基于有限元分析的直流电机控制策略

无轴承无刷直流电机集成了直流和交流电机的优点，具有重要的实际应用价值，针对传统悬浮力控制方法存在工作复杂、逆变器通断频繁等缺陷，为了提高磁悬浮力的控制效果，提出了基于有限元分析的无轴承无刷直流电机悬浮力控制策略。首先对无轴承无刷直流电机的结构以及悬浮力产生的原理进行了分析，然后采用有限元分析法对电机转矩和悬浮力进行计算，从而实现无轴承无刷直流电机控制，最后采用Matlab/Simulink工具对其性能进行测试与验证。结果表明，本文策略可以提高转子悬浮的稳定性，能够保证无轴承无刷直流电机的正常运行。

A control strategy for DC motor by using finite element analysis

Bearingless brushless DC motor has the advantages of DC and AC motor, so it has important application value. Aiming at the defects such as complex operation and frequent inverter on-off in traditional suspension force control methods, and in order to improve the control effect of magnetic suspension force, a novel control strategy of the suspension force for bearingless brushless DC motor is presented based on the finite element analysis in this paper. Firstly, structure of bearingless brushless DC motor and the principle of suspension force are analyzed, and secondly, finite element analysis method is used to calculate motor torque and suspension force to control bearingless brushless DC motor, finally, and the performance is tested and verified in Matlab/Simulink. The results show that the proposed strategy can improve the stability of rotor suspension, and can ensure normal operation of bearingless brushless DC motor.