This paper presents a simple mathematical model to determine the force, stiffness and moment parameters in Permanent Magnet (PM) bearings made of radial magnetized ring magnets using Coulombian model and vector approach for five degrees of freedom. MATLAB codesare written to evaluate the bearing characteristics for three translational (x, y and z) and two angular (σ and γ) degrees of freedom of the rotor magnet. The results of the mathematical model are compared with the results of Finite Element Analysis (FEA) using ANSYSand experiments for a PM bearing with one ring pair, thereby the presented mathematical model is validated. Furthermore, th PM bearing with three ring pairs with alternate radialpolarizations is analysed by extending the presented mathematical model and also using ANSYS. Finally, the 5×5 stiffness matrix consisting of principal and cross coupled values ispresented for the elementary structure as well as for the stacked structure with three ring pairs.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering