A magnetic levitation rotating plate model based on high-Tc superconducting technology. (September 2017)

• Record Type: Journal Article
• Authors: Zheng, Jun; Li, Jipeng; Sun, Ruixue; Qian, Nan; Deng, Zigang
• Is Part Of: Cryogenics. Volume 86(2017)
• Page Start: 1
• Page End: 6
• Publication Date: 2017-09
• Subjects: High temperature superconductor -- Magnetic levitation -- Display model -- Rotatable plate -- Permanent magnet array; Low temperature engineering -- Periodicals; Low temperature research -- Periodicals; 536.56
• DOI: 10.1016/j.cryogenics.2017.06.002
• Languages: English
• ISSNs: 0011-2275

Abstract

Highlights: A magnetic levitation rotating plate model with HTS bulks is designed and manufactured. The circular permanent magnetic plate in Halbach array is proposed. The LN2 filling is achieved automatically by the solenoid valve and temperature sensor. Abstract: With the wide requirements of the training aids and display models of science, technology and even industrial products for the public like schools, museums and pleasure grounds, a simple-structure and long-term stable-levitation technology is needed for these exhibitions. Opportunely, high temperature superconducting (HTS) technology using bulk superconductors indeed has prominent advantages on magnetic levitation and suspension for its self-stable characteristic in an applied magnetic field without any external power or control. This paper explores the feasibility of designing a rotatable magnetic levitation (maglev) plate model with HTS bulks placed beneath a permanent magnet (PM) plate. The model is featured with HTS bulks together with their essential cryogenic equipment above and PMs below, therefore it eliminates the unclear visual effects by spray due to the low temperature coolant such as liquid nitrogen (LN2 ) and additional levitation weight of the cryogenic equipment. Besides that, a matched LN2 automation filling system is adopted to help achieving a long-term working state of the rotatable maglev plate. The key low-temperature working condition for HTS bulks is maintained by repeatedly opening a solenoid valve and automatically filling LN2 under the monitoring of a temperature sensor inside the cryostat. With the support of the cryogenic devices, the HTS maglev system can meet all requirements of the levitating display model for exhibitions, and may enlighten the research work on HTS maglev applications.