Research On Optimization Of Rotor System For Superconducting Magnetic Levitation Flywheel Of High Energy Storage Density

There are two very obvious trends in the development of energy storage flywheel technology—One trend is to improve high energy storage density,another is to make flywheel lighter.In recent years,many researchers have merged the two trends to form a more advanced energy storage flywheel system that has both the advantages of high energy storage density and light weight.In-depth theoretical study and experimental research on flywheel rotor system,one of the key technologies of high energy storage density flywheel system,has been done.In this paper,according to the main technical indicators such as the energy storage density—300 Wh /kg,the structural size of the flywheel,the rim coating material and its combination method are obtained through the combination of theoretical calculation and ANSYS software analysis.It has solved the relatively inaccurate method that only relied on experience estimation before.The support layout of the flywheel rotor system is analyzed and discussed.The structure layout of the rotor system using superconducting bearings at the lower end and the permanent support at the upper end for auxiliary support is proposed.Based on the theoretical calculation,the suspension force and radial force of the superconducting bearing are verified by the experimental verification,which provides a feasible reference for the design of the superconducting bearing.For the optimization design of the flywheel rotor structure,the mathematical model of the rotor system structure parameters to the critical speed sensitivity is used to determine the rotor optimization target function,and the intelligent algorithm——the hybrid leapfrog algorithm is used to optimize the target function,which greatly reduces the operation.The workload also improves the accuracy of the calculation results.In the process of analyzing the rotor dynamics,ANSYS software was used to simulate and analyze the critical speed and unbalanced response of the rotor,and the correctness of the simulation analysis was verified by experiment to ensure high energy storage.The optimized dynamic characteristics analysis of the density flywheel rotor provides a good idea.The relevant research results provides a better solution for the optimal design of superconducting magnetic levitation flywheel rotor system of high energy storage density,and also provides a preliminary reference program for the construction of the experimental system of superconducting magnetic levitation flywheel of high energy storage density.