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However, one of the important constraints on development of superconducting maglevs is limited wireless feeding power for on-board superconducting magnets and cryogenic cooling. In this paper, a persistent-current superconducting magnets system with solid nitrogen (SN\n                    <jats:sub>2<\/jats:sub>\n                    ) cooling preservation is proposed for liberation of its demanding on-board power feeding requirement. The magnets are optimally designed with no-insulation technique guaranteeing a safe operation with magnetic field over 0.8\u2009T. Lasting time of persistent current (at 96.5% magnetic field retained) and SN\n                    <jats:sub>2<\/jats:sub>\n                    cooling preservation (up to 40\u2009K) is all &gt;9\u2009h, covering a maglev traveling distance of &gt;5400\u2009km at average designed speed of &gt;600\u2009km\/h. The magnets have anti-vibration ability of 15\u2009g (147\u2009m\/s\n                    <jats:sup>2<\/jats:sup>\n                    ) up to 350\u2009Hz, which has covered the vibratory motion range in maglevs. This work is intended to provide a reference for superconducting maglev developments.\n                  <\/jats:p>","DOI":"10.1038\/s41598-019-48136-x","type":"journal-article","created":{"date-parts":[[2019,8,14]],"date-time":"2019-08-14T06:02:36Z","timestamp":1565762556000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":68,"title":["An on-board 2G HTS magnets system with cooling-power-free and persistent-current operation for ultrahigh speed superconducting maglevs"],"prefix":"10.1038","volume":"9","author":[{"given":"Fangliang","family":"Dong","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhen","family":"Huang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Luning","family":"Hao","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaoyong","family":"Xu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhijian","family":"Jin","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nan","family":"Shao","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2019,8,14]]},"reference":[{"key":"48136_CR1","doi-asserted-by":"publisher","first-page":"1250","DOI":"10.1109\/TEC.2016.2577058","volume":"31","author":"CB Park","year":"2016","unstructured":"Park, C. 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