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首页> 外文期刊>Power Electronics, IEEE Transactions on >Common-Duty-Ratio Control of Input-Parallel Output-Parallel (IPOP) Connected DC–DC Converter Modules With Automatic Sharing of Currents
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Common-Duty-Ratio Control of Input-Parallel Output-Parallel (IPOP) Connected DC–DC Converter Modules With Automatic Sharing of Currents

机译：具有自动均流功能的输入并联输出并联（IPOP）连接的DC-DC转换器模块的占空比控制

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摘要

Input-parallel output-parallel (IPOP) connected converter systems allow the use of low-power converter modules for high-power applications, with interleaving control scheme resulting in smaller filter size, better dynamic performance, and higher power density. In this paper, a new IPOP converter system is proposed, which consists of multiple dual-active half-bridge (DAHB) dc-dc converter modules. Moreover, by applying a common-duty-ratio control scheme, without a dedicated current-sharing controller, the automatic sharing of input currents or load currents is achieved in the IPOP converter even in the presence of substantial differences of 10% in various module parameters. The current-sharing performance of the proposed control method is analyzed using both a small-signal model and a steady-state dc model of the IPOP system. It is concluded that the equal sharing of currents among modules can be achieved by reducing the mismatches in various module parameters, which is achievable in practice. The current-sharing performance of the IPOP converter is also verified by Saber simulation and a 400-W experimental prototype consisting of two DAHB modules. The common-duty-ratio control method can be extended to any IPOP system that consists of three or more converter modules, including traditional dual-active bridge dc-dc converters, which have a characteristic of current source.
机译：输入-并行输出-并行（IPOP）连接的转换器系统允许将低功率转换器模块用于大功率应用，其交织控制方案可实现更小的滤波器尺寸，更好的动态性能和更高的功率密度。本文提出了一种新的IPOP转换器系统，该系统由多个双有源半桥（DAHB）DC-DC转换器模块组成。此外，通过应用通用占空比控制方案，而无需专用的电流共享控制器，即使在各种模块参数存在10％的实质差异的情况下，也可以在IPOP转换器中自动共享输入电流或负载电流。使用IPOP系统的小信号模型和稳态dc模型分析了所提出的控制方法的均流性能。结论是，通过减少各种模块参数中的失配可以实现模块之间电流的均等分配，这在实践中是可以实现的。 Sabre仿真和由两个DAHB模块组成的400W实验原型也验证了IPOP转换器的均流性能。通用占空比控制方法可以扩展到由三个或更多转换器模块组成的任何IPOP系统，包括具有电流源特性的传统双有源桥式DC-DC转换器。

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