In this study, a new transformer-less multi-port dc–dc converter with bidirectional capability is proposed. The proposed converter has dual inputs and dual outputs in which one of the inputs is considered energy storage (ES) such as a battery. Owing to the bidirectional capability, charging and discharging of the ES are provided. In the charging mode, the energy of the regenerative braking can charge the battery. These features make the proposed converter suitable for hybrid energy systems. Continuous charging and discharging current of the battery, low normalised peak voltage stress (NPVS) on semiconductors, and step-up capability are other advantages of the proposed converter. Reduced NPVS causes the semiconductors with low turn-on resistance and reduced rating voltage to be utilised. The performance analysis of the proposed converter in charging and discharging modes is described. Finally, the performance of the converter and mathematical analysis are validated by experimental results.

中文翻译：

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双向多端口dc-dc转换器，在开关和二极管上具有低电压应力

在这项研究中，提出了一种具有双向功能的新型无变压器多端口dc-dc转换器。所提出的转换器具有双输入和双输出，其中输入之一被认为是能量存储（ES），例如电池。由于双向能力，提供了ES的充电和放电。在充电模式下，再生制动的能量可以为电池充电。这些特征使所提出的转换器适用于混合能源系统。电池的连续充电和放电电流，半导体上的低归一化峰值电压应力（NPVS）以及升压能力是该转换器的其他优点。降低的NPVS导致使用低导通电阻和降低的额定电压的半导体。描述了所提出的转换器在充电和放电模式下的性能分析。最后，通过实验结果验证了转换器的性能和数学分析。