Designing, simulations and experiments of a passive permanent magnet bearing

Abstract

This paper presents simulations and experimental results for two types of Passive Permanent Magnet Bearings. The bearing system under investigation consists of two permanent magnet rings opposing to each other in two different configurations. The influence of parameters, such as thickness and radius of permanent magnets, in the force is presented through FEM calculations. Two setups of passive magnetic bearings have been built. Static measurements of radial and axial forces are reported and results compared with simulations. Also, dynamic tests show the behavior of the bearing and the magnitudes of force in the foothold. The results are presented to show trends in the parameters, so the conclusions are applicable for other sizes and applications. As an example, the application as a top bearing for a 12 kW vertical axis wind turbine is considered.

Load Carrying Capacity Enhancing Design and Lubrication Investigation of the Magnetic-Water Double Suspension Elastic Support Thrust Bearing

“…The static parameters of the rubber cushion and magnetic field and the deformation of the pad's working layer are solved using the Finite Element Method (FEM) [28][29][30][31]. By applying the magnetic force as well as the rubber elastic force and moment into the fluid governing equation, the static parameters of the fluid field are solved using the Finite Difference Method (FDM) [32][33][34]. When the convergence condition is reached, the model is solved to obtain the load-carrying characteristics of the MWETB.…”

Eddy currents in a passive magnetic axial thrust bearing for a flywheel energy storage system

“…However, this increases the complexity of the FEM problem since a larger part of the geometry (if not full) must be included if the shaft is rotating off center. As seen in recent publications, the radial orbits for a passive magnetic bearing can vary greatly with rotational speed [13].…”