流体类负载下的异步交流电动机速度反推控制

针对流体类负载的特点,提出一种基于非线性控制策略的反推控制,实现了速度闭环控制.根据异步电动机在按转子磁场定向的M-T旋转坐标系上的数学模型和矢量控制原理,得出了定子励磁电流分量、定子转矩电流分量和电机转速的方程,并以这3个方程为基础,结合反推控制原理,设计出了速度反推控制算法.通过MATLAB仿真看出,使用该控制算法可以很好地实现跟踪给定速度,使流体类负载有很好的稳定性能.

Reverse control of asynchronous AC motor speed under fluid loading

according to the features of the fluid loading, the paper provided a non-linear control strategy reverse control to have a speed closed circuit control. According to the mathematics model of the M - T rotary coordinate series along the direction of rotor magnetic field and the vector principle of the asynchronous AC motor, the paper obtained the equations of the stator excitation current component, the stator torque current component and the motor speed. Base on the three equations and in combined with the reverse control principle, the paper designed the calculation method of the speed reverse control. From the MATLAB simulation, the application of the control calculation method can be well to have a rated speed of the tracking to ensure the fluid loading have a good stable performance.