摘要
针对感应电机无传感器直接转矩控制下的速度辨识问题,在模型参考自适应方法的基础上,提出并实现了一种单维离散滑模模型参考自适应速度观测方法。算法首先采用传统模型参考自适应算法获得辨识磁链,然后依据波波夫定理求得的误差函数作为滑模面函数,以离散时间滑模控制策略替代模型参考自适应中的比例积分环节完成对转速的估计。通过与传统模型参考自适应算法的仿真比较研究,说明该方法在直接转矩控制系统中的速度动态辨识能力得到提高。实验结果验证了本文提出的方法是有效的,具有实际应用价值。
The speed estimation in direct torque control for speed sensorless technology is studied profoundly in this paper.An improved algorithm named single-manifold discrete time sliding mode MRAS is proposed on the basis of model reference adaptive system.The new algorithm obtains the identification flux using the classic MRAS,and the PI adaptive law in MRAS is replaced with the sliding mode observer which is acquired by the error function according to the Popov theory.The chattering problem is decreased by using a discrete time sliding mode control strategy.Simulation and experimental results prove the effectiveness of the algorithm by comparing with classic MRAS method.
出处
《电工技术学报》
EI
CSCD
北大核心
2012年第4期54-58,64,共6页
Transactions of China Electrotechnical Society
基金
国家科技支撑计划资助项目(2012BAF09B02)
关键词
速度辨识
模型参考自适应
滑模控制
直接转矩控制
Speed estimation
model reference adaptive system
sliding mode control
direct torque control
