This article evaluates the novel design approach of a 3 MW partially superconducting synchronous machine for electric aircraft propulsion. Its special feature is the application of an electromagnetic Halbach array for the field excitation to reduce the back yoke weight and thereby increase the overall output power density. The electromagnetic Halbach array is obtained by reproducing a permanent magnet Halbach array with high-temperature superconducting coils. The arrangement is further optimized, and its field characteristics are compared to a conventional superconducting field winding design. Even though the Halbach array has a higher space and superconductor consumption, it shows better characteristics concerning the intensity of inside and outside magnetic field. Applied in a superconducting motor, the Halbach array field winding achieves a back yoke thickness reduction of up to 85% and a back yoke weight reduction of up to 78% compared to reference models. The gravimetric power density is increased by up to 30% at the expense of volumetric power density. In exchange for a back yoke weight reduction, other components, such as field winding and cryostat, become heavier.

中文翻译：

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带Halbach阵列场激励的超导同步电机分析

本文评估了用于电动飞机推进的 3 MW 部分超导同步电机的新颖设计方法。其特点是应用电磁海尔贝克阵列进行场激励，以减轻背轭重量，从而提高整体输出功率密度。电磁海尔贝克阵列是通过用高温超导线圈再现永磁海尔贝克阵列而获得的。该布置进一步优化，并将其场特性与传统的超导场绕组设计进行比较。尽管Halbach阵列具有更高的空间和超导体消耗，但它在内外磁场强度方面表现出更好的特性。应用于超导电机，与参考型号相比，Halbach 阵列励磁绕组可将背轭厚度减少多达 85%，并将背轭重量减少多达 78%。以体积功率密度为代价，重量功率密度提高了 30%。作为减轻背轭重量的交换，其他组件，如励磁绕组和低温恒温器，变得更重。