Passive Magnetic Bearing is designed, and the distribution of magnetic flux density and static force of the bearing is estimated using simulation in the software and the stiffness coefficient is obtained from the static properties. To reduce the power consumption of the reaction wheel, various layouts were investigated. Then, based on design and analysis results, the appropriate bearing to achieve the maximum rotational speed and the minimum power consumption is introduced. The results of the FEM analysis clarified the effects of the magnetic stacking structure on the force and magnetic stiffness of the bearing and finally, the experiments proved that the rotational speed and momentum of the reaction wheel are increased in the combined use of the mechanical and Passive Magnetic Bearings.

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