中文说明：三相异步电机矢量控制matlab仿真，系统的控制部分由给定、PI调节器、函数运算、二相/三相坐标变换、PWM脉冲发生器等环节组成。 其中给定环节有定子电流励磁分量im*和转子速度n*。放大器G1、G2和积分器组成了带限幅的转速调节器ASR。 电流电压模型转换由函数Um*、Ut*模块实现。函数运算模块ws*根据定子电流的励磁分量和转矩分量计算转差s， 并与转子频率想加得到定子频率1，再经积分器得到定子电压矢量转角。模块sin、cos、dq0/abc实现了二相旋转坐标系至三相静止坐标系的变换 dq0/abc是输出是PMW发生器的三相调制信号，因为调制信号幅度不能大于1，在dq0/abc输出后插入衰减环节G4。 在模型调试时，可以先在此处断输出和PMW发生器的三相调制输入信号幅值小于1的要求，计算G4的衰减系数。
English Description：
Matlab simulation of three-phase induction motor vector control system, the control part of the system is composed of given, PI regulator, function operation, two-phase / three-phase coordinate transformation, PWM pulse generator and other links. The given link includes the excitation component im * of stator current and the rotor speed n *. The amplifier G1, G2 and integrator constitute the speed regulator ASR with limiting amplitude. The current voltage model conversion is realized by the function um * and ut * modules. The function operation module WS * calculates the slip s according to the excitation component and torque component of the stator current, and adds the stator frequency 1 to the rotor frequency, then obtains the stator voltage vector angle through the integrator. Modules sin, cos and dq0 / ABC realize the transformation from two-phase rotating coordinate system to three-phase static coordinate system. Dq0 / ABC is the three-phase modulation signal of PMW generator, because the amplitude of modulation signal can not be greater than 1, the attenuation link G4 is inserted after dq0 / ABC output. When debugging the model, the attenuation coefficient of G4 can be calculated by breaking the requirement that the amplitude of output and three-phase modulation input signal of PMW generator is less than 1.