This article presents a novel high gain soft-switching DC-DC converter with low component count and low voltage stress across switching devices. The proposed converter employs coupled inductor and voltage multiplier techniques to achieve high gain at low duty and low turn ratios. An active clamp circuit is also used to reduce voltage stress across the switch. As a result, lower voltage rating switches having lower on-state resistance (R_ds-on) are used, lowering system cost. It also helps to achieve zero voltage switching (ZVS) turn-on across both MOSFETs, reducing switching losses and improving efficiency. The leakage energy of the coupled inductor is recycled to improve the voltage gain, and the quasi resonance formed by the leakage inductance and switched capacitors helps to achieve zero current switching (ZCS) across diodes. This also helps in controlling the falling rate of output diode current, helping to mitigate the reverse recovery problem. The steady-state analysis has been carried out. A 500W prototype of the proposed converter is built up and tested to validate the working of the converter.

本文介绍了一种新型高增益软开关 DC-DC 转换器，该转换器具有低元件数量和跨开关器件的低电压应力。所提出的转换器采用耦合电感器和电压倍增器技术，以在低占空比和低匝数比下实现高增益。有源钳位电路也用于降低开关两端的电压应力。因此，较低额定电压的开关具有较低的通态电阻（R _ds-on) 被使用，降低了系统成本。它还有助于在两个 MOSFET 上实现零电压开关 (ZVS) 开通，从而降低开关损耗并提高效率。耦合电感的泄漏能量被回收以提高电压增益，并且由泄漏电感和开关电容器形成的准谐振有助于实现二极管两端的零电流开关（ZCS）。这也有助于控制输出二极管电流的下降率，有助于缓解反向恢复问题。进行了稳态分析。建立并测试了所提出转换器的 500W 原型，以验证转换器的工作。