Dynamic Magnetic Bearing Mechanism And Dc Suspension Test

Power magnetic bearing (namely PMB) is a new type of driving device in the research frontier with high technology, which is advanced in recent years. With such advantages as no friction, no wear, no lubrication, no pollution, long lifetime, etc, PMB can be used in many special occasions as high speed, ultra-high speed, vacuum, and so on. In the fields of army, space, nuclear industry, energy source, chemistry industry, traffic, etc, PMB shows broad application future and important science significance.Research work on the theory in principle and experiment of power magnetic bearing has been done in this thesis. These are the main results:Firstly, on point of the energy exchange in mechanic-electronics, relations among magnetic energy, torque and radial force of PMB are found out. Then parameters as magnetic-flux density, magnetic energy, torque and radial force are analyzed and calculated in detail, and original equivalent circuits are gained.Secondly, integrated control system of PMB is designed in theory and some elementary controlling equations are deduced. Afterward, the system model are simulated in computer and better academic results are obtained. The thesis indicates that both torque and radial force are generated even by using motor's coiling method.Lastly, laboratory program for PMB suspension through DC are advanced. After simple calculation on structural parameters, an experimental mechanical equipment is manufactured. Hereafter, the laboratorial platform is built, and circuits are debugged.The experiment results show that the rotor can be suspended with DC when adopting motor's coiling method, which testifies the feasibility of integrative control by adding AC to windings coiled in this method ,and lay out good foundations for further investigation .