异步电动机具有非线性、强耦合、多变量的性质，要获得良好的调速性能，必须从其动态模型出发，分析异步电动机的转矩和磁链控制规律，研究高性能异步电动机的调速方案。矢量控制就是基于动态模型的高性能的交流电动机调速系统的控制方案之一。所谓矢量控制，就是通过矢量变换和按转子磁链定向，得到等效直流电动机模型，在按转子磁链定向坐标系中，用直流电动机的方法控制电磁转矩与磁链,然后将转子磁链定向坐标系中的控制量经变换得到三相坐标系的对应量，以实施控制。-Asynchronous motor with nonlinear and strong coupling, the nature of the variable, for the good performance of speed adjustment, from the dynamic model must be, based on analysis of asynchronous motor torque and magnetic flux control rule, the high performance of asynchronous motor speed control scheme. Vector control based on dynamic model is of high performance of ac motor drive system is one of the control scheme. The so-called vector control, is through the vector transform and according to the rotor flux, get equivalent for dc model, in the rotor flux coordinate system, with the method to control for dc electromagnetic torque and magnetic chain, then will the rotor flux of the control by the transformation of coordinates get the corresponding amount three-phase coordinate system, in order to implement the control.