Abstract
The previous researches show that the temperature rises inside the high temperature superconducting (HTS) bulk will affect the levitation performance of the HTS bulk. In order to further explore the relationship between the internal temperature rise and the levitation force of the HTS bulk, a thermal-dynamic levitation force coupling measurement device is reformed, and the Halbach PM wheel is used to generate alternating MF at field cooling height (FCH) 30/40 mm, working height (WH) 8/12 mm and speed from 500 rpm to 3500 rpm with intervals of 500 rpm, to study the influence of MF fluctuation on the temperature rise and levitation force of the HTS bulk. The temperature values are obtained when the levitation force decays greatly (82 K) and fails (87 K). The experimental results can provide theoretical suggestions for the irregularity standard of PMG and reference for the protection of the HTS pinning maglev system.
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