Experimental and Numerical Investigation of Levitation Force Parameters of Novel MultiSurface Halbach HTSPMG Arrangement for Superconducting Maglev System


ÖZTÜRK K. , Majos A. B. , Abdioglu M., DİLEK D. B. , GEDİKLİ H.

IEEE Transactions on Applied Superconductivity, 2021 (Journal Indexed in SCI Expanded) identifier

  • Publication Type: Article / Article
  • Publication Date: 2021
  • Doi Number: 10.1109/tasc.2021.3106816
  • Title of Journal : IEEE Transactions on Applied Superconductivity
  • Keywords: Cooling, Dynamic response, Force, Force measurement, High-temperature superconductors, HTS Maglev, Levitation force, Magnetic flux, Magnetic levitation, Multi-surface, Theoretical modelling, Vehicle dynamics, Vibration characteristics

Abstract

IEEEWe have designed multisurface Halbach HTSPMG arrangements for Maglev and investigated the static force parameters in addition to the dynamic response characteristics. Three different Halbach HTSPMG arrangements were used with multisurface (6 HTS, 4 HTS) and single surface (2 HTS) configurations and static and dynamic measurements were carried out in three different field cooling heights (FCH). The bigger vertical loading capacity and wider loading gap were obtained with multisurface Halbach HTSPMG arrangements. In addition, nearly four times bigger guidance force values of multi-surface arrangements than that of singlesurface one indicates that the side HTSs in multisurface arrangements make a significant contribution to the guidance force and thus lateral movement stability of Maglev systems. Both the vertical and lateral dynamic stiffness values increased with decreasing FCH and it can be also said that the dynamic stiffness properties of Maglev systems can be enhanced especially in lateral direction by using the multisurface Halbach HTSPMG arrangements. Understanding of these experimental observations is supported by dedicated theoretical modelling through a 2D approximation of the system. We show that, by using a single material parameter (the critical current density J_c) for the whole superconducting set, one may satisfactorily predict the complete series of experiments. The static and dynamic parameters obtained from this study and the results of dedicated theoretical modelling for singlesurface and multisurface HTSPMG arrangements are thought to be helpful for the researchers working on static and dynamic performances of HTS Maglev systems.