Design And Simulation Of Maglev Rotor-Bearing System For Discrete Vertical Flywheel Battery

Most of our rural areas, often without power, the flywheel battery can be used to providepower for them, and in developed urban areas, it's very effective to develop an economicaland reliable device and it can store the energy permanently. The flywheel battery can be goodto meet the above requirements, and it is very important to study flywheel battery-powersupply of the economic environment protection in our country. It also has a market in ourcountry, and it also accords with '12 5' plan to put forward the establishment of the resourceconservation and environment friendly green development strategy. Energy storage is aconstraining factor for the electric vehicle commercial, flywheel battery will make electriccars rapid popularization, and the flywheel battery is the best choice for energy storage in thecar, due to its advantages of long life and big power. The development of the flywheel batteryis a long-term process, even though its researchs have made some achievements, and it'simportant to improve persistently, in order to reduce development costs, so it's very necessaryto do the research of flywheel battery. This paper mainly includes four parts as follows:1. Permanent magnetic bearing, radial magnetic suspension bearing and axial magneticsuspension bearing were analyzed with the finite element analysis software ANSYS, and itwas designed to realize the stable suspension of the rotor. It is necessary to do the rotordynamics analysis of the rotor with the purpose of ensuring that the work process of the rotorwon't happen resonance.2. In order to achieve the suspension stability of the rotor, permanent magnetic bearingunloaded off most of the force (about 77%) of the flywheel rotor. Based on stability analysisand configuration analysis and magnetic circuit analysis of the permanent magnetic bearing,the finite element modeling was built. And the results show that the structure design ofpermanent magnetic bearing is able to satisfy actual requirements.3. Axial magnetic suspension bearing just bore the rest force of rotor under the functionof permanent magnetic bearing. According to the electromagnetic force in different clearancecases, the structure of axial magnetic suspension bearing was designed with the magneticcircuit method, and it was analyzed with the finite element analysis software ANSYS. It isconcluded that it can complete the rotor stable suspension with permanent magnetic bearingin the the maximum air gap(2.7mm). There is one innovation point in this chapter: theinfluence of magnetic flux leakage was considered into the correction factor in structure design of the axial magnetic suspension bearing.4. On the basis of the rotor dynamics research method, purpose and the modal analysistheory, the rotor dynamics was researched with the finite element method ,and the modalanalysis was done to optimize the rotor system through the simulation analysis of the rotorwith 12 different parameters, and the above results were verified based on MATLAB. The 9modes of the rotor were considered in the rotor dynamics analysis.