Modeling And Structural Parameter Optimization Of Adjustable Double-sided Permanent Magnet Coupling

At present,fans,pumps and other generic load play an important role in the national economy,which bring great convenience to the production and life of people.However,its electricity consumption is huge.The speed control modes of most of the load are backward,but it can save a lot of energ y to use the variable speed method,a variable speed control mode is adopted by permanent magnet governor,which is based on the magnetic drive technology and has the advantages of simple structure,high reliability,vibration isolation,high efficiency and energy saving,light load start and adapt to the harsh environment.Now,the permanent magnet governor has attracted more and more attention to the high energy consuming enterprises.In this paper,a series of research on the adjustable double-sided permanent magnet eddy-current coupling is carried out in order to find the best parameter combination scheme.The following works are completed mainly:Firstly,a finite element model of adjustable double-sided permanent magnet coupling is built which is suitable for 630KW in ANSYS MAXWELL according to the size parameters of the prototype,The simulation about the 3D magnetostatic and transient electromagnetic field is analyzed,thereby the eddy current distribution,the mechanical characteristic curve,the magnetic field distribution and the torque-slip curve,power loss-slip curve under different coupling area and slip are obtained.Which verify the consistency between the finite element simulation results and the theoretical analysis;Secondly,the relationship between the structural parameters of the adj ustable double-sided permanent magnet coupling and the transmission torque is analyzed,and the main structural parameters are determined considering the theory and the actual situation;Then,in order to reduce the computational cost of subsequent optimization,the nonlinear model between the main structure parameters and the transmission torque is established adopting BP neural network and the support vector machine method respectively.It can be found that the SVM model is better than the BP method comparing the modeling accuracy,computation time and prediction performance,so the adjustable double-sided permanent magnet coupling model is established using the support vector machine method in the subsequent optimization;Finally,it can save the cost and improve the utilization ratio of the permanent magnetic material by matching of structural parameters reasonably,which can meet.the basic performance requirements of the permanent magnet governor.The structural parameters of adjustable double-sided permanent magnet coupling are optimized using intelligent algorithm,the results show that when the structure parameters are optimized by the genetic algorithm and particle swarm algorithm,causing the improved the utilization rate of the permanent magnet torque and the reduced cost.The performance of adjustable double-sided permanent magnet coupling after optimizing is improved,which verify the feasibility and effectiveness of the intelligent algorithm to optimize the structural parameters of adjustable double-sided permanent magnet coupling.