Fuel cell-powered electric drives face significant challenges during load transients due to the slow dynamic response and nonlinear V-I behaviour of Proton Exchange Membrane Fuel Cells (PEMFCs). To address this, the book presents a PEMFC-battery hybrid energy system regulated by a tuned buck-boost DC-DC converter and governed by a precisely tuned PI controller (Kp = 2, Ki = 2.55) to maintain a constant DC link voltage. The system powers a three-phase Field-Oriented Controlled (FOC) Permanent Magnet Synchronous Motor (PMSM), which serves as an active dynamic load to evaluate system performance...