摘要
为提高异步电机的运行效率和驱动性能,提出一种基于滑模自适应控制理论的定子磁链无速度传感器控制策略,通过Lyapunov理论推导出的自适应收敛律能准确地估计转速;针对传统磁链观测器所存在的纯积分问题,又提出串联一阶低通滤波器(LPF)的改进型磁链观测器,新型磁链观测器没有相位和幅值的偏差,能较好地抑制直流偏移;最后,通过实验验证了所提控制策略的可行性。
In order to improve the operational efficiency and drive control performance of the asynchronous motor, a novel scheme on stator-flux speed sensorless observer based on adaptive sliding-mode theory was proposed. The speed observer＇s adaptation law was derived based on Lyapunov theorem to ensure estimation stability. With the problem of pure integral for flux observer, a new flux observer with serial low pass filter was also proposed, which can control DC offset without bias of phase and amplitude. Finally, experiments prove the feasibility of the proposed schemes.
出处
《电气传动》
北大核心
2015年第6期16-19,25,共5页
Electric Drive
基金
国家自然科学基金(51177018)
关键词
异步电机
直接转矩控制
滑模自适应
速度观测器
低通滤波器
磁链观测器
induction motor
direct torque control （DTC）
adaptive sliding-mode
speed observer
low pass filter（LPF）
flux observer
