Pulsed flywheel energy storage systems are capable of delivering the instantaneous high power required for electromagnetic launch operations. They provide a reliable pulsed power supply, meeting the demands for rapid, consecutive launches in electromagnetic launch systems, and are thus well-suited for electrified pulsed power applications. Characterized by high power density, instantaneous high-power output, low loss, rapid response, strong environmental adaptability, and ease of maintenance, pulsed flywheel energy storage represents a significant research direction for future high-power pulsed power source technologies. This study presents a vector control-based technique for electrically excited flywheel motors. An experimental platform was established to validate key motor parameters and the proposed control strategy. In our discharge tests, the system successfully delivered 1.9 MW of output power while maintaining stable voltage throughout both charging and discharging cycles. These results satisfy the operational requirements for pulsed energy storage devices and provide an engineering foundation for flywheel-based pulsed energy storage technology.