永磁直线伺服系统电流环延时补偿  

Time delay compensation of current loop in permanent magnet linear servo system

作　　者：杨俊友[1] 于吉帅[1] 刘永恒[1] 白殿春[1] 

机构地区：[1]沈阳工业大学电气工程学院,沈阳110870

出　　处：《沈阳工业大学学报》2013年第6期601-605,共5页Journal of Shenyang University of Technology

基　　金：国家自然科学基金资助项目(51075281);教育部高等学校博士学科点专项资助项目(20112102110002);辽宁省高等学校创新团队资助项目(LT2010081);辽宁省自然科学基金资助项目(201102163)

摘　　要：为了解决永磁直线伺服系统电流环延时问题,讨论了电流矢量控制原理,并指出典型脉冲宽度调制(PWM)时序存在一个采样周期时间延迟的现象.在同步旋转坐标系电流解耦控制基础上,分析了由于时间延迟导致的逆变器电压给定值幅值变化与相位滞后的原因,并提出了相应的补偿方法,将逆变器电压给定值幅值乘以比例系数,并且对d、q轴耦合电压解耦.通过永磁直线伺服系统电流环实验,对比电流环延时补偿前后d、q轴电流响应,证明补偿后d、q轴电流性能明显提高,实验结果也验证了理论分析的正确性与补偿方法的有效性.To solve the problem of time delay of current loop in permanent magnet linear servo system, the current vector control principle was discussed. It was indicated that a time delay phenomenon for the sampling period existed in the typical PWM time sequence. Based on the current decoupling control in synchronous rotating coordinates, the reasons about the amplitude variation and phase lag of given voltage values for the inverter caused by time delay were analyzed. The corresponding compensation methods were proposed, where the amplitudes of given voltage values for the inverter were multiplied by a proportional coefficient and the decoupling for both d and q axes coupling voltages was carded out. Through the current loop experiments for the permanent magnet linear servo system, the d and q axis current response for current loop before and after compensation were compared. It is proved that the current performances for d and q axes after compensation get obviously improved. The experimental results also verify the correctness of theoretical analysis and the effectiveness of compensation methods.

关 键 词：永磁直线伺服系统 脉冲宽度调制 时间延迟 电流环 电压解耦 逆变器 矢量控制 延时补偿 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]