基于滑模控制的改进直接转矩控制算法研究  

Research on Improved Direct Torque Control Algorithm Based on Sliding Mode Control

作　　者：沈毓骏[1] 丰飞 邵瑛[1] SHEN Yujun;FENG Fei;SHAO Ying(Shanghai Technical Institute of Electronics Information School of Electronic Technology and Engineering,Shanghai 201418,China)

机构地区：[1]上海电子信息职业技术学院电子技术与工程学院,上海201418

出　　处：《电工技术》2022年第23期32-35,40,共5页Electric Engineering

摘　　要：传统永磁同步电机(PMSM)直接转矩控制(DTC)是通过滞环控制原理分别对转矩和磁链幅值进行控制的,虽然控制结构简单但存在较大缺点,尤其在低速时转矩难以精准控制,且转矩脉动波动较大。基于此,提出了基于滑模控制的改进直接转矩控制算法,利用二阶滑膜控制基本原理,重新构造磁链和转矩方程。最后通过仿真软件对比传统DTC与基于滑模观测器的改进DTC控制算法,说明设计的控制器具有较好动态性能和抗干扰能力。Traditional direct torque control(DTC)of permanent magnet synchronous motor(PMSM)adopts hysteresis control to control torque and flux linkage amplitude respectively.Although the control structure is simple,there are major shortcomings,especially at low speeds when the torque is difficult to control accurately,and the torque ripple fluctuations are large.In order to solve these problems,the direct torque control algorithm of sliding film control is proposed.The flux linkage and torque are reconstructed by using the basic principle of second-order sliding film control.Finally,by comparing the traditional DTC control algorithm with the sliding mode observer based DTC control algorithm by simulation software,it shows that the designed controller has better dynamic performance and anti-interference ability.

关 键 词：永磁同步 直接转矩 滑模控制 仿真 

分 类 号：TM351[电气工程—电机]