This study presents an advanced control strategy for switched reluctance motors applied in eco-friendly marine propulsion systems. To address the challenges of low-speed control precision and torque ripple inherent in SRMs, a novel integration of a high-gain DC-DC single-ended primary inductance converter with a bridge resonance converter is proposed to efficiently boost and regulate DC voltage. A proportional-integral (PI) controller optimized via the grey wolf optimization algorithm is developed to enhance speed control accuracy and significantly reduce torque fluctuations. Comparative simulations in MATLAB/SIMULINK (Ver 2024a), supported by hardware prototyping and experimental validation, demonstrate that the GWO-optimized PI controller outperforms classical PI control by delivering superior dynamic response, reduced torque ripple, and precise speed tracking. The proposed approach advances marine electric propulsion technology by offering a robust, efficient, and environmentally sustainable solution for SRM control.