Study On The System Simulation Of The Bearingless Induction Motor & Control Of Axial Magnetic Bearing

A bearingless motor was developed with a rotor which is mounted contact-free. The innovation is that the magnetic forces for the suspension of the rotor are generated in the motor itself and not in separate magnetic bearings. This is achieved by a special winding and an electronic control device. As the bearingless motor is constructed with contact-free bearings, it works free of wear, frictionless, free of abrasion and without lubricants. With the compact construction, low loss and other features, the bearingless motor demonstrates the potential applications in space technology', science research, high vacuum technology and ultra high-speed drives.With more specialties than other motors, the bearingless induction motor acquired a lot of attention in the developing applications of the bearingless drive technology. As the research is proceeded in the beginning, this thesis focuses on the related theory/experiment study of the bearingless induction motor.Firstly, to realize the motor control system, the rudimental principle of the bearingless induction motor is investigated. Through the modeling, the control system of the motor is devised and simulated.Secondly, after an axial magnetic bearing is fully analyzed, an analogue/digital control system is designed and realized to function the magnetic bearing. The results from the experiments suggest the good performance of the magnetic bearing.Thirdly, to improve the performance of the magnetic bearing, control is employed in designing the controller for robust stabilization and disturbance attenuation of the magnetic bearing. By using the hybrid-sensitivity scheme, a controller is devised and implemented in the experiments.