In more electric aircraft (MEA), weight reduction and energy efficiency constitute the key figures. In addition, the safety and continuity of operation of its electrical power distribution system (EPDS) are of critical importance. These sets of desired features are in disagreement with each other because higher redundancy, needed to guarantee the safety of operation, implies additional weight. In fact, EPDS is usually divided into isolated sections that need to be sized for the worst case scenario. Several concepts of EPDS have been investigated, aiming at enabling the power exchange among separate sections, which allows better optimization for power and weight of the whole system. In this article, an approach based on the widespread use of multiport power converters for both dc/dc and dc/ac stages is proposed. System integration of these two is proposed as a multiport power conversion system (MPCS), which allows a ring power distribution, while galvanic isolation is still maintained, even in fault conditions. Thus, the redundancy of MEA is established by no significant weight increase. A machine design analysis shows how the segmented machine could offer superior performance to the traditional one with the same weight. Simulation and experimental verifications show the system feasibility in both normal and fault operations.

中文翻译：

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一种适用于更多电动飞机的多端口电源转换系统

在多电动飞机 (MEA) 中，重量减轻和能源效率构成了关键数字。此外，其配电系统 (EPDS) 的安全性和运行连续性至关重要。这组所需的特征彼此不一致，因为保证操作安全所需的更高冗余意味着额外的重量。事实上，EPDS 通常被分成几个独立的部分，这些部分需要针对最坏的情况进行调整。已经研究了 EPDS 的几个概念，旨在实现不同部分之间的功率交换，从而更好地优化整个系统的功率和重量。在本文中，提出了一种基于多端口电源转换器广泛用于 dc/dc 和 dc/ac 级的方法。这两者的系统集成被提议为多端口电源转换系统 (MPCS)，它允许环形配电，同时即使在故障条件下仍保持电流隔离。因此，MEA 的冗余是通过没有显着的重量增加来建立的。机器设计分析显示了分段式机器如何在相同重量的情况下提供优于传统机器的性能。仿真和实验验证显示了系统在正常和故障运行中的可行性。机器设计分析显示了分段式机器如何在相同重量的情况下提供优于传统机器的性能。仿真和实验验证显示了系统在正常和故障运行中的可行性。机器设计分析显示了分段式机器如何在相同重量的情况下提供优于传统机器的性能。仿真和实验验证显示了系统在正常和故障运行中的可行性。