This paper analyzes, designs and implements a reconfigurable phase-shifted full-bridge (PSFB) converter. It adopts the topology of the traditional PSFB converter and incorporates clamping circuits to solve some fundamental problems of conventional topology. In addition, auxiliary switches are employed for output reconfiguration, which allows expanding the output voltage range without compromising the system efficiency. Single pole double throw (SPDT) mechanical switches are used to realize series and parallel connections. In this paper, the characterization of the PSFB converter with clamping circuit and its design considerations are discussed. A 10 kW prototype with a power density of 0.485 W/cm³, 900 V input voltage and 400/800 V nominal output voltage was manufactured. The experimental results validated the analysis and confirmed the high conversion efficiency for a wide load range; an efficiency of 96.69% was obtained for the full load condition.

This paper presents an isolated regenerative active-clamped circuit designed for the current-fed half-bridge (IRACCFHB) converter. Its primary function is to reduce high voltage spikes across the main switches caused by energy stored in the leakage inductance of the power transformer using a clamping capacitor. This recovered energy is delivered efficiently to the load, maintaining the converter's high efficiency and voltage ratio. The proposed auxiliary circuit employs a single active switch with the same ground reference as the main switches, eliminating the need for an isolated gate driver. The converter achieves zero voltage switching (ZVS) during the turn-off of the main switches and zero current switching (ZCS) during the turn-on of the auxiliary switch. Energy recovery to the load is accomplished without compromising galvanic isolation due to employing a coupled inductor in the auxiliary circuit. To validate the proposed analysis and design, a $350~\mathrm{W}$ prototype was implemented.

Este artigo apresenta o projeto de um controlador fuzzy Takagi-Sugeno para o conversor Cuk bidirecional aplicado à carga e descarga de uma bateria. A bateria é modelada através de um modelo elétrico de segunda ordem. A técnica de modelagem, por valores médios em espaço de estados, é aplicada aos modos Buck e Boost do conversor Cuk, operando em modo de condução contínua (MCC). Do modelo por valores médios, em espaço de estados, um modelo fuzzy T-S do conversor Cuk bidirecional é derivado. O conceito de compensação distribuída paralela (CDP) é utilizado para a obtenção de uma lei de controle fuzzy integral do conversor, no qual os ganhos de retroalimentação são obtidos através da resolução de um problema de desigualdades matriciais lineares (DMLs). A saturação da entrada de controle do conversor é considerada na análise de estabilidade do sistema em malha fechada. Além disso, o critério de desempenho