Conceptual Overview of Transmotor and Transgenerator Technologies: Enhancing Energy Efficiency in Electric Vehicle and Renewable Energy Powertrains

Electrification is rapidly becoming the dominant trend in transportation, with electric vehicles (EV s) leading the charge. However, persistent challenges such as large battery size and degradation, compromised multi-form power conversion ef-ficiency, and the limitations of traditional transmissions continue to undermine their potential. This paper reviews the Transmo-tor/Transgenerator, a pioneering three-port electric machine with two mechanical ports and one electrical port, simultaneously integrating motor/generator and magnetic clutch functionalities within a single system. By enabling the seamless integration of key components such as flywheels and ultracapacitors, the Trans-motor/Trangenerator redefines power delivery and recovery, providing a more efficient and scalable solution for both electric vehicle powertrains and renewable energy systems. Simulation-based case studies demonstrate its superiority over conventional electric powertrains, while experimental results further substan-tiate its performance enhancements and scalability, confirming its transformative potential.