永磁同步电机的变结构MRAS转速辨识系统

发布时间：2018-04-26 03:15

本文选题：永磁同步电机 + 无速度传感器　；参考：《自动化仪表》2014年12期

【摘要】：为改善模型参考自适应系统(MRAS)速度观测器在永磁同步电机控制中对参数变化和负载扰动较敏感的问题,提出一种变结构MRAS转速辨识方法。该方法利用滑模变结构代替MRAS的自适应律,利用双曲正切函数Sigmoid代替符号切换函数,以降低滑模模态的抖动。理论分析和仿真结果表明,基于变结构MRAS观测器的永磁同步电机无速度传感器控制系统具有较好的动静态性能和较强的鲁棒性。
[Abstract]:In order to improve the sensitivity of the speed observer of model reference adaptive system (MRAs) to parameter variation and load disturbance in PMSM control, a variable structure MRAS speed identification method is proposed. In this method, the sliding mode variable structure is used to replace the adaptive law of MRAS, and the hyperbolic tangent function Sigmoid is used to replace the symbol switching function to reduce the jitter of sliding mode. Theoretical analysis and simulation results show that the speed sensorless control system of PMSM based on variable structure MRAS observer has better dynamic and static performance and strong robustness.
【作者单位】：兰州交通大学自动化与电气工程学院;
【分类号】：TM341

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