摘要
电机高速或低开关频率运行时呈现低载波比运行特征,会加重定子电流在两相旋转坐标系下的耦合程度,严重时会导致电流环失稳。为有效提升永磁同步电机(PMSM)低载波比运行时的电流控制效果,在电流环复矢量建模的基础上,引入数字和角度延时表征低载波比运行影响。针对传统解耦控制方法的不足,设计适用于PMSM低载波比运行的电流内模解耦控制方法,深入对比分析不同解耦控制方法的性能。实验结果表明,所研究的电流内模解耦控制方法不仅能在低载波比时具有良好的电流解耦控制性能,而且在定子电感参数失配时具备良好的控制鲁棒性。
Whether the motor is running at high speed or at low switching frequency,it exhibits the operating characteristics of low carrier ratio,which will exacerbate the coupling degree in the stator current in the rotating coordinate system,and it might lead to current loop instability.In order to improve the current control performance of permanent magnet synchronous motor(PMSM)with low carrier ratio,the digital and angular delay are introduced to characterize the effect of operating at low carrier ratio based on the current loop complex vector modeling.With the limitations of traditional decoupling control methods,a current internal model decoupling control strategy suitable for PMSM has been designed,and comprehensive comparative analysis of different decoupling control methods also has been conducted.Simulation and experimental results demonstrate that the proposed current inner model decoupling control method not only exhibits excellent current decoupling control performance under a low carrier ratio,but also possesses excellent robust control performance in the presence of stator inductance parameter mismatch.
作者
袁庆庆
董朔
施建君
钟晨鸣
YUAN Qing-qing;DONG Shuo;SHI Jian-jun;ZHONG Chen-ming(Shanghai University of Science and Technology,Shanghai 200093,China)
出处
《电力电子技术》
2024年第3期31-35,共5页
Power Electronics
基金
上海市青年科技英才扬帆计划(18YF1418300)。
关键词
永磁同步电机
低载波比
内模解耦控制
permanent magnet synchronous motor
low carrier ratio
internal model decoupling control
