Characteristic Analysis And Optimal Design Of Axial Flux Permanent Magnet Eddy Current Coupler

Axial flux permanent magnet eddy current coupler is a new type of transmission device based on the principle of electromagnetic induction,which has been used in electrical,mechanical,chemical and water treatment fields.In order to further improve the transmission performance of the coupler and reduce the cost of manufacturing,the characteristic analysis and optimization design of the axial magnetic flux permanent magnet eddy current coupler are carried out in this paper.The research mainly focuses on the analytical model,finite element modeling,characteristic analysis,and optimization design of the axial flux permanent magnet eddy current coupler.Firstly,through the analysis of the parameter structure and working principle of the permanent magnet coupler;according to the analysis theory of the permanent magnet eddy current field,it is necessary to deal with the equivalent assumptions of the coupler,and establish the corresponding equivalent three-dimensional linear analytical model,and then establish the corresponding equivalent according to the corresponding assumptions.The mathematical model is analyzed using this model to theoretically analyze the electromagnetic torque and eddy current loss of the axial flux permanent magnet eddy current coupler,and the formulas of electromagnetic torque,eddy current density and axial force are deduced in combination with the corresponding interface conditions.Secondly,the influence of different structural parameters of the magnetic coupler on the transmission performance is analyzed.Using the obtained analytical formula,a coupler model that meets the expected performance is preliminarily designed,and the SOLIDWORKS software is used to draw the structure diagram of the permanent magnet coupler.Through 3D simulation,the distribution characteristics of magnetic induction intensity and current density are obtained,the relationship between each structural parameter and electromagnetic torque,eddy current density and axial force is drawn,and the change trend of each curve is analyzed;According to the relationship diagram,the electromagnetic torque formula is deduced,and the value range of the optimal permanent magnet pole pair number is obtained.Thirdly,this paper uses the Magnet finite element analysis software to simulate and analyze the mechanical characteristic curve of the axial magnetic flux permanent magnet eddy current coupler.According to the mechanical characteristic curve of the coupler,its working conditions under various working conditions are analyzed,and the stable operating range and unstable operating range of the axial magnetic flux permanent magnet eddy current coupler are obtained.The dynamic characteristics under constant torque load conditions are simulated and analyzed.Finally,the transmission torque per unit volume around the magnetic coupler is larger,the material utilization rate is higher,and the production cost is lower,and the multi-objective optimization design of the magnetic coupler is carried out.The inner and outer diameter of the permanent magnet,the magnetization height of the permanent magnet and the thickness of the copper conductor are determined as the optimization variables,and the electromagnetic torque and the cost of the coupler are the optimization goals.Using Matlab software to design and realize multi-objective optimization program design,realize multi-objective optimization of axial magnetic flux permanent magnet eddy current coupler based on improved genetic algorithm.The optimization results show that the electromagnetic torque and cost have been significantly improved compared with those before optimization.Simulation analysis verifies the validity,rationality and reliability of the coupler permanent magnet pole pair calculation method and the multi-objective optimization method.There are 45 figures,6tables,and 62 references in this paper.