基于改进状态观测器的BDCM无传感器模糊PID控制研究

Hanghang Qu, Jie Zeng, Ranran Sheng, Yongwei Guo
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引用次数: 2

摘要

摘要:相对于传统的反电动势过零点(ZCPs)延迟检测方法,本文提出了一种基于线路电压和电流构造状态观测器估计线路反电动势的无刷直流电机转子位置检测新方法。并对观测器进行改进,将线性误差函数加入观测器原有的非线性误差反馈系数中。这两种功能的结合有助于加速观测器的收敛,提高观测器的稳定性。为了使其转速更加稳定,采用模糊PID代替传统的外圈转速PID。仿真结果表明,该方法能准确估计转子的位置信息。利用模糊PID控制方法,可以在较宽的转速范围内实现无刷直流电机的精确控制。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Research on Sensorless Fuzzy PID Control of BDCM based on Improved State Observer
Abstract: Relative to traditional methods of back-EMF zero crossing points (ZCPs) delay detect, a new method to detect the rotor position of BLDCM is proposed by constructing a state observer to estimate line back-EMF based on line voltage and line current in this paper.And improve the observer, the linear error function is added to the original nonlinear error feedback coefficient of the observer. The combination of the two functions helps accelerate the convergence of the observer and improve the stability of the observer.In order to make its rotate speed more stable, the fuzzy PID is used to replace the traditional PID for the outer ring of the rotate speed.Finally, the simulation results show that this method can accurately estimate the position information of the rotor. With the help of the fuzzy PID control method, the precise control of BLDCM can be realized in a wide speed range.
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