AC Losses of Superconducting Racetrack Coil in Various Magnetic Conditions
AC Losses of Superconducting Racetrack Coil in Various Magnetic Conditions
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DOI：
10.1109/tasc.2010.2084065
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发表时间：
2011-06
影响因子：
1.8
通讯作者：
Z. Hong;W. Yuan;M. Ainslie;Y. Yan;R. Pei;T. Coombs
中科院分区：
文献类型：
--
作者：
Z. Hong;W. Yuan;M. Ainslie;Y. Yan;R. Pei;T. Coombs
高温超导体为电力应用技术的跨越式变革创造了机会。由 YBCO 涂层导体制成的跑道型超导线圈已用于多种工程应用，包括 SMES、电机的转子或定子绕组。交流损耗是决定超导器件设计和性能的最重要因素之一。本文开发了一个数值模型来计算不同磁条件下超导跑道线圈的交流损耗。本文首先讨论了线圈在自场或仅外场下的交流损耗。然后研究暴露于交流纹波场和直流背景场的线圈的交流损耗。最后，计算承载直流电流并暴露于交流场的线圈的交流损耗。这两种情况对应于使用超导线圈作为电机的转子磁场绕组。
High-temperature superconductors have created the opportunity for a step change in the technology of power applications. Racetrack superconducting coils made from YBCO coated conductors have been used in several engineering applications including SMES, rotor or stator windings of electric machines. AC loss is one of the most important factors that determine the design and performance of superconducting devices. In this paper, a numerical model is developed to calculate the AC losses in superconducting racetrack coils in different magnetic conditions. This paper first discusses the AC losses of the coils in self-field or external field only. It then goes to investigate the AC losses of the coils being exposed to AC ripple field and a DC background field. Finally, the AC losses of the coils carrying DC current and being exposed to AC field are calculated. These two scenarios correspond to using superconducting coils as the rotor field winding of an electric machine.