An Synergistic Dynamic 2D FEM Model of an Active Magnetic Bearing with Three Electromagnets

Abstract:

This elaboration presents a dynamic model of an Active Magnetic Bearing (AMB) developed in COMSOL Multiphysics. The electromagnetic field is calculated on the basis of Partial Differential Equations (PDEs). The calculated electromagnetic force is applied to the rotor, which is free to move. The Arbitrary Lagrangian-Eulerian (ALE) method for mesh deformation is applied to achieve rotor motion on the bearing plane. The planar rotor motion is described by a set of Ordinary Differential Equations (ODEs) solved in parallel to the electromagnetic field calculations. To enable rotor levitation, three local PD controllers are applied. The mathematical formulas of the control action are coded in the form of COMSOL equations and embedded into the rotor motion ODEs.

• Periodical: Solid State Phenomena (Volume 214)
• Pages: 106-112
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.214.106
• Online since: February 2014
• Authors: Adam Krzysztof Pilat
• Keywords: Active Magnetic Bearing, COMSOL Multiphysics, Control, Dynamic, Electromagnetic Force, Finite Element Method (FEM), Modeling, Simulation

References

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DOI: 10.1109/selm.2013.6562961

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