摘要
由于数字控制固有的采样、滤波延时等因素,限制了系统电流环的性能,因此为了减小延时并提高伺服系统电流环控制性能,提出了一种基于无差拍控制原理的永磁同步电机鲁棒预测电流控制算法。根据电流给定和相应系统变量的反馈值,计算出下一周期逆变器的开关状态。分析了电机电感误差、电流采样及其滤波引起的系统相角裕量减小的问题。为了补偿系统的相角裕量,提高系统对电感参数的容许误差,引入了龙伯格(Luenberger)状态观测器,通过调节鲁棒性系数来增加系统的相角裕量。定量给出了鲁棒性系数与系统带宽和相角裕量之间的关系。使用一套750W永磁同步伺服单元验证了算法的有效性,并分析了仿真和实验结果。
The current loop performance is limited due to the inherent sampling and filtering delay of numerical control system. In order to further improve the current control performance of servo system, this paper presented a robust predictive current control for permanent magnet synchronous motors （PMSM） based on deadbeat control to improve the performance of the current loop. According to the current reference and the feedbacks of relevant state variables, the proposed algorithm calculated the switch signals applied in the next sampling period. The reduction of system phase margin which is caused by current sampling and filtering and the motor inductance error were analyzed. In order to compensate the phase margin and increase the tolerance of inductance error, the Luenberger state observer was involved. The system phase margin will be increased by means of adjusting the robust parameter. The relationship of robust parameter between the system bandwidth and phase margin were given. A 750 W PMSM was involved to verify the effectiveness of the proposed algorithm, and then the simulation and experiment results are analyzed.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2013年第15期78-85,13,共8页
Proceedings of the CSEE
基金
国家自然科学基金项目(51007012)~~
关键词
永磁同步电机
电流预测控制
无差拍控制
鲁棒性
permanent magnet synchronous motor （PMSM）
predictive current control
deadbeat control
robustness
