The Optimization Design Of Standard Disc Permanent Magnet Coupling

Disc permanent magnetic coupling(DPMC)is a joint action equipment based on electromagnetic induction principle,which has many advantages,such as,high efficiency and energy saving.It can transfer the torque without contact and solve the problems of centralization,soft start and overload protection.Meanwhile DPMC is capable of operating at highly corrosive environment.Therefore it is widely used in various industrial fields.The structure parameters optimization and magnetic circuit improvement of DPMC involve many problems,which make the analysis relatively complex.Therefore,the study of DPMC related issue is of great significance.There are five types of disc permanent magnet couplings and the thesis focus mainly on the analytical modeling and structure optimization of standard disc permanent magnet coupling.In order to improve the output torque of DPMC,this thesis conducted the following analysis.Firstly,the thesis established the analytical model of output torque and eddy-current loss for standard DPMC using equivalent magnetic charge method.Design the size of each part according to the formula of the output torque and the related document so that the output torque vary from 0 to 15 N·m.Select materials for each part of standard DPMC and design a prototype according to the operating principles and requirements.Secondly,this thesis built a three-dimensional finite element model in ANSOFT by using the size of the prototype.After defining the material,setting the boundary conditions and dividing grids,this thesis conducted a three-dimensional finite element analysis.In order to verify the accuracy of proposed mathematic model of output torque,magnetic inductive intensity distribution,eddy current loss distribution of copper disc and temperature field distribution of the finite element model for prototype are analyzed and the output torque are also calculated.Thirdly,in order to maximize the output torque of proposed mathematic model in the limited size,this thesis optimized the structure parameters of copper using the optimization algorithm.The optimization start with the introduction of elementary knowledge of related algorithmic.Then optimize the output torque mathematic model using particle swarm algorithm and Global edition Artificial Fish Swarm Algorithm respectively.Comparison between optimized result and output torque of the prototype shows the optimized prototype has a larger output torque and verifies the effectiveness of these two optimization algorithm.At the same time,the structure of the prototype using artificial fish swarm optimization algorithm has better output result.Finally,the standard disc permanent magnet coupling modeling and optimization method is summarized and prospect.