Computation of the forces acting on a Magnetic Bearing due to Eddy Currents

(2007) Comsol conference — Location: Grenoble, France (23.October.2007)

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Abstract
Forces due to induced current can play a significant role in the behavior of electromagnetic devices. In some case these forces produce a useful effect, like in induction motors, whereas in others they involve non-desired phenomena, like instabilities in magnetic bearings. This paper set out to compute theses forces, first in a simple case, and second on a semi-passive magnetic bearing. Through these two examples, we show the influence of the skin effect on the magnetic field distribution in a conducting part and on the way of modeling these elements by replacing volume currents by equivalent surface currents density in COMSOL software. Finally, modeling results are compared to experimental measurements.
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Kluyskens, V., & Dehez, B. (2007). Computation of the forces acting on a Magnetic Bearing due to Eddy Currents. Comsol conference, Grenoble, France. https://hdl.handle.net/2078.5/51503