A Novel Dynamic Configuration for Long-Term Fault-Tolerant Operation of Open-End Winding Induction Motors

This paper presents a novel dynamic configuration for ensuring long-term fault-tolerant operation of three-phase open-end winding induction motors (3P-OEWIM). Conventional strategies are limited by their inability to sustain performance under multiple simultaneous failures, particularly when faults affect both inverters or power sources. To address these limitations, this study proposes an integrated topology that combines fault-tolerant techniques from conventional star-connected drives, common DC supply OEWIM, and separate DC supplies OEWIM configurations. The proposed system dynamically reconfigures its power topology in response to fault conditions, maintaining rated power operation whenever possible and transitioning to reduced-power or two-phase modes under compound faults. Simulation results demonstrate that the proposed strategy enhances system resilience against consecutive failures, including combined DC supply and inverter faults. Integrating these multiple strategies into a single dynamic topology improves operational continuity, making 3P-OEWIM drives more resilient for critical applications such as electric vehicles and industrial automation.