摘要
针对永磁同步电机在高频运行和控制载波比低的情况下,电流环控制容易失稳的问题,采用基于复系数传递函数的方法,推导了表贴式永磁同步电机电流环的复系数开环和闭环传递函数。在同步旋转坐标系下,建立复系数电流环控制模型,利用根轨迹法分析电机阻抗耦合和数字控制延时对稳定性的影响,并给出电流环控制的失稳条件。对比电流反馈解耦和复系数PI解耦两种方法,采用一种改进的带角度补偿的复系数PI控制器,解决了电流环失稳问题。仿真和实验证明了理论分析的正确性和有效性。
Under the condition of high frequency operation of permanent magnet synchronous motor(PMSM) and low control carrier ratio, the current loop control is apt to lose stability. In this paper, the current open and closed loop transfer function based on complex-coefficients theory was established in the synchronous reference frame. On this basis, the root locus method was used to analyze the influence of motor impedance coupling and digital control delays on the stability of the current loop, and the instability conditions were presented. Two decoupling methods of current feedback(CFB) and complex-coefficient proportional-integrator(CC-PI) were compared, and the problem of current loop instability was solved by using an improved CC-PI controller with angle compensation. Simulation and experiment prove the correctness and validity of the theoretical analysis.
作者
国敬
范涛
章回炫
边元均
温旭辉
GUO Jing;FAN Tao;ZHANG Huixuan;BIAN Yuanjun;WEN Xuhui(University of Chinese Academy of Sciences,Haidian District,Beijing 100049,China;Institute of Electrical Engineering,Chinese Academy of Sciences,Haidian District,Beijing 100190,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2019年第24期7336-7346,共11页
Proceedings of the CSEE
基金
国家重点研发计划项目(2016YFB0100600)~~
关键词
永磁同步电机
电流环稳定性
耦合
低载波比
复系数
permanent magnet synchronous motor (PMSM)
current loop stability
coupling
low carrier ratio
complex-coefficient
作者简介
国敬(1985),男,博士研究生,研究方向为永磁同步电机驱动技术,guojing@mail.iee.ac.cn。
