Hybrid-Levitation System Using Permanent And Electromagnet

As a newly-developed technology, magnetic levitation has been used widely in many areas, its further researches are also carried out extensively. One of its succesful applications is magnetic levitation vehicle—a brand-new type of vehicle on the land. For pure Electromagnetic Suspension(EMS) system, great power loss, which would affect the increase of the levitation airgap, cannot be neglected, for all the levitation power must be provided by the current passing throuth the windings of electromagnetic iron. In oder to solve all these problems, hybrid-levitation systems came into research, such as super- and electro-conducting hybrid-levitation system, permenant- and electromagnetic hybrid-levitation system and so on. Though these hybrid-levitation systems have great advantage in saving power and increasing airgap, the control method over them is getting much more difficult and complicated accordingly. In this paper, PID controller problems are tackled in the research of permanent and electromagnet hybrid-levitation system.The research significance of permenant- and electromagnetic hybrid-levitation system are expatiated in this paper. The object is created and analyzed. First, the state-space model and its transition function model of this object are established. After analyzing some of its characteristics, the digital controller PID is designed to ensure its steady levitation. Traditional fixed airgap control are adopted in the design of the PID controller, the state feedback controller are designed by using classical pole collocation method. The simulation result demonstrates that this method meets the needs. The experiment result proves rationality of the experiment console that has been designed, including blending magnetic iron, IV quadrant chopper.And digital controller PID is designed by using TMS320F2812 for its control circuit. Fixed airgap control and current-follow are realized by software.The experiment result proves fixed airgap control of this hybrid-levitation system is absolutly realizable by using digital...