Zaky Mohamed S, Metwaly Mohamed K
Department of Electrical Engineering, College of Engineering, Northern Border University, 1321, Arar, Saudi Arabia.
Department of Electrical Engineering, College of Engineering, Taif University, 21974, Taif, Saudi Arabia.
Sci Rep. 2025 Apr 28;15(1):14769. doi: 10.1038/s41598-025-98178-7.
This paper presents an improved model reference adaptive system (MRAS) speed observer for sensorless induction motor drives (SIMDs) with rotor flux correction terms. Instead of relying only on the rotor flux estimate, which has issues with pure integration at low speeds, the suggested MRAS observer employs the dq stator currents and their estimation errors in the adjustable model of the IM. The rotor flux dynamics are considered correction terms for the estimated stator current to update and improve the estimated speed's accuracy. The adaptation process uses a fuzzy logic controller (FLC) rather than a traditional PI controller to enhance the robustness of the suggested technique. A DSP-DS1103-based laboratory prototype is used to evaluate the proposed stator current-based MRAS observer with FLC for indirect field-oriented control (IFOC) of SIMDs. The simulations are executed using Matlab/Simulink. Additionally, a comparison is made between the performance of the suggested and traditional MRAS schemes. The tests demonstrate the accuracy and robustness of the improved MRAS observer in four quadrant modes of operation, especially at very low and zero speeds.
本文提出了一种用于无传感器感应电机驱动（SIMD）的改进型模型参考自适应系统（MRAS）速度观测器，该观测器带有转子磁链校正项。所建议的MRAS观测器并非仅依赖于转子磁链估计值（低速时纯积分存在问题），而是在感应电机的可调模型中采用定子dq轴电流及其估计误差。转子磁链动态特性被视为估计定子电流的校正项，以更新并提高估计速度的精度。自适应过程使用模糊逻辑控制器（FLC）而非传统的PI控制器，以增强所提技术的鲁棒性。基于DSP-DS1103的实验室原型用于评估所提出的基于定子电流且带有FLC的MRAS观测器，用于SIMD的间接磁场定向控制（IFOC）。仿真使用Matlab/Simulink执行。此外，还对所提方案与传统MRAS方案的性能进行了比较。测试证明了改进型MRAS观测器在四象限运行模式下，尤其是在极低速度和零速度时的准确性和鲁棒性。
