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Mechanical thrust bearings in high - speed rotation of serious wear and tear , the life is very short and can not meet the requirements of modern high - speed rotating machinery , in order to solve this problem , this article is based on magnetic levitation technology , designed maglev thrust bearing electromechanical structure and digital control system , and suspension test . Axial Magnetic bearings are generally composed by the the electromechanical structure detection unit and control system , according to actual needs , respectively its design . Electromechanical structure design is an important part of the development of the entire system , mechanical design and machining precision , directly affect the maglev control of the thrust bearing accuracy , and can even determine the success or failure of the development of Axial Magnetic Bearings . This article based on the actual needs of the design Axial Magnetic Bearings mechanical dimensions , air gap , bias current , number of turns , coil carry current , diameter and other relevant parameters . The displacement sensor is the most important feedback element of the whole system , the chosen displacement sensor detection accuracy and real-time directly affects the performance of the control system , magnetic levitation thrust bearings with non -contact , high sensitivity , large linear range , good stability good anti-jamming performance advantages . This paper based on the actual need , select the eddy current displacement sensor designed circuit , after a pilot test to meet the requirements of the control system . Axial Magnetic Bearings mathematical model after linearization , can not be accurately the true state of the reaction system , PID control algorithm does not require the controlled object has a precise mathematical model , has strong applicability and flexibility , so this paper PID control algorithm , using MATLAB simulation of PID control algorithm , and the experiments carried out on the basis of the simulation results , to achieve a stable suspension of Axial Magnetic Bearings , laid the foundation for further study .
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