Optimization Design And Digital Control Of Slice Permanent Magnetic Bearingless Chemical Seal Pump

The salt chemical industry has developed by leaps and bounds.Aiming at the transmission of toxic and harmful substances in the production process of salt chemical industry,this paper proposes a slice permanent magnetic bearingless chemical seal pump system with higher safety performance and more reliable operation performance.In this system,the suspension and torque control,radial suspension forces are uncoupled.There is no need for decoupling control,it has advantages of simple structure,easy to control and control cost is low.Firstly,on the basis of expounding the research background and significance of the subject,this paper introduces the basic structure and working principle of the motor,establishes the mathematical model of radial suspension force by using the equivalent magnetic circuit method,expounds the principle of vector control,and gives the electromagnetic torque equation and motion equation in the rotating coordinate system.Secondly,the main parameters of the motor structure are designed and the three-dimensional model is established by using the finite element analysis software Ansoft Maxwell 16,and the results of simulation analysis verify the correctness and feasibility of the theoretical design.Then,according to the unbalanced vibration of the rotor in the actual operation of the motor,a closed-loop suppression system based on NLMS algorithm and adaptive feed-forward compensation controller is established,and the correctness of the control theory is verified by simulation and experiment with Matlab.Finally,the digital control system based on DSP28335 is designed,and the feasibility of circuit design is proved by the debugging of software CCS 3.3 and hardware circuit.