Investigation On The Cage Asynchronous Magnetic Coupler

Cage Asynchronous Magnetic Coupling(CAMC)has the advantages of no mechanical connection,overload protection,low cost,high reliability,adjustable speed,high efficiency and energy saving,and can be used in harsh environments and stable operation.Therefore,the research on CAMC has very important academic value.The main contents of this paper are as follows:1.According to the given technical parameters,preliminary determine the main dimensions of the magnetic coupling,calculation of squirrel cage rotor structure parameters and estimate the volume of the permanent magnet,permanent magnet rotor polar logarithmic and permanent magnet rotor yoke thickness;Then,the preliminary design parameters are verified by finite element method,and the influence of various parameters on the working performance of CAMC is analyzed by finite element method.2.The Taguchi method and RBF neural network are employed for multi-objective optimization design of CAMC.The experimental orthogonal matrix is established by Taguchi method,the approximate optimal value of the optimization target is determined by the average value analysis and the Two structural parameters that have great influence on the optimization target are selected by analysis of variance.The optimal values of the selected structural parameters are obtained by the radial basis neural network approximation function after training.By comparing the performance before and after optimization with finite element method,the validity of the proposed design method,which is a valuable reference to the analysis design and optimization of the CAMC.3.The operation of CAMC is to transmit torque through electromagnetic induction.The induced current in the guide bar causes the internal temperature of the coupler to rise.The high temperature will cause the permanent magnet to irreversibly demagnetize,Therefore,it is necessary to accurately calculate the temperature distribution of each component of the CAMC.Therefore,the CAMC three-dimensional temperature field model was established to analyze the temperature field of magnetic couplers with the method of magnetic-thermal bidirectional coupling,calculate and analyze the temperature distribution of each component,and study the temperature distribution under the operation of different slip speeds,providing a reference for preventing the squirrel cage rotor bar break fault or permanent magnet demagnetization fault caused by the overheating of magnetic couplers.4.The squirrel cage and compound solid asynchronous magnetic couplers with the same structural parameters were compared.The current density vector distribution,mechanical characteristics and torque increase rate,temperature characteristics,speed regulation characteristics and torque fluctuation are compared and analyzed,which can provide reference for the application of squirrel cage structure and compound solid structure.