Thermal-Electromagnetic Coupled Analysis Considering AC Losses in REBCO Windings at 65 K of 10 MW Fully-Superconducting Synchronous Generators for Electric Aircraft
Thermal-Electromagnetic Coupled Analysis Considering AC Losses in REBCO Windings at 65 K of 10 MW Fully-Superconducting Synchronous Generators for Electric Aircraft
复制标题
考虑 65 K 电动飞机 10 MW 全超导同步发电机 REBCO 绕组交流损耗的热电磁耦合分析
DOI：
10.1109/tasc.2022.3160660
复制
发表时间：
2022
影响因子：
1.8
通讯作者：
Izumi Teruo
中科院分区：
文献类型：
--
作者：
Sasa Hiromasa;Miura Shun;Miyazaki Hiroshi;Sasayama Teruyoshi;Yoshida Takashi;Yamamoto Kaoru;Iwakuma Masataka;Hase Yoshiji;Sasamori Yuichiro;Honda Hirokazu;Konno Msayuki;Izumi Teruo
由REBa 2Cu 3 Oy（REBCO，RE =稀土、Eu、Gd等）组成的电枢绕组中产生较大的交流损耗全超导同步发电机中的导线。在飞机应用中，液氮由于其比热容和介电强度而适合用于冷却绕组。液态制冷剂的蒸发显著降低了介电强度，这导致排放事故的风险增加。为了安全运行，发生器中的温度设置为低于氮气的沸点（1077 K）。我们通过应用从实验结果估计AC损耗的方法来计算AC损耗等引起的温度上升。本文采用有限元电磁-热分析方法计算了超导发电机的温升，证明了液氮冷却超导发电机的可行性，即温度保持在77 K以下。输出功率为10 MW。假设液氮的温度为65 K，并将其流速设定为参数。此外，我们证实，设计一种方法，确定考虑温升的REBCO绕组的并联导体的数量可以提高输出功率密度。
A large AC loss is generated in armature windings composed of a REBa2Cu3Oy(REBCO, RE = rare earth, Eu, Gd, etc.) wire in a fully superconducting synchronous generator. In aircraft applications, liquid nitrogen is suitable for cooling windings because of its specific heat capacity and dielectric strength. The evaporation of liquid refrigerant significantly decreases the dielectric strength, which results in an increase in the risk of accidents by discharging. For safe operation, the temperature in the generator is set below the boiling point of nitrogen (∼77 K). We calculated the temperature rise caused by the AC loss and others by applying a method that estimates the AC loss from the experimental results. This paper addresses the electromagnetic-thermal analysis in finite element method to calculate the temperature rise and proves the feasibility of a fully superconducting generator cooled by liquid nitrogen, that is, the temperature is maintained below 77 K. The output power is 10 MW. The temperature of liquid nitrogen was assumed to be 65 K, and its flow speed was set as a parameter. Additionally, we confirmed that designing a method that determines the number of parallel conductors of REBCO windings considering the temperature rise can enhance the output power density.