永磁同步电机电流增量预测算法参数设计及性能分析  

Parameters design and performance analysis of current incremental predictive algorithm for PMSM

作　　者：王伟华[1] 肖曦[1] 

机构地区：[1]清华大学电机系,北京100084

出　　处：《电机与控制学报》2013年第12期98-105,共8页Electric Machines and Control

基　　金：国家自然科学基金(51177084)

摘　　要：针对永磁同步电机电流环带宽的拓展受到数字控制一拍滞后延时限制的问题,提出一种电流增量预测算法及相应的PI调节器参数设计规则。该算法通过两个相邻周期的离散电压方程相减的方式预测出下一周期电流值,用预测值取代检测值改进PI调节器。对算法稳定性及参数敏感性进行研究,给出一套PI参数设计规则,并与传统PI调节器的动态性能进行比较。研究结果表明,增量预测算法可以有效消除一拍滞后延时的影响,同时拓宽PI参数稳定域,计算量少,且对电机参数依赖度低,配合提出的参数设计规则可显著拓展电流环带宽。仿真和实验结果验证了所提方案的有效性。Aiming at expanding bandwidths of current loop of permanent magnet synchronous motor which is limited by one-step-delay of digital controller, an incremental predictive algorithm of current and a cor- responding parameters designing rule for PI regulator are proposed. Current of the next sampling period was predicted by subtracting two adjacent discrete voltage equations. In this way, PI regulator was im- proved due to the elimination of the impact of one-step-delay. Stability and parameter sensitivity of the proposed algorithm were analyzed, and a designing rule of parameter for PI regulator was presented mean- while. Comparison of dynamic performance between the conventional PI regulator and the improved regu- lator was carried out. Research shows that incremental predictive algorithm proposed can effectively elimi- nate the impact of one-step-delay, while broadening parameter stability region of PI regulator. Besides, it has advantages of a little calculation burden required and low dependence on motor parameters. The dy- namic performance of current can be significantly improved adopting both the incremental predictive algo- rithm and the parameter designing rule. Simulation and experimental results verify the effectiveness of the proposed scheme.

关 键 词：伺服系统 永磁同步电机 增量预测算法 带宽 

分 类 号：TP464[自动化与计算机技术]