The More Electrical Aircraft concept requires electronic devices able to efficiently and safely convert electrical power between\ndifferent voltage levels. Theentire realization of a bidirectional DC/DC converter, fromdesign to validation phase, is here discussed\nin detail. First, a boost full bridge electrical structure is selected, adopting a Parallel Input Parallel Output (PIPO) interleaving\ntechnique and an optimal turns ratio selection for the transformers in order to reduce both weight and size of the equipment. Next,\nmodulation schemes in both step-down and step-up modes are discussed. Successively ad hoc PI regulators for both operative\nmodes are presented. A key idea of the paper is that the converter behavior must be related not only to the control strategy but also\nto a global supervision logic able to safely conduct the converter operations and to react from external stimuli.Thus, a finite state\nmachine (FSM) approach is employed. An innovative strategy called buffermode is presented, defined as an intelligent combination\nof buck and boost modes. Extensive simulations and experimental results are shown, in order to confirm the effectiveness of the\nproposed approach.
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