摘要
针对传统永磁同步电机(PMSM)直接转矩控制系统低速运行磁链观测不精确、转子位置估计存在相位延迟等问题,设计了适用于全速度域的磁链观测器,并利用锁相环(PLL)技术改进了传统转子位置估计方法。提出了基于PI控制器的多模型组合磁链观测器,实现了电阻在线估计和直流偏移补偿;利用锁相环技术设计了基于复变陷波器的转子位置估计结构;最后,通过仿真和实验证明了提出的新型PLL结构能够有效地滤除观测反电势中的谐波成分,提高了转子位置估计精度。
The inaccuracy estimation of the flux linkage and the phase delay of the rotor position estimation affect the dynamic performance in the traditional permanent magnet synchronous motor(PMSM)direct torque control(DTC)system.To improve the rotor position estimation,a new rotor position method based on the phase-locked loop(PLL)was proposed.Firstly,a multi-model combined flux linkage observer based on the PI controller was designed.Secondly,a new rotor position estimation method based on the complex notch filter was designed.Finally,the simulations and the experiments were implemented to compare the performances of the proposed rotor position estimation method and the traditional method.The results show that the proposed PLL can eliminate harmonics in the estimated back EMF and improve the accuracy of the estimated rotor position.
作者
周硕
ZHOU Shuo(Department of Mechanical and Electronic Engineering,Guidaojiaotong Polytechnic Institute,Shenyang 110023,Liaoning,China;School of Information Science&Engineering,Northeastern University,Shenyang 110004,Liaoning,China)
出处
《电气传动》
北大核心
2020年第6期15-21,共7页
Electric Drive
基金
国家自然科学基金资助项目(61433004)。
关键词
永磁同步电机
多模型组合磁链观测器
锁相环
复变陷波器
permanent magnet synchronous motor(PMSM)
multi-model combined flux observer
phase-locked loop(PLL)
complex notch filter
