基于新型趋近律的PMSM超扭曲滑模直接转矩控制  

PMSM Super-Twisting Sliding Mode Direct Torque Control Based on New Approach Law

作　　者：仉毅[1] 闻振璇 张兴军 王亮[1] ZHANG Yi;WEN Zhen-xuan;ZHANG Xing-jun;WANG Liang(Shandong University of Science and Technology,Qingdao 266590,China;Shandong Energy Group Shandong New Julong Energy Co.,Ltd.,Heze 274900,China)

机构地区：[1]山东科技大学,青岛266590 [2]山东能源集团山东新巨龙能源有限责任公司,菏泽274900

出　　处：《微特电机》2018年第10期75-78,共4页Small & Special Electrical Machines

基　　金：国家自然科学基金项目(51674155);教育部创新团队发展计划(IRT_16R45)

摘　　要：针对传统永磁同步电机的直接转矩控制(PMSM-DTC)系统中转矩脉动过大、转速响应慢等问题,采用空间矢量脉冲调制技术(SVPWM),研究了一种基于新型趋近律的超扭曲(Super-Twisting)滑模控制方法。该方法将转矩和磁链作为被控对象,通过引入饱和函数sat(s)代替传统的滞环比较器的方式,提高了系统的转速响应和转矩抗干扰能力。仿真结果表明,改进后的PMSM-DTC系统的转速响应减小了0. 06 s,转矩脉动减小了50%,系统对负载扰动和参数变化等不确定性有较好的鲁棒性。A new approach based on Super-Twisting sliding mode control was proposed and space vector pulse modula tion(SVPWM)was adopted to overcome the problems such as excessive torque ripple and slow response of the speed in the direct torque control(PMSM-DTC)system of the traditional permanent magnet synchronous motor.This method uses the torque and flux linkage as the controlled object.By introducing a saturation function sat(s)to replace the traditional hyster esis comparator,the system's speed response and torque anti-interference ability were improved.The simulation results show that the speed response of the improved PMSM-DTC system was reduced by 0.06 s and the torque ripple was reduced by 50%.The system is robust against uncertainties such as load disturbances and parameter changes.

关 键 词：永磁同步电机 超扭曲 滑模控制 饱和函数 

分 类 号：TM351[电气工程—电机] TM464