无轴承交流电机的非线性自适应状态反馈线性化控制研究

The bearingless induction motor which combines the induction motor and magnetic bearing, is a great breakthrough in recent years of research field of the high speed electrical machinery. It has important meanings to improve high speed drives performance and to reduce its weight and volume. Not only can it be used in the fields such as centrifugal pump, air blower, spindle and flywheel energy storage system, it can also accord with the development demands of high reliability, small volume, long life of new generation aviation electrical machinery used in the more-electric or all-electric fighter plane and helicopter. The main influencing factor of application is its control system design has not well been solved yet. .In research of this project, the linearizing decoupling control of electromagnet torque and radial suspension force, and the stable suspension are realized by the air gap motor flux field oriented vector controller which offered a kind of effective method for nonlinear control design of bearingless induction motor. On this basis, an adaptive air gap motor flux field oriented vector controller is proposed to realize the stable operation under the condition of rotor time constant variation with temperature change and magnetic saturation. An innovative permanent magnet biased radial axial combination magnetic bearing and an innovative bearingless induction motor system with five-axis magnetic suspension is designed, and the stable suspension of this innovative system is realized also. This innovative system can shorten the axial length to the maximum extant, increase the axial utilization ratio of the motor. Its structure is simpler and is easy to integration and modularity.Main performance index of this innovative bearingless motor system: steady or dynamic operation at 150-3000rpm, given the condition of rotor not accurately proofread by dynamic balancer. The axial displacement and radial displacement are smaller than 60μm and 40μm respectively，the rotor speed regulation error is smaller than 1rpm..The overall research of bearingless motor is at primary stage at present, there are few research results transformed to practical in the world. The research of this project has undoubtedly settled solid foundation for the application of this innovative bearingless motor system, and has filled the domestic gaps. The evaluation committee thinks that the research of this project has very important meanings to the improvement of research levels in the field of high speed drives and aviation plane of our country, and to shortening the disparity of this research fields with developed country. The research results are the internal originating, and belong to the internal leading standard. Among them the innovative bearingless induction motor system with five-axis magnetic suspension and adaptive air gap motor flux oriented vector control strategy proposed in accordance with the rotor time constant variation are the initial proposition in the world, this research reaches the international most advanced level..

无轴承交流电机是高速电机研究领域的一项重大突破。针对其强耦合、多变量、参数变化的非线性系统特性，运用非线性状态反馈线性化控制方法来实现该系统的动态解耦和精确线性化：在此基础上运用非线性自适应状态反馈线性化理论为主来设计其考虑参数变化的高品质控制系统，以期在目前发展的起步阶段，抓住机遇，为这项高新技术走向实用打下基础。