Numerical Modeling of Iron Yoke Levitation Using the Pinning Effect of High-Temperature Superconductors
A ferromagnetic material can be levitated by the pinning effect of a field-cooled superconductor. This paper presents two methods for modeling this effect: 1) an approximate calculation to determine the relationship between attractive force and air gap at both room temperature and superconductive te...
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| Veröffentlicht in: | IEEE transactions on magnetics 2007-05, Vol.43 (5), p.2001-2008 |
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| container_issue | 5 |
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| container_title | IEEE transactions on magnetics |
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| creator | Ghodsi, M. Ueno, T. Teshima, H. Hirano, H. Higuchi, T. |
| description | A ferromagnetic material can be levitated by the pinning effect of a field-cooled superconductor. This paper presents two methods for modeling this effect: 1) an approximate calculation to determine the relationship between attractive force and air gap at both room temperature and superconductive temperature (77 K) and 2) a novel way of modeling the pinning effect by a finite-element method (FEM). A comparison of analytical and FEM results with experimental results verifies the validity of the methods. The methods can be used to estimate the system's behavior when the cylindrical yoke is replaced by a ring yoke. The stiffness of the system will increase by 70% (to 5.3 N/mm) when a ring yoke with the same surface area is used instead of a cylindrical yoke |
| doi_str_mv | 10.1109/TMAG.2006.890218 |
| format | Article |
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This paper presents two methods for modeling this effect: 1) an approximate calculation to determine the relationship between attractive force and air gap at both room temperature and superconductive temperature (77 K) and 2) a novel way of modeling the pinning effect by a finite-element method (FEM). A comparison of analytical and FEM results with experimental results verifies the validity of the methods. The methods can be used to estimate the system's behavior when the cylindrical yoke is replaced by a ring yoke. 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This paper presents two methods for modeling this effect: 1) an approximate calculation to determine the relationship between attractive force and air gap at both room temperature and superconductive temperature (77 K) and 2) a novel way of modeling the pinning effect by a finite-element method (FEM). A comparison of analytical and FEM results with experimental results verifies the validity of the methods. The methods can be used to estimate the system's behavior when the cylindrical yoke is replaced by a ring yoke. 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This paper presents two methods for modeling this effect: 1) an approximate calculation to determine the relationship between attractive force and air gap at both room temperature and superconductive temperature (77 K) and 2) a novel way of modeling the pinning effect by a finite-element method (FEM). A comparison of analytical and FEM results with experimental results verifies the validity of the methods. The methods can be used to estimate the system's behavior when the cylindrical yoke is replaced by a ring yoke. The stiffness of the system will increase by 70% (to 5.3 N/mm) when a ring yoke with the same surface area is used instead of a cylindrical yoke</abstract><cop>New York, NY</cop><pub>IEEE</pub><doi>10.1109/TMAG.2006.890218</doi><tpages>8</tpages></addata></record> |
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| subjects | Analytical model Approximation Cross-disciplinary physics: materials science rheology Exact sciences and technology Ferromagnetic materials field-cooled high temperature superconductor Finite element method finite-element method (FEM) High temperature superconductors Iron Magnetic levitation Magnetic materials Magnetism Materials science Mathematical analysis Mathematical models Maxwell theory numerical modeling Numerical models Other topics in materials science Permanent magnets Physics Pinning pinning effect Region 1 Region 2 shape effect Steel Superconducting magnets Superconductors Yokes |
| title | Numerical Modeling of Iron Yoke Levitation Using the Pinning Effect of High-Temperature Superconductors |
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