Application of coupled inductor in designing nonisolated bidirectional dc–dc converter provides flexibility to attain high voltage conversion ratio both in buck and boost mode of operation. In this article, a new coupled inductor bidirectional converter is designed with low winding turns ratio ( n = 1 ). The proposed topology uses two current path inductor structure which improves voltage conversion ratio and shares current in all operating modes. All the active switches in the proposed topology are soft switched utilizing synchronous rectification concept. Higher efficiency operation is possible as no extra circuit elements are required to achieve soft switching. Leakage energy of coupled inductor is successfully stored in a clamped capacitor which is utilized in the circuit topology. The voltage stress and current stress level of main active switches are low. The proposed circuit is simulated and performance parameters are verified through hardware results. Both simulation and experimental results performed on a 250 W prototype confirm to attain a high efficiency of the proposed converter with simple hardware requirement for practical implementation.

中文翻译：

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采用耦合电感的具有均流特性的高增益、高效率双向 DC-C 转换器


耦合电感器在设计非隔离双向 DC-DC 转换器中的应用提供了在降压和升压操作模式下获得高电压转换比的灵活性。在本文中，设计了一种新型耦合电感器双向转换器，具有低绕组匝数比（n = 1）。所提出的拓扑结构采用两个电流路径电感器结构，可提高电压转换比并在所有工作模式下共享电流。所提出的拓扑中的所有有源开关都是利用同步整流概念的软开关。由于不需要额外的电路元件来实现软开关，因此可以实现更高效率的操作。耦合电感器的泄漏能量成功地存储在电路拓扑中使用的钳位电容器中。主有源开关的电压应力和电流应力水平较低。对所提出的电路进行了仿真，并通过硬件结果验证了性能参数。在 250 W 原型上进行的仿真和实验结果均证实，所提出的转换器具有高效率，且实际实现的硬件要求简单。