期刊
MATERIALS
卷 14, 期 24, 页码 -出版社
MDPI
DOI: 10.3390/ma14247555
关键词
partial discharges; insulation design; aircraft; motor; inverter-feeded machine; corona-resistant material
类别
资金
- Advanced Research Projects Agency-Energy (ARPA-E) under the Aviation-Class Synergistically Cooled Electric-Motors with Integrated Drives (ASCEND) [DE-FOA-0002238]
Designing insulation systems for motors in electrical aircraft involves balancing efforts to maximize specific power and achieve high reliability, particularly in addressing the risk of partial discharges. The use of optimized or conservative design approaches can provide specified lifespan and potentially reduce the risk of partial discharges. Advanced, corona-resistant materials may be necessary to reach a higher level of reliability.
Designing the insulation system for motors to be used in electrical aircraft requires efforts for maximizing specific power, but, in parallel, particular attention to achieve high reliability. As a major harm for organic insulation systems is partial discharges, design must be able to infer their likelihood during any operation stage and handle their potential inception. This paper proposes a new approach to carry out optimized or conservative insulation system designs which can provide the specified life at the chosen failure probability as well as look at the option of possibly reducing the risk of partial discharges to zero, at any altitude. Examples of designing turn, phase to ground and phase-to-phase insulation systems are reported, with cases where the design can be optimized and other cases where the optimized design does not pass IEC testing standard. Therefore, the limits for design feasibility as a function of the required level of safety and reliability are discussed, showing that the presence of partial discharges cannot be always avoided even through conservative design criteria. Therefore, the use of advanced, corona-resistant materials must be considered, in order to reach a higher, sometimes redundant, level of reliability.
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