Compared to the traditional aircraft, electrification of power system in aircraft has potential to revolutionise the aviation industry. Typically, more-electric aircraft (MEA), even all-electric aircraft has been developed and delivered to decrease the greenhouse gas emission and increase the energy efficiency. The next generation of MEA will operate at high voltage to facilitate the transfer of significant levels of electrical power in an electrified aircraft. However, the higher voltage inevitably leads to an increased risk to the insulation of the electrical components and power system. This study aims to provide a critical overview of the insulation challenges from the perspective of electrified aircraft, typically MEA application. The development of MEA and the special working conditions are explained at the beginning. Then the insulation challenges of power modules, electric machines, aeronautical cables etc. are discussed in detail. Finally, the existing technical barriers and future prospects of insulation for electrified aircraft are summarised. It provides a reference for the future design and test in power system of next generation MEA and related electrified air transportations.

中文翻译：

---

飞机电气化的绝缘挑战综述

与传统飞机相比，飞机动力系统的电气化具有彻底改变航空业的潜力。通常，已经开发和交付多电飞机 (MEA)，甚至全电动飞机，以减少温室气体排放并提高能源效率。下一代 MEA 将在高压下运行，以促进电气化飞机中大量电力的传输。然而，更高的电压不可避免地导致电气元件和电力系统的绝缘风险增加。本研究旨在从电气化飞机（通常是 MEA 应用）的角度对绝缘挑战进行重要概述。MEA的发展和特殊的工作条件在开头进行了说明。然后详细讨论了功率模块、电机、航空电缆等的绝缘挑战。最后，总结了电动飞机绝缘的现有技术壁垒和未来前景。为未来下一代MEA及相关电气化航空运输动力系统的设计和试验提供了参考。