基于滑模变结构矢量控制的异步电机调速

针对异步电机矢量控制系统因电机参数变化和负载波动等因素使调速性能变差的问题,在转差频率控制的异步电机矢量控制系统的基础上,用两个滑模变结构控制器代替传统的PI控制器分别控制d轴和q轴的电流,并采用电压空间矢量技术来调节电机的输入电压,达到调速的目的.仿真结果说明,文中所提出的控制方式与传统的PI控制方式相比较,具有响应速度快,控制精度高,对负载波动和电机参数变化具有较强的鲁棒性.

Asynchronous Motors Speed Control Based on Sliding Mode Variable Structure Vector Control

Two sliding mode variable structure controllers,which displace traditional PI controller to control d-axis and q-axis currents based on slip frequency vector-controlled system of asynchronous motor,have been designed to improve the adjustable-speed performance of vector-controlled systems against motor parameters variations and load disturbances.It adopts voltage space vector technology to control motors input voltage for the sake of speed control.The simulation result shows that this system has the advantages of rapid response and high control precision and robustness to load disturbances and motors parameters variation compared to traditional PI controllers.