Superconducting Magnetic Bearings Simulation using an H-formulation Finite Element Model

Abstract

The modeling of superconducting magnetic bearing (SMB) is of great significance for predicting and optimizing its levitation performance before construction. Although lots of efforts have been made in this area, it still remains some space for improvements. Thus the goal of this work is to report a flexible, fast and trustworthy H-formulation finite element model. First the methodology for modeling and calibrating both bulk-type and stack-type SMB is summarized. Then its effectiveness for simulating SMBs in 2-D, 2-D axisymmetric and 3-D is evaluated by comparison with measurements. In particular, original solutions to overcome several obstacles are given: clarification of the calibration procedure for stack-type and bulk-type SMBs, details on the experimental protocol to obtain reproducible measurements, validation of the 2-D model for a stack-type SMB modeling the tapes real thickness, implementation of a 2-D axisymmetric SMB model, implementation of a 3-D SMB model, extensive validation of the models by comparison with experimental results for field cooling and zero field cooling, for both vertical and lateral movements. The accuracy of the model being proved, it has now a strong potential for speeding up the development of numerous applications including maglev vehicles, magnetic launchers, flywheel energy storage systems, motor bearings and cosmic microwave background polarimeters.

22 pages, 15 figures

References in corpus (6)

• Calculation of AC losses in stacks and coils made of second generation high temperature superconducting tapes for large scale applications
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Cited by in corpus (4)

• A new benchmark problem for electromagnetic modelling of superconductors: the high-Tc superconducting dynamo
• Implementation of the H-$\varphi$ formulation in COMSOL Multiphysics for simulating the magnetization of bulk superconductors and comparison with the H-formulation
• 3D modeling of a Superconducting Dynamo-Type Flux Pump
• Modeling the charging process of a coil by an HTS dynamo-type flux pump