一种用于异步电机无速度传感器控制的自适应滑模观测器

发布时间：2019-06-10 15:13

【摘要】：针对异步电机无速度传感器中存在的对参数变化鲁棒性差的问题,研究了一种基于自适应滑模观测器的异步电机无速度传感器的矢量控制方案。自适应滑模观测器根据电机静止坐标系下的数学模型构造了转子磁链观测器,定子电流观测值与实际值的误差构成观测器的滑模面,在滑模运动下该观测器的观测值最终趋近于实际值,从而实现转子磁链的估计。电机转速由自适应方法估算得到,滑模观测器的稳定性可由李雅普诺夫稳定性证明。与其他方案相比,该方法的优点在于实现简单,对参数变化具有鲁棒性。仿真和实验对控制方案的正确性和可行性给出了验证,该观测器可以实现对转子磁链和转速的观测,且在负载扰动和给定转速变化的情况下该滑模观测器具有鲁棒性。
[Abstract]:In order to solve the problem of poor robustness to parameter variation in induction motor sensorless, a speed sensorless vector control scheme for asynchronous motor based on adaptive sliding mode observer is studied. The adaptive sliding mode observer constructs the rotor flux observer according to the mathematical model in the static coordinate system of the motor. The error between the stator current observation value and the actual value constitutes the sliding mode surface of the observer. Under sliding mode motion, the observed values of the observer finally approach the actual values, thus realizing the estimation of rotor flux linkage. The speed of the motor is estimated by the adaptive method, and the stability of the sliding mode observer can be proved by the stability of the sliding mode observer. Compared with other schemes, this method has the advantages of simple implementation and robustness to parameter changes. The correctness and feasibility of the control scheme are verified by simulation and experiment. the observer can observe the rotor flux and speed, and the sliding mode observer is robust under the condition of load disturbance and given speed change.
【作者单位】：上海大学机电工程与自动化学院;
【基金】：国家自然科学基金(51377102) 国家重大科学仪器设备开发专项资助项目(2012YQ15008703)
【分类号】：TM343

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