Improved Adaptive Robust Control With MRAS for High-Temperature Wound Rotor Synchronous Machine Featuring Anodized Aluminum Coils

This paper presents a robust and adaptive control strategy for wound rotor synchronous machines with anodized aluminum tape coils, designed to operate reliably at temperatures around 300°C. At such high temperatures, significant changes occur in key motor parameters, including resistance, inductance, and flux linkage. These variations adversely affect the accuracy and stability of speed and current control, making traditional control methods insufficient. To address the challenge, the proposed approach combines cascaded control loops with advanced parameter estimation techniques. Leveraging adaptive algorithms, the system dynamically and continuously estimates and compensates the variations in resistance, inductance, and rotor flux, thereby ensuring accurate control of stator currents and rotor speed. On top of that, the strategy integrates a disturbance observer to detect external perturbations and adjust control actions in real time, improving the overall robustness of the machine under varying operating conditions. Simulation and experimental results confirm the effectiveness of the proposed adaptive robust control strategy, demonstrating improved performance and stability of the wound rotor synchronous machine even under extreme thermal operating conditions.