With the use of sensorless control strategy, mechanical position sensors can be removed from the gearbox, so as to decrease the maintenance costs and enhance the system robustness. In this paper, a switching PI control based model reference adaptive system (MRAS) observer using Fuzzy-Logic-Controller (FLC) is introduced for sensorless control of permanent magnet synchronous motor (PMSM) drives. The main work and innovation of this paper include: 1) A disturbance observer based voltage compensation method is proposed to solve the problems of voltage distortion in voltage source inverter (VSI) fed PMSM systems. 2) A double closed-loop FLC is designed for speed and current control. The response performance of speed regulation and the accuracy of the command voltage are improved, and the difficulty of manual adjustment of control parameters is avoided. 3) A sensorless control strategy of a switching PI control based MRAS observer is proposed for stator resistance tracking. By setting different thresholds, the proposed MRAS observer can choose the appropriate PI adaptive mechanism based on the amplitude of the current error variable, which can improve the accuracy of resistance estimation and improve the dynamic performance of sensorless control. 4) The experimental results are given to verify the availability of the proposed scheme.

中文翻译：

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基于开关 PI 控制的 MRAS 用于使用模糊逻辑控制器对 PMSM 驱动器进行无传感器控制

采用无传感器控制策略，可以将机械位置传感器从齿轮箱中移除，从而降低维护成本，增强系统鲁棒性。在本文中，介绍了一种使用模糊逻辑控制器 (FLC) 的基于开关 PI 控制的模型参考自适应系统 (MRAS) 观测器，用于永磁同步电机 (PMSM) 驱动器的无传感器控制。本文的主要工作和创新点包括： 1) 针对电压源逆变器(VSI)馈电PMSM系统中的电压畸变问题，提出了一种基于扰动观测器的电压补偿方法。2）双闭环FLC设计用于速度和电流控制。提高了调速的响应性能和指令电压的准确性，避免了手动调节控制参数的困难。3）提出了一种基于开关PI控制的MRAS观测器的无传感器控制策略，用于定子电阻跟踪。通过设置不同的阈值，本文提出的MRAS观测器可以根据电流误差变量的幅值选择合适的PI自适应机制，从而提高电阻估计的准确性，提高无传感器控制的动态性能。4) 给出了实验结果来验证所提方案的有效性。可以提高电阻估计的精度，提高无传感器控制的动态性能。4) 给出了实验结果来验证所提方案的有效性。可以提高电阻估计的精度，提高无传感器控制的动态性能。4) 给出了实验结果来验证所提方案的有效性。