摘要
针对异步电机传统直接转矩控制系统存在转矩脉动大、开关频率不固定以及定子磁链观测器准确度对控制性能有较大的影响等问题。文中设计了一种新型的滑模控制器与观测器,并与空间矢量控制相结合,使得系统在交流调速过程中转矩和磁链能够快速且准确地达到期望值,并且基于这种控制器的直接转矩控制系统能够实现逆变器空间矢量调制,达到逆变器开关的恒频输出。通过实验仿真验证了所设计的控制器和观测器能有效地减小稳态误差,且输出较稳定,能使系统具有更高的稳定性和鲁棒性。
In terms of the direct torque control system for asynchronous motor,it has larger torque ripple,unfixed switch frequency and the accuracy of the stator flux observer has a large influence on control performance.In this paper,a new kind of sliding mode controller and observer is designed in the direct torque control system which combined with space vector control.The controller can make the torque and flux reach the expected value quickly and accurately,and the direct torque control system can realize the inverter space vector modulation,then achieved the constant frequency of inverter switch output.Finally,by the simulation results and analysis,the designed controller and observer can effectively reduce the static error,and the output is stable,then it can also make the system have better stability and robustness.
作者
李少龙
唐新雯
李文龙
庄香豫
林峰
陈明月
赵琴
LI Shaolong;TANG Xinwen;LI Wenlong;ZHUANG Xiangyu;LIN Feng;CHEN Mingyue;ZHAO Qin(School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)
出处
《电子科技》
2018年第2期77-80,共4页
Electronic Science and Technology
基金
国家自然科学基金(61205076)
电动叉车控制器的研发(3A16302075)
关键词
异步电机
直接转矩控制
空间矢量控制
滑模控制
观测器
asynchronous motor
direct torque control system
space vector control
sliding mode controller
observer
