摘要
结合滑模观测器对电机参数和测量的鲁棒性强以及转子磁链定向的矢量控制能够实现dq轴的解耦控制的优点。文中建立了直驱型永磁风力发电机无速度传感器控制系统,位置观测基于滑模变结构理论对发电机转子位置进行观测。与传统滑模位置观测不同,本文引入双弯曲函数代替符号函数或饱和函数来取消滤波环节和消除抖振。仿真与实验结果表明该位置观测器继承了传统滑模位置观测的优点同时又消除滤波带来的相移,并消除了抖振,具有良好的控制性能。
A sensorless control system of direct-drive PMSG based on a novel sliding mode observer was built, of which SMO was used to robust to the PMSG parameters and measurement errors and rotor flux orien- ted vector control technology was adopted to control the dq-axis respectively. In the system, sigmoid function was instead of sign function or saturated function. And the low pass filters may not be necessary. As a re- sult, the delay time due to low pass filters would not be appeared in this proposed observer. The chattering problem also was solved by the method. The simulation results and the experiment results proved the validity of the control strategy.
出处
《微电机》
北大核心
2013年第1期46-49,共4页
Micromotors
基金
湖南省教育厅青年项目(09B012)
