The study on the force characteristics of Stacked Tapes Subjected to Traveling-wave Magnetic Field

The stack of HTS tapes can be magnetized as a powerful magnet like permanent magnet. It has been investigated extensively in many papers, but there are few studies about its performances in practical travelling-wave magnetic field. In our previous work, the attenuation characteristics traveling-wave magnetic field of the trapped magnetic field of a stacked-tape magnet used in linear synchronous motor has been studied. The force characteristics between stacked tape magnets and traveling-wave magnetic field are the most important parameters for high temperature superconducting linear synchronous motors (HTSLSM). In order to identify the performance and force characteristics of the HTSLSM, a simplified 2D finite element model about HTSLSM has been built up in this paper, and an experiment test system has been constructed to measure the force characteristics with different stator currents and stacked layers. The experimental result shows an agreement with simulation result. Based on this model, the influence of the number of stacked magnets on thrust was also investigated. The results help better understand the feasibility of a novel HTSLSM using stack of HTS tapes.