基于逆系统方法的无轴承异步电动机解耦控制

Decoupling Control of the Bearingless Induction Motor Based on Inverse System Method

针对新型五自由度无轴承异步电动机这一多变量、非线性、强耦合的系统,采用逆系统的方法进行解耦控制。首先介绍了五自由度无轴承异步电动机的工作原理,分别给出混合磁轴承和无轴承异步电动机的力学方程,并建立电机状态方程。然后根据状态方程分析系统的可逆性,应用逆系统方法实现径向力与转矩力之间、径向力之间的动态解耦。最后由线性综合方法设计系统模型的闭环控制器。仿真结果表明,系统具有良好的动态和静态性能。

A decoupling control approach based on inverse system has been used for the innovative five degree-of-freedom bearingless induction motor, which is muhi-variable, nonlinear and high coupling. To start with, the working principles of the innovative five degree-of-freedom bearingless induction motor was briefly introduced. Then the mechanical equations of three degree-of-freedom magnetic bearing and two degree-of-freedom bearingless induction motor were given. Also the state equations of the motor were set up. Secondly, the reversibility of system based on the mechanical equations was discussed. Using inverse system, the control between radial force and electromagnetic torque force and radial forces control were decoupled. Last but not least,the controllers were designed respectively according to the linear system theory. The simulation results showed that the whole control system had a good dynamic and static performance.