基于自适应全阶观测器的感应电机低速发电运行稳定性

发布时间：2019-06-04 09:06

【摘要】：速度自适应全阶观测器已经被成功和广泛地应用于感应电机无速度传感器驱动系统,然而许多研究和实践工作都表明,基于自适应全阶观测器的感应电机驱动系统在低速发电运行状态会出现不稳定现象。本文利用自适应控制理论,推导出基于开环全阶磁链观测器的使转速估计值及估计磁链稳定的充分必要条件,并进而给出了在给定转速条件下驱动系统发生不稳定现象的发电性质负载转矩边界值,从理论上阐明了何时会出现不稳定现象的问题。同时基于转矩-转速平面下的驱动系统相关特性分析,提出通过增大磁链幅值,增强驱动系统在低速发电模式下的带载能力,扩大稳定运行范围。仿真和实验结果验证了文中理论分析和提出方法的有效性。
[Abstract]:Speed adaptive full-order observer has been successfully and widely used in speed sensorless drive system of induction motor. However, many research and practical work have shown that the speed adaptive full-order observer has been successfully and widely used in induction motor sensorless drive system. The induction motor drive system based on adaptive full-order observer will be unstable in the running state of low speed power generation. In this paper, based on the adaptive control theory, the necessary and sufficient conditions for the speed estimation and the estimated flux stability based on the open-loop full-order flux observer are derived. Furthermore, the boundary value of the load rotation moment of the driving system under the given speed is given, and the problem of when the instability will occur is explained theoretically. At the same time, based on the analysis of the related characteristics of the drive system in the torque-speed plane, it is proposed to expand the stable operation range by increasing the amplitude of the flux linkage and enhancing the load capacity of the drive system in the low speed power generation mode. The simulation and experimental results verify the effectiveness of the theoretical analysis and proposed method.
【作者单位】：上海大学机电工程与自动化学院;
【基金】：国家重大科学仪器设备开发专项资助项目(2012YQ15008703)
【分类号】：TM346

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