摘要
针对传统的无刷直流电机转矩控制方案中转矩估算及反电动势观测均存在微分运算误差偏大的问题,为了提高微分运算精度以优化控制转矩,首先提出一种基于高阶滑模微分算法的直接转矩控制新方案。然后在两相静止坐标系下,将采集到的线电压和相电流值作为输入,由高阶滑模微分算法实现对反电动势的观测进而得到转矩估算值。最后在Matlab环境下进行了仿真。结果表明,所提方法使得微分运算保持了较高精度,准确地得到了反电动势及电磁转矩的估算值,实现了高性能的无刷直流电机直接转矩控制。
This paper propose a novel estimate method of direct-torque-control（DTC） based on higher order sliding mode differentiator,in order to improve the accuracy of differential operation and optimize controlling the torque.In conventional brushless DC motor torque control scheme,large deviation of differential operation exists in torque and back electromotive force estimation.In the two-phase stationary coordinate system,we used line voltage and current values as inputs,observed the back electromotive force with high order sliding mode differential algorithm,and then obtained the torque estimations.Finally,we carried out simulation based on Matlab.The results show that using the proposed method,the differential operation maintains a high accuracy,at the same time,and estimations of back electromotive force and electromagnetic torque are accurate,which achieves a high performance brushless DC motor direct torque control.
出处
《计算机仿真》
北大核心
2017年第3期253-257,共5页
Computer Simulation
