Author:

Keywords:

1SH5924N#57050928, LMSD, LMSD_Aerospace, LMSD_Model

Abstract:

A mathematical framework is developed to characterise the dynamic behaviour of a flywheel system supported by permanent magnetic bearings (PMBs). An equivalent spring-damper model is introduced to represent the PMBs and validated using electromagnetic finite element (FE) simulations. Subsequently, the PMB model is integrated into a rotor dynamic model of the flywheel system to study the rotor response. Low stiffness of the PMBs results in a low critical rotor speed. Operating above this speed effectively reduces rotor displacement amplitude and transmitted vibrations. A sensitivity analysis illustrates how the stiffness and damping characteristics of the permanent magnetic suspension can be tuned to minimise the vibration emission.