Electrical machines and drives keep moving away from traditional technologies such as brushed machines and wound field machines toward lighter, “easier to maintain” machines. A very interesting aspect is that certain transport applications, especially the aerospace industry, still favor the classical wound field machine for its main generating system such as Boeing 787. This article focuses on investigating this particular trend by presenting a detailed overview of the historical power-generation systems on aircraft. This article compares the current state of the art of wound field machines with other generator families. The results of this analysis are then projected into the needs of the electrical power generation and distribution system on aircraft. Although power density is a major objective for any aerospace application, however, the extra benefits associated with wound field systems are still essential in modern aircraft. This article then focuses on the main challenges for improving the power density of wound field machines. Recommendations, opportunities, and improvements related to wound field machines are discussed. In conclusion, if robust designs for higher speed wound field generators were consolidated, it would be very probable that these classical machines might still be implemented on future More Electric Aircraft (MEA) platforms.

中文翻译：

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未来更多电动飞机绕场同步发电机的挑战与机遇

电机和驱动器不断从传统技术（如刷式机器和绕线式机器）转向更轻、“更易于维护”的机器。一个非常有趣的方面是，某些运输应用，尤其是航空航天工业，仍然偏爱经典的绕线机作为其主要发电系统，例如波音 787。本文通过详细介绍历史功率-飞机上的发电系统。本文比较了绕线机与其他发电机系列的当前技术水平。然后将该分析的结果投射到飞机上的发电和配电系统的需求中。尽管功率密度是任何航空航天应用的主要目标，但是，与伤口场系统相关的额外好处在现代飞机中仍然必不可少。然后，本文重点介绍提高绕线机功率密度的主要挑战。讨论了与伤口现场机器相关的建议、机会和改进。总之，如果针对更高速的绕线场发生器的稳健设计得到巩固，这些经典机器很可能仍会在未来的更多电动飞机 (MEA) 平台上实施。