PMSRM模型解耦下的速度控制研究

Study on speed control of PMSRM model decoupling

由于永磁同步磁阻电机(PMSRM)具有功率密度大、调速范围宽、效率高、体积小和质量轻等特点,广泛应用于高功率密度和高可靠性电动作器的设计中。然而在同步坐标系下对电机的磁场电流和转矩电流进行解耦时,无法实现d、q轴电压分别直接控制d、q轴电流。针对此问题提出了在模型中增加相应的控制模块,减化速度电压和互感项,将d-q轴变量进行解耦,各个轴上的分量控制转化为两个相互独立通道控制变量,同时通过电流反馈补偿,设计了速度控制器,将其应用于PMSRM的速度控制中。仿真表明,该速度控制器具有较好的鲁棒性和动态速度控制性能。

The permanent magnet synchronous reluctance motor （PMSRM） is widely applied in the design of electro-mechanical actuator with high-power density and high reliability thanks to its advantages like high power density, wide speed regulating scope, high efficiency, small volume, and small mass. In case of decoupling of the magnetic field and torque current of the motor at the synchronous-frame, it＇ s impossible for d-axial voltage and q-axial voltage to directly control d-axial current and q-axial current respectively. In view of the problem, it＇ s proposed to add corresponding control module in the model, inactivate the speed voltage and mutual inductance, decouple the d-q axial variable, and convert the component control on each axis to the control variable with two independent channels. With the current feedback compensa- tion, the speed controller is designed and applied to control the speed of PMSRM. The simulation result indicates that the speed controller has excellent robustness and dynamic speed control function.