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A ZVS Bidirectional DC–DC Converter With Phase-Shift Plus PWM Control Scheme

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2 Author(s)
Huafeng Xiao ; Nanjing Univ. of Aeronaut. & Astronaut., Nanjing ; Shaojun Xie

The current-voltage-fed bidirectional dc-dc converter, which refers to a current-fed inverter at low voltage side and a voltage-fed inverter at high voltage side, can realize zero voltage switching (ZVS) for the switches with the use of phase-shift (PS) technology. However, the current-fed switches suffer from high voltage spike and high circulating conduction loss. In order to solve these problems, a novel phase-shift plus pulsewidth modulation (PSP) control ZVS bidirectional dc-dc converter is proposed in this paper. By adopting active clamping branch and PSP technology, the converter can realize ZVS for all switches in a wide range of load variation while input or output voltage varies. In addition, a novel control strategy with one port voltage regulation and another port current regulation is proposed to make energy bidirectional conversion freely. The operation principle is analyzed and verified by a 28 V/270 V conversion prototype rated at 1.5 kW.

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Power Electronics, IEEE Transactions on  (Volume:23 ,  Issue: 2 )