Development of a 1 kW-class fully high-temperature superconducting induction/synchronous machine that enables non-superconducting operation

IF 1 3区物理与天体物理 Q4 PHYSICS, APPLIED

Physica C-superconductivity and Its Applications Pub Date : 2025-01-15 DOI:10.1016/j.physc.2024.1354634

Yunfei Gao , Taketsune Nakamura , Miyuki Nakamura , Takanobu Kiss

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引用次数: 0

Abstract

Fully high-temperature superconducting (HTS) rotating machines, with all windings made of high-temperature superconducting materials, have garnered significant interest due to their potential for achieving extremely high efficiency and power density. However, temperature increases caused by accidents can lead to sudden release of high-density current, risking burnout of the machine. This study presents the design, fabrication, and testing of a 1 kW-class fully HTS induction/synchronous machine (HTS-ISM) capable of operating in both superconducting and non-superconducting states. The rotor features a BSCCO/normal conductor hybrid squirrel-cage winding, while the stator uses a face-to-face double-stacked (FFDS) REBCO conductor for its three-phase winding. The 12 stator FFDS coils, with a minimum bending diameter of 17 mm, achieved a average critical current of 132 A when immersed in liquid nitrogen (77 K) and demonstrated a current-carrying capacity of at least 10 A at room temperature. Rotation tests were successfully conducted at temperatures 77 K and above 120 K, confirming superconducting and normal conducting operations. These results demonstrate the feasibility of a fully HTS-ISM capable of reduced-power operation even during cooling system failure, which is crucial for applications in electric aircraft.

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研制1千瓦级全高温超导感应/同步电机，实现非超导操作

全高温超导（HTS）旋转机器的所有绕组都由高温超导材料制成，由于它们具有实现极高效率和功率密度的潜力，已经引起了人们的极大兴趣。然而，意外造成的温度升高可能导致高密度电流的突然释放，有可能导致机器烧毁。本研究介绍了一种能在超导和非超导状态下工作的1千瓦级全高温超导感应/同步电机（HTS- ism）的设计、制造和测试。转子采用BSCCO/普通导体混合鼠笼绕组，定子采用面对面双堆叠（FFDS） REBCO导体进行三相绕组。12个定子FFDS线圈，最小弯曲直径为17 mm，浸泡在液氮（77 K）中时，平均临界电流为132 a，室温下载流能力至少为10 a。在77 K和120 K以上的温度下成功进行了旋转试验，确认了超导和正常导电的操作。这些结果表明，即使在冷却系统发生故障时，完全HTS-ISM也能够降低功率运行，这对电动飞机的应用至关重要。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Physica C-superconductivity and Its Applications 物理-物理：应用

CiteScore

2.70

自引率

11.80%

发文量

102

审稿时长

66 days

期刊介绍： Physica C (Superconductivity and its Applications) publishes peer-reviewed papers on novel developments in the field of superconductivity. Topics include discovery of new superconducting materials and elucidation of their mechanisms, physics of vortex matter, enhancement of critical properties of superconductors, identification of novel properties and processing methods that improve their performance and promote new routes to applications of superconductivity. The main goal of the journal is to publish: 1. Papers that substantially increase the understanding of the fundamental aspects and mechanisms of superconductivity and vortex matter through theoretical and experimental methods. 2. Papers that report on novel physical properties and processing of materials that substantially enhance their critical performance. 3. Papers that promote new or improved routes to applications of superconductivity and/or superconducting materials, and proof-of-concept novel proto-type superconducting devices. The editors of the journal will select papers that are well written and based on thorough research that provide truly novel insights.