摘要
采用矢量控制的感应电机在高速运转时,d-q轴之间的电流耦合会削弱转矩控制效果;在采用反馈解耦和前馈解耦进行控制时,去耦控制效果受到电机参数估计误差的影响;该文在交流电机转子磁场定向控制的基础上,考虑到转子磁链的动态性,根据控制理论的不变性原理,把电机给定量和反馈量的偏差用于解耦项的计算,提出一种偏差解耦控制方法用于感应电机的转矩控制,并对算法进行了推导;对几种解耦方式和影响解耦的因素进行了探讨;通过计算机仿真对解耦效果进行了比较,仿真结果表明所提方法具有良好的控制效果。
Coupling between d--q dynamic current impairs the characteristics of torque response in a high--speed operation of vector-- controlled induction motor. The feedback and feed--forward decoopling schemes do not perform well if there existed an error in the motor parameter estimation. Considering the dynamic characteristic of the rotor field and the deviation between initialization and feedback, an deviation decoupling control method of induction motor was proposed, which was based on the AC motor rotor field--oriented control and non-- vary principle of control theory. The mathematical calculation process of above method was given. Different decoupling scheme were studied. The different de-- coupling methods have been compared by computer simulation. The simulation shows the deviation decoupling control method performs better than both feedback and feed--forward decoupling methods.
出处
《计算机测量与控制》
CSCD
2008年第12期1844-1846,1878,共4页
Computer Measurement &Control
基金
国家自然科学基金资助项目(50677015)。
关键词
矢量控制
解耦
反馈解耦
前馈解耦
偏差解耦
Vector control
decoupling
feedback decoupling
feed forward deeoupling
deviation decoupling
