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In this paper, the modular multilevel dc/dc converters, by integrating the full-bridge converters in series, are provided for high power and high voltage dc-based systems. Each circuit module includes a full-bridge converter and a half-bridge LLC resonant converter to implement the wide range of soft switching and low conduction losses. The ZVS condition of the power switches at the leading leg is...
In this study, a three-level hybrid dc/dc converter by integrating the full-bridge circuit, resonant circuit and three-level flying capacitor circuit is presented to achieve the main advantages of low-voltage stress of power devices, low circulating loss, low-voltage ringing on the rectifier diodes and low-output filter inductor for medium-voltage dc-based systems. Two full-bridge circuits are connected...
A 1.44 kW DC/DC converter with zero voltage switching (ZVS) for medium voltage applications is proposed in this study. Two half-bridge circuits with split capacitors are connected in series at high voltage side to limit voltage stresses of power switches at Vin/2. Three DC/DC circuits are adopted to share load current and reduce the current stress of rectifier diodes, transformers and output filter...
A new DC/DC converter with parallel circuits is presented for medium voltage and power applications. There are five pulse-width modulation (PWM) circuits in the proposed converter to reduce current stress at low voltage side for high output current. These five circuits have the same power switches so that the switch counts are reduced compared with the conventional parallel converters. In order to...
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