Otimização de um mancal magnético passivo

Abstract

Magnetic bearings are increasingly utilized in industrial applications for its advantages over the mechanical equivalents – especially it's friction free operation. Active magnetic bearings are frequently applied in high speed rotating machines but require complex control systems in order to work properly. Passive magnetic bearings, on the other hand, use permanent magnets in its construction, which simplifies its operation. This work seeks to optimize the dimensions of the magnets that compose a passive magnetic bearing, in order to obtain the smallest possible volume while reaching the desired force value. The Finite Elements method is used to simulate the bearing’s behavior. The procedures used to obtain the optimum configuration of the bearing are determined by the Nelder-Mead and the Hyperbolic Penalty methods. Results obtained through the optimization process are presented.