无轴承异步电机的非线性逆解耦控制  

Nonlinear Inverse Decoupling Control of Bearingless Induction Motor

作　　者：王正齐[1] 刘贤兴[1] 周静伟[1] 陈明易[1] 

机构地区：[1]江苏大学电气信息工程学院,江苏镇江212013

出　　处：《控制工程》2011年第6期970-973,976,共5页Control Engineering of China

基　　金：国家自然科学基金资助项目(60674095);江苏省自然科学基金(BK2008233);江苏省普通高校研究生科研创新计划资助项目(CX10B_268Z)

摘　　要：针对无轴承异步电机多变量、非线性和强耦合的特点,采用基于逆系统理论的控制方法对其进行解耦控制。首先简要介绍了无轴承异步电机的基本原理,推导出电机旋转部分和径向悬浮力的数学模型。然后对转矩绕组采用非线性逆解耦控制。而径向悬浮控制所需的转矩绕组气隙磁链值可以在逆解耦控制的基础上通过系统辨识获取,从而实现转子的稳定悬浮。最后进行系统综合和仿真研究。研究表明,非线性逆解耦控制方法不仅能实现无轴承异步电机悬浮力和旋转力之间的解耦,而且能实现电机转速和转子磁链之间的动态解耦。To the bearingless induction motor system with multi-variable, nonlinearity and high coupling, the control method based on inverse system theory is used to realize the decoupling control. The principle of the bearingless induction motor is expounded briefly, and the mathematic models of radial suspension force and the rotation part of motor are deduced. Then the nonlinear inverse decoupling control is used for the torque windings. And the stable levitation can be assured by using the air gap flux linkage of motor winding of the radial levitation controller, which is obtained by system identification. The simulation reeuhs show that the nonlinear inverse decoupling control method can realize the decoupling control between torque and suspension forces of the bearingless induction motor, and the dynamic decoupling between speed and rotor flux of the motor.

关 键 词：无轴承异步电机 非线性逆解耦 悬浮力 

分 类 号：TP27[自动化与计算机技术—检测技术与自动化装置]