Increasing demand for commercial air travel is projected to have additional environmental impact through increased emissions from fuel burn. This has necessitated the improvement of aircraft propulsion technologies and proposal of new concepts to mitigate this impact. The hybrid-electric aircraft propulsion system has been identified as a potential method to achieve this improvement. However, there are many challenges to overcome. One such challenges is the combination of electrical power sources and the best strategy to manage the power available in the propulsion system. Earlier methods reviewed did not quantify the mass and efficiency penalties incurred by each method, especially at system level. This work compares three power management approaches on the basis of feasibility, mass and efficiency. The focus is on voltage synchronisation and adaptation to the load rating. The three methods are the regulated rectification, the generator field flux variation and the buck-boost. This comparison was made using the propulsion system of the propulsive fuselage aircraft concept as the reference electrical configuration. Based on the findings, the generator field flux variation approach appeared to be the most promising, based on a balance of feasibility, mass and efficiency, for a 2.6MW system.

中文翻译：

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混合动力飞机推进系统的电压同步

预计对商业航空旅行的日益增长的需求将通过增加燃料燃烧产生的排放对环境产生额外的影响。这就需要改进飞机推进技术并提出新概念来减轻这种影响。混合电动飞机推进系统已被确定为实现这一改进的潜在方法。然而，有许多挑战需要克服。此类挑战之一是电源和管理推进系统中可用功率的最佳策略的组合。早期审查的方法没有量化每种方法所产生的质量和效率损失，尤其是在系统级别。这项工作在可行性、质量和效率的基础上比较了三种电源管理方法。重点是电压同步和适应额定负载。三种方法是稳压整流、发电机磁场通量变化和升降压。这种比较是使用推进机身飞机概念的推进系统作为参考电气配置进行的。根据研究结果，基于可行性、质量和效率的平衡，对于 2.6MW 系统，发电机磁场通量变化方法似乎是最有希望的。