基于滑模模型参考自适应系统观测器的永磁同步电机预测控制

发布时间：2018-06-08 15:25

本文选题：永磁同步电机 + 三电平逆变器　；参考：《电工技术学报》2017年06期

【摘要】：针对一种三电平驱动的永磁同步电机控制系统,设计了一种无速度传感器有限集预测控制策略。首先,针对三电平逆变器驱动电路,采用有限集预测控制策略将其开关控制矢量看成一个有限集,在此有限集中搜索使目标函数最优的开关矢量,目标函数选择为输出误差电流,保证了电机定子电流波形的质量。其次,基于滑模模型参考自适应系统(MRAS)方法,利用电机本体的参考模型与电流模型的输出误差构造滑模面,设计了电机速度观测器,以改善位置和速度估计精度并提高系统的鲁棒性,并分析证明其稳定性。实验结果表明预测控制器较传统PID控制器能够提高定子电流波形质量,同时观测器能够较精确地估计永磁同步电机转子位置和速度,具有较好的鲁棒性。实现了对永磁同步电机的无传感器预测控制。
[Abstract]:A speed sensorless finite set predictive control strategy is designed for a three level drive permanent magnet synchronous motor (PMSM) control system. First of all, the switching control vector is regarded as a finite set by the finite set predictive control strategy for the three-level inverter drive circuit, and the switching vector that makes the objective function optimal is searched in the finite set. The objective function is chosen as the output error current, which ensures the quality of the stator current waveform of the motor. Secondly, based on the sliding mode model reference adaptive system (MRASS) method, the sliding mode surface is constructed by using the reference model of motor body and the output error of current model, and the speed observer of motor is designed. In order to improve the accuracy of position and velocity estimation and improve the robustness of the system, the stability of the system is proved by analysis. The experimental results show that the predictive controller can improve the quality of stator current waveform, and the observer can accurately estimate the rotor position and speed of PMSM. The sensorless predictive control of PMSM is realized.
【作者单位】：空军工程大学航空航天工程学院;
【分类号】：TM341

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