Measurement of AC loss down to 25 K in a REBCO racetrack coil for electrical aircraft motor
Abstract The development of full superconducting motors for electric distributed aircraft propulsion requires to test the stator coils at the operation temperature, usually between 20 and 40 K. Here, we study the AC loss of a test racetrack coil made of REBCO tape. We developed a measurement system...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2022-09-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-20625-6 |
| _version_ | 1818024754657886208 |
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| author | J. Kováč Ľ. Kopera E. Pardo T. Melišek R. Ries E. Berberich S. Wolfstädler T. Reis |
| author_facet | J. Kováč Ľ. Kopera E. Pardo T. Melišek R. Ries E. Berberich S. Wolfstädler T. Reis |
| author_sort | J. Kováč |
| collection | DOAJ |
| description | Abstract The development of full superconducting motors for electric distributed aircraft propulsion requires to test the stator coils at the operation temperature, usually between 20 and 40 K. Here, we study the AC loss of a test racetrack coil made of REBCO tape. We developed a measurement system within a non-metallic cryostat where a cryocooler cools the test coil in combination with liquid or solid nitrogen. We present transport AC loss measurements by electrical means down to 25 K for current amplitudes up to 140 A and frequency 18–576 Hz. The AC loss increased with second power with current, and did not depend on frequency or temperature. Later, we measured the AC parallel magnetization loss in a stack of tapes made of the same material as the coil, and in a stack of tapes without superconducting layer. The results in both samples is almost identical and presents the same behavior as the coil. We conclude that the main contribution to the AC loss in the tape stack and in the coil was from the magnetism of the Hastelloy substrate or buffer layers. Therefore, researchers need to take this into account in tape production and in superconducting motor design. |
| first_indexed | 2024-12-10T04:05:15Z |
| format | Article |
| id | doaj.art-c01c75bf974a4af58f89ecaaf8afdd14 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-10T04:05:15Z |
| publishDate | 2022-09-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-c01c75bf974a4af58f89ecaaf8afdd142022-12-22T02:02:52ZengNature PortfolioScientific Reports2045-23222022-09-011211910.1038/s41598-022-20625-6Measurement of AC loss down to 25 K in a REBCO racetrack coil for electrical aircraft motorJ. Kováč0Ľ. Kopera1E. Pardo2T. Melišek3R. Ries4E. Berberich5S. Wolfstädler6T. Reis7Institute of Electrical Engineering, Slovak Academy of Sciences, V.V.I.Institute of Electrical Engineering, Slovak Academy of Sciences, V.V.I.Institute of Electrical Engineering, Slovak Academy of Sciences, V.V.I.Institute of Electrical Engineering, Slovak Academy of Sciences, V.V.I.Institute of Electrical Engineering, Slovak Academy of Sciences, V.V.I.Oswald Elektromotoren GmbHOswald Elektromotoren GmbHOswald Elektromotoren GmbHAbstract The development of full superconducting motors for electric distributed aircraft propulsion requires to test the stator coils at the operation temperature, usually between 20 and 40 K. Here, we study the AC loss of a test racetrack coil made of REBCO tape. We developed a measurement system within a non-metallic cryostat where a cryocooler cools the test coil in combination with liquid or solid nitrogen. We present transport AC loss measurements by electrical means down to 25 K for current amplitudes up to 140 A and frequency 18–576 Hz. The AC loss increased with second power with current, and did not depend on frequency or temperature. Later, we measured the AC parallel magnetization loss in a stack of tapes made of the same material as the coil, and in a stack of tapes without superconducting layer. The results in both samples is almost identical and presents the same behavior as the coil. We conclude that the main contribution to the AC loss in the tape stack and in the coil was from the magnetism of the Hastelloy substrate or buffer layers. Therefore, researchers need to take this into account in tape production and in superconducting motor design.https://doi.org/10.1038/s41598-022-20625-6 |
| spellingShingle | J. Kováč Ľ. Kopera E. Pardo T. Melišek R. Ries E. Berberich S. Wolfstädler T. Reis Measurement of AC loss down to 25 K in a REBCO racetrack coil for electrical aircraft motor Scientific Reports |
| title | Measurement of AC loss down to 25 K in a REBCO racetrack coil for electrical aircraft motor |
| title_full | Measurement of AC loss down to 25 K in a REBCO racetrack coil for electrical aircraft motor |
| title_fullStr | Measurement of AC loss down to 25 K in a REBCO racetrack coil for electrical aircraft motor |
| title_full_unstemmed | Measurement of AC loss down to 25 K in a REBCO racetrack coil for electrical aircraft motor |
| title_short | Measurement of AC loss down to 25 K in a REBCO racetrack coil for electrical aircraft motor |
| title_sort | measurement of ac loss down to 25 k in a rebco racetrack coil for electrical aircraft motor |
| url | https://doi.org/10.1038/s41598-022-20625-6 |
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