摘要
转矩环和磁通环的解耦控制是矢量控制性能的保证,而解耦控制的精度取决于磁通观测器定向于电机实际磁通的精度。本文在分析电机参数不确定性的基础上,建立了考虑铁损的感应电动机全阶H∞磁通观测器。考虑磁通变化并采用增益规划控制设计线性时变系统的综合观测器,推导出不确定性与观测器误差的传递函数,通过配置观测器的极点区域提高H∞磁通观测器的动态性能,求解线性矩阵不等式得到H∞磁通观测器的反馈阵。建立实验系统,通过改变电机磁通幅值与电流模型对比了两种观测器的鲁棒性。
Based on vector control theory, the decoupling control of torque loop and flux loop must be guaranteed in order to control the torque and flux exactly. Decoupling control of induction motor can only be guaranteed when the flux observed is the same as the actual motor flux in field-oriented control.This paper proposes a full-order H∞ flux observer of induction motor considering core loss. Provided flux amplitude is not a constant, Scheduling-gain is used to synthesize the observer of linear paramter varing systerri. Dynamic performance of observer is improved via H∞ design with pole placement constraints. Feedback matrix of H∞ flux observer is solved by linear matrix inequality. An experimental system based on dual DSP is set up. The theory and method are verified by experiments. The induction motor drive with H∞ flux observer has been installed into a hybrid bus.
出处
《电工技术学报》
EI
CSCD
北大核心
2006年第8期31-35,62,共6页
Transactions of China Electrotechnical Society
