摘要
无刷直流电机工作时产生的换相转矩波动严重影响着其在高精度伺服系统中的应用。本文将无模型控制中的泛模型思想与预测控制相结合,提出一种无模型预测控制方法来抑制无刷直流电机换相时的转矩波动。通过推导无刷直流电机控制系统的泛模型的表达式,将泛模型作为预测模型,通过价值函数选择最优的开关状态,保持非换相相电流值恒定。实验结果证明,该方法能有效抑制电机在额定转速以下的高、低速情况下的换相转矩波动,控制过程中不需要精确的电机参数,算法简单,易于实现。
The torque ripple of brushless DC motor（ BLDCM） generated in the commutation process seriously affects their applications in the precision servo system. This paper presents a model free predictive control method,which combines the universal model and the predictive control, to suppress the commutation torque ripple of the BLDCM. In this paper, the expression of the universal model of the brushless DC motor control system is derived. By taking the universal model as the predictive model to select the optimal switch state through the value function,the non-commutation phase current can be kept constant. The experimental results show that the proposed method can effectively suppress the commutation torque ripple of the BLDCM in both low and high speeds under the rated speed. Since parameters of electric machines are not necessary in the proposed control process,the algorithm is simple and easy to realize.
出处
《电工技术学报》
EI
CSCD
北大核心
2016年第15期54-61,共8页
Transactions of China Electrotechnical Society
基金
国家重点基础研究发展计划(973计划)(2013CB035600)资助项目
关键词
无刷直流电机
转矩波动
无模型预测控制
价值函数
Brushless DC motor
torque ripple
model free predictive control
value function
