A voltage-quadrupler interleaved bidirectional dc–dc converter with intrinsic equal current sharing is presented in this article. The proposed converter offers a wide voltage conversion ratio, which makes it suitable for interconnecting the energy storage unit with dc bus for electric vehicle applications. A high voltage gain and low voltage stress across switches are achieved by adopting the capacitive voltage-divider stage, which enables the designer to employ a low-voltage switch with a small on-resistance RDS(ON). As a result, it allows the converter to run more efficiently and cooler. An interleaved connection at the low-voltage side paves the way for reducing the current ripple, which reduces the filter size and increases the power-density. Moreover, a built-in equal current sharing is achieved for two interleaved phases without using a current-sharing control scheme. The operating principle, steady-state characteristics including the current and voltage stress of the switches, and comparison with other state-of-the-art bidirectional converters are carried out in detail. Finally, to verify theoretical analysis, a 2-kW scaled-down laboratory prototype of the proposed converter using Gallium-Nitride switches is implemented.

中文翻译：

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一种用于电动汽车的具有固有均流特性的四倍频器交错式双向 DC-DC 转换器

本文介绍了一种具有本征均等电流共享的电压四倍频器交错式双向 DC-DC 转换器。所提出的转换器提供了宽电压转换比，这使其适用于将储能单元与直流总线互连，用于电动汽车应用。通过采用电容分压器级实现开关的高电压增益和低电压应力，使设计人员能够采用导通电阻 RDS(ON) 小的低压开关。因此，它允许转换器更高效、更凉爽地运行。低压侧的交错连接为降低电流纹波铺平了道路，从而减小了滤波器尺寸并提高了功率密度。而且，在不使用均流控制方案的情况下，为两个交错的相位实现了内置的均流。详细介绍了工作原理、稳态特性，包括开关的电流和电压应力，以及与其他最先进的双向转换器的比较。最后，为了验证理论分析，实现了所提出的使用氮化镓开关的转换器的 2 kW 缩小实验室原型。