The primary goal of this work is to significantly enhance an availability and operational reliability of a variable speed drive sys-tem, a factor critical for industrial processes where downtime must be minimized. This improvement is rooted in a robust power architecture: a dual open-end stator windings induction machine is utilized, where each entry of the machine is supplied by two cascaded two-level inverters, thereby increasing the system's inherent redundancy. The control strategy employed is the phase disposition pulse width modulation technique. The study comprehensively analyzes the system's behavior under various fault configurations, focusing specifically on the failure of a single cascaded inverter, and rigorously defines the critical operating and control conditions that must be implemented to maintain system functionality. Simulation results successfully demonstrate the effectiveness of this machine-cascaded inverter association in a degraded mode, ensuring continuity of service with rotation speeds very close to the nominal value, thereby validating the robustness of the chosen architecture for high-reliability applications.