改进型滑模观测器的永磁同步电机无传感器控制策略

发布时间：2018-06-03 07:20

本文选题：永磁同步电机 + 滑模观测器　；参考：《西安交通大学学报》2016年06期

【摘要】：针对永磁同步电机(PMSM)实际运行时定子电阻和电感常发生随机变化的情况,提出了一种可进行永磁同步电机无传感器控制的定子电阻和电感在线辨识的改进型滑模观测器。为了削弱系统高频抖振,用近似饱和函数代替开关函数;基于Lyapunov稳定性理论,在保证观测器稳定性的同时,进行定子电阻和电感参数辨识,并将其反馈到观测器模型,实时修正观测器模型参数,从而提高估算精度;采用锁相环技术计算出转子位置和速度信息,将其反馈到电机控制系统。数值仿真结果表明,改进型滑模观测器能够快速、准确地跟踪转子位置,估算转子速度,且能辨识定子电阻和电感值并进行反馈,实现永磁同步电机无传感器控制。
[Abstract]:A modified sliding-mode observer for sensorless stator resistance and inductance identification of permanent magnet synchronous motor (PMSM) is presented in this paper. In order to weaken the high frequency buffeting of the system, the approximate saturation function is used to replace the switching function, and based on the Lyapunov stability theory, the stator resistance and inductance parameters are identified while the stability of the observer is guaranteed and fed back to the observer model. The parameters of the observer model are modified in real time to improve the estimation accuracy, and the information of rotor position and speed is calculated by phase-locked loop technique, which is fed back to the motor control system. Numerical simulation results show that the improved sliding mode observer can quickly and accurately track the rotor position, estimate the rotor speed, identify the stator resistance and inductance and feedback, and realize sensorless control of PMSM.
【作者单位】：湖北文理学院纯电动汽车动力系统设计与测试湖北省重点实验室;西安交通大学电气工程学院;
【基金】：国家自然科学基金资助项目(51307130) 中央高校基本科研业务费专项资金资助项目纯电动汽车动力系统设计与测试湖北省重点实验室开放基金资助项目(HBUASEV2015F002)
【分类号】：TM341

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