Enhanced Field-Oriented Control for Induction Motors Under Open-Circuit Faults Using Decoupled Speed and Flux Control With Adaptive Control Technique

This paper presents an enhanced fault-tolerant control framework for induction motor drive systems, emphasizing resilience, adaptability, and system-level reliability in interconnected industrial environments. A modified field-oriented control structure is developed to ensure decoupled flux and speed regulation under open-circuit fault conditions. The proposed control integrates an adaptive proportional–integral–resonant (PIR) controller within a reconfigured stationary reference frame to maintain stable operation even during partial phase loss. By continuously adjusting its resonant frequency in response to real-time feedback, the controller achieves superior transient and steady-state performance. Experimental validation on a dSPACE DS1104 real time platform compares the performance of PI, PR, and PIR controllers. Results reveal that the conventional PI controller fails to sustain post-fault operation, while the adaptive PR controller enhances system continuity and dynamicrecovery. The proposed adaptive PIR controller further mitigates torque pulsations, reducing torque ripple from over 60% (PI-based) to approximately 10%, demonstrating significant improvement in fault-tolerant performance and robustness. This approach contributes to the development of reliable, self-healing industrial drive subsystems for next-generation smart manufacturing systems.