摘要
针对目前的单电流弱磁控制方法无法实现内置式永磁同步电机高速区运行效率最优的问题,提出一种基于梯度下降的单电流弱磁优化控制方法。首先在分析单电流弱磁控制思想的基础上,根据电机运行点恒转矩方向在电流下降梯度上的投影关系,在线寻优修正交轴电压使其工作电流达到最小值,从而实现了系统效率的提升;同时证明了梯度下降方法在解决内置式永磁同步电机弱磁优化控制问题时结果的惟一性;最后分别搭建了基于Matlab/Simulink和d SPACE的仿真与试验平台,与现有弱磁优化方法的对比试验研究结果表明,该文提出的方法可提高内置式永磁同步电机高速区的运行效率,为系统的高效运行提供了有效途径。
Considering the fact that single current weakening control methods cannot guarantee optimum motor efficiency in high-speed field-weakening control of interior permanent magnet synchronous motors（ IPMSM）,this paper proposes a novel weakening control method based on gradient descent by using single current regulator. On the basis of single current control,this online method automatically optimizes the corrected q-axis voltage by comparing the current gradient descent direction and the constant torque direction of the load and speed respectively, so that the current reaches the minimum to improve operational efficiency. It is also proved that the optimal result of this problem is unique and optimal. Finally,the motor simulation and experiment platforms based on Simulink and d SPACE are set up to demonstrate the superiority of this method compared with traditional weakening control methods. The results show that the proposed method can improve the efficiency of the permanent magnet synchronous motor in the high speed region,which provides an effective way for the efficient operation of the system.
出处
《电工技术学报》
EI
CSCD
北大核心
2016年第15期8-15,共8页
Transactions of China Electrotechnical Society
基金
国家重点基础研究发展(973)计划项目(2013CB035600)
国家自然科学基金重大国际(地区)合作研究项目(61320106011)和国家自然科学基金项目(61573223)资助
关键词
单电流控制
弱磁控制
永磁同步电机
梯度优化
Permanent magnet synchronous
flux-weakening control
single current control
gradient optimization
