高功率密度磁悬浮高速电机转子动力学建模与分析

Modeling and analysis of rotor dynamics of high-power density maglev high speed motor

与传统电机相比,高功率密度磁悬浮高速电机的运用范围越来越大。但由于转速的提高,转子在加速或减速过程中跨越临界转速会导致共振现象,因此为避免共振带来的问题,需对转子进行动力学建模及分析。以12.3 kW高功率密度磁悬浮高速电机转子系统为研究对象,建立基于有限元法的动力学模型,并对其进行模态计算,使用Ansys Workbench进行模态仿真。通过B&K敲击试验对高功率密度磁悬浮高速电机转子进行模态分析,与基于有限元法的模态计算结果和Ansys Workbench模态仿真结果进行对比。结果表明:3种方法数据较为吻合,其建立的动力学模型有足够的准确性。

Compared with traditional motors,high-power density maglev high-speed motors have a wider and wider range of applications,but due to the increase of speed,the rotor crosses the critical speed during acceleration or deceleration,which will lead to resonance phenomenon,so in order to avoid the problems caused by resonance,it is necessary to dynamically model and analyze the rotor.a dynamic model based on the finite element method is established and modal calculated based on a 12.3 kW high-power density magnetic levitation high-speed motor rotor system,and modal simulation is performed using Ansys Workbench.The B&K percussion test was used to analyze the modal analysis of the rotor of the high-power density magnetic levitation high-speed motor,and compare it with the modal calculation results based on the finite element method and the Ansys Workbench modal simulation results.The results show that the data of the three methods are consistent,and the kinetic model established has sufficient accuracy.