五自由度无轴承永磁同步电机非线性动态解耦控制  

Nonlinear Dynamic Decoupling Control for 5 Degree-of-Freedom Bearingless Permanent Magnet Motor

作　　者：徐荣[1] 诸德宏[1] 卢立户[1] 

机构地区：[1]江苏大学电气与信息工程学院,江苏镇江212013

出　　处：《电机与控制应用》2013年第3期37-43,共7页Electric machines & control application

摘　　要：针对五自由度无轴承永磁同步电机这一强耦合性系统,提出一种最小二乘支持向量机(LSSVM)α阶逆模型构建及其解耦控制方法。在给出了三自由度交直流磁轴承悬浮力方程和径向两自由度无轴承永磁同步电机转矩力、径向力方程基础上,建立了电机的五自由度状态方程。在分析系统可逆的情况下,将LS-SVM的非线性逼近能力与逆系统方法的解耦线性化相结合,对五自由度无轴承永磁同步电机进行解耦控制。仿真结果表明,使用该控制方法能使系统稳定运行,并且能够实现五自由度无轴承永磁同步电机各自由度之间的解耦控制,且具有良好的动静态性能。A decoupling control method based on the least squares support vector machine（LS-SVM） a -th order inverse system method was proposed by analyzing the 5 degree-of-freedom （DOF） bearingless permanent magnetic synchronous motor（BPMSM） , which was a nonlinear and high coupling system. The radial-axial forces equations of 3 DOF magnetic bearing and the electromagnetic torque equation also the radial forces equations of the 2 DOF BPMSM were given, then the state equations of 5 DOF BPMSM were set up. The feasibility of decoupling control based on inversed system method for the 5 DOF BPMSM was discussed in detail, in order to keep effectively control with the 5 DOF PMSM, the proposed method has combined the nonlinear approximation ability of the LS-SVM with decoupling linearization of inverse system method. The simulation results showed that this kind of control strategy could realize dynamic decoupling among the every radial degree of 5 DOF BPMSM, and the whole control system had good dynamic and static performance under this control method.

关 键 词：五自由度 无轴承 永磁同步电机 解耦控制 

分 类 号：TM301.2[电气工程—电机]