摘要
为提高三相永磁同步电机单电流传感器条件下的控制性能,提出了一种基于全阶滑模观测器和准比例谐振调节器的电流重构方法。该方法首先在两相静止坐标系下以电流和扩展反电动势为观测量,建立了全阶滑模观测器的数学模型。然后利用准PR调节器对未知相电流误差进行重构,以获得全阶滑模观测器所需要的电流误差信息。最后利用观测器估计的电流信息实现高性能的闭环矢量控制,并给出了观测器和准PR调节器的参数设计方法。相较于传统的低通滤波器与PI调节器的控制方法,所提方法实现简单并且避免了低通滤波器造成的相位滞后和幅值衰减问题。半实物实时仿真结果表明,新方法在不同工况下的dq轴电流谐波减小10%~20%,并且具有更高的转矩控制精度和更好的动态性能。
To improve the control performance of a three-phase permanent magnet synchronous motor with a single current sensor,a current reconstruction method based on full-order sliding mode observer and a quasi-proportional resonant regulator is proposed.First,the mathematical model of the full-order sliding mode observer is established in the two-phase stationary coordinate frame with the current and extended back electromotive force as the observed quantities.Then the unknown phase current error is reconstructed using a quasi-proportional resonant(quasi-PR)regulator to obtain the current error information required by the full-order sliding mode observer.Finally,the current information estimated by the observer is used to realize high-performance closed-loop vector control,and the parameter design methods of the observer and quasi-PR regulator are also provided.Compared with the traditional control method using a low-pass filter and a PI regulator,the proposed method is simple to implement and avoids the problems of phase lag and amplitude attenuation caused by the low-pass filter.The‘hardware-in-the-loop’real-time simulation results show that the new method reduces the dq-axis current harmonics by 10%~20%under a variety of working conditions,and has higher torque control accuracy and better dynamic performance.
作者
许观达
肖飞
连传强
刘计龙
XU Guanda;XIAO Fei;LIAN Chuanqiang;LIU Jilong(National Key Laboratory of Science and Technology on Vessel Integrated Power System,Naval University of Engineering,Wuhan 430033,China)
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2022年第23期104-111,共8页
Power System Protection and Control
基金
国家自然科学基金面上项目资助(52177202)。
关键词
永磁同步电机
单电流传感器
全阶滑模观测器
准比例谐振调节器
矢量控制
permanent magnet synchronous motor
single current sensor
full-order sliding mode observer
quasi-proportional resonant regulator
vector control
