Compared to mechanical bearings, active magnetic bearings eliminate friction, resulting in lower energy losses. However, due the magnetization characteristics and high-frequency working of core material bearing, there will be high wind friction loss, eddy current hysteresis loss copper bearing. These losses generate heat increase internal temperature which not only affect control accuracy beari...

To reduce the effect of non-linearity in air gap control active magnetic bearings (AMB). The PID controller for AMB is proposed this study, which optimized with a reformative artificial bee colony (RABC) algorithm. RABC algorithm balances exploitation and exploration capabilities ABC by introducing globally optimal solutions improved food source probabilities. Simulation six benchmark functions...

This paper proposes a closed-loop and implements some metaheuristic optimization approaches to regulate an unstable active magnetic bearing (AMB) system. First of all, hardware model AMB is fabricated in the laboratory. Mathematical analysis carried out linearized open-loop transfer function obtained for equilibrium point operation, using parameters model. Then, closed loop proposed this system...

High-speed and high-power-density drives are attracting much interest in today’s industry, e.g. for applications with mesoscale gas turbine generator systems or turbocompressors for fuel cells. In all high-speed machinery the bearing is a key component. Therefore, this paper presents the analysis of an active magnetic bearing suitable for a permanent magnet machine, being part of a high-speed e...

This paper presents both the dynamic modelling and study of variation certain physical parameters (pole area, gap base current) that change magnetic stiffness a radial heteropolar Rotor Magnetic Bearing (RMB) aiming at analysis magnitude its control current for three different equilibrium points. The RMB is modelled as fully uncoupled symmetric active 8-pole bearing. performed using spectral cu...

Active magnetic bearings require some form of control, based on feedback of the position of the suspended object, to overcome open–loop instability and to achieve targeted system performance by modifying the bearing dynamics. In many applications of magnetic bearings, a need to eliminate discrete position sensors may arise either from economic or reliability considerations. Magnetic bearings wh...