An Active Soft Switched Phase-Shifted Full-Bridge DC–DC Converter: Analysis, Modeling, Design, and Implementation
An Active Soft Switched Phase-Shifted Full-Bridge DC–DC Converter: Analysis, Modeling, Design, and Implementation
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DOI：
10.1109/tpel.2013.2284780
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发表时间：
2014-09
影响因子：
6.7
通讯作者：
Gorla Naga Brahmendra Yadav;N. L. Narasamma
中科院分区：
文献类型：
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作者：
Gorla Naga Brahmendra Yadav;N. L. Narasamma
提出了一种新型的有源软开关移相全桥DC-DC转换器。在脉宽调制电路的基础上增加辅助电路，实现软开关。该电路在不增加主器件额定电流/额定电压的情况下，实现了主开关和辅助开关的软开关。为了实现滞后桥臂的零电压开关，对辅助电路进行了适当的选通。在电力变压器一次绕组中增加了分接头，以达到换相的目的。所提出的电路能够在线路和负载变化的范围内以几百千赫兹的较高开关频率工作。给出了该电路的稳态分析和损耗估算。提出了适用于稳态和动态性能的分析模型。实现了一个功率为350 W、频率为100 kHz的有源软开关PSFB DC-DC转换器样机。所提出的分析模型在350-W样机上进行了实验验证。给出了验证稳态和动态模型的实验结果。
A novel active soft switched phase-shifted full-bridge (PSFB) dc-dc converter is presented in this paper. An auxiliary circuit is added to the pulse width modulation counterpart to achieve the soft switching. The proposed circuit achieves soft switching for both main and auxiliary switches, without increasing the main device current/voltage rating. The auxiliary circuit is gated appropriately in order to achieve zero voltage switching for lagging leg. Tapping in the primary winding of power transformer is added for the purpose of commutation. The proposed circuit is capable of operating at elevated switching frequencies of several hundreds of kilohertz in a range of line and load variations. Steady-state analysis and evaluation of losses for the proposed circuit is presented. Analytical models valid for steady state and dynamic performance are proposed. A 350-W, 100-kHz active soft switched PSFB dc-dc converter prototype is implemented. The proposed analytical models are validated experimentally on 350-W prototype. Experimental results verifying steady state and dynamic models are presented.