摘要
集旋转与悬浮于一体的无轴承异步电机是一个非常复杂的非线性系统,电磁转矩与径向悬浮力的非线性解耦是实现电机稳定悬浮运行的基础.为了降低控制系统对电机参数的依赖程度,本文采用定子磁场定向控制,同时为了克服此方法在低速时的不足,应用U-I法和I-ω法相结合观测定子磁通和气隙磁通,在matlab/simulink中构造了定子磁场定向控制的无轴承异步电机矢量控制系统.仿真结果表明:实现了电磁转矩与径向悬浮力之间的解耦,验证了此方法的有效性.
The bearingless induction motor, which combines magnetic levitation bearings with the drive winding, is an extremely complicated nonlinear system. The nonlinear decoupling control of electromagnet torque and radial levitation force is the basis of the stable operation of bearingless induction motor. In order to reduce the motor＇s dependence on parameter, the stator flux oriented control was used. Meanwhile, in order to overcome the insufficiency in the low speed time, the U-I law and the I-ω law were unified to detect stator flux and air-gap-flux. Based on the stator flux oriented control, the vector control system of bearingless induction motor was structured in matlab/simulink. Simulation results showed that the electromagnet torque and the radial levitation force were decoupled,and the validity of this method was confirmed.
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2007年第5期34-38,共5页
Journal of Hunan University:Natural Sciences
基金
湖南省自然科学基金资助项目(04JJ3007)
关键词
无轴承异步电机
磁悬浮
磁通观测
定子磁场定向
bearingless induction motor
magnetic levitation
magnetic flux detecting
stator flux orientation
