高性能伺服系统电流环关键技术研究

Research on Key Techniques of Current Loop in High-performance Servo System

电流环是影响整个永磁同步电机伺服系统控制性能的核心,而其控制品质由多种因素决定。在永磁同步电机矢量控制电流环控制模型基础上,通过对影响电流环性能的多种因素进行综合分析和研究,提出了抗噪声的电流采样优化策略和抗反电势干扰的控制优化策略。理论分析和实验结果表明,所提方案能有效克服噪声和反电势的干扰,提高电流环的动态性能。

Current loop whose control quality depends on multiple factors has a great influence on the performance of a permanent magnet synehromous motor （PMSM） servo system. Dominant factors that affected the control quality were analyzed based on current loop control model of PMSM vector control. An anti-noise current sampling optimized method and a new control optimized method which was resistant to back EMF disturbance were proposed. Through theoretical analysis and experiment, the proposed methods can effectively restrain the disturbance from noise and back EMF, which improve the dynamic performance of current loop.