Influence of the critical current on the levitation force of stacks of coated conductor superconducting tapes

Abstract

The majority of superconducting levitation systems are based on bulk superconductors. However, recently, stacks of coated conductor superconducting tapes (CC-tapes) have shown a proven potential to act as an alternative to superconducting bulks as components of a magnetic levitation system. This work primarily focuses on the influence of the critical current density on the levitation force of stacks of CC-tapes. The levitation force was measured for stacks of tapes made by different manufacturers, with different values of the critical current and substrate thickness. In our experiment, we used superconducting tapes manufactured by SuperOx, Theva and Sunam. The tapes were cut into 12 mm square pieces. The number of layers in the stack ranged from 10 to 100. Levitation forces were studied for all types of tapes and for various numbers of layers in the stack. As expected, it was found that a higher critical current corresponds to a higher levitation force. The levitation force of the stacks assembled from tapes with a higher critical current tends to saturate for lower numbers of elements in the stack.

Physical principles of development of magneto-levitation systems based on the second generation high temperature superconducting composites (Review)

“…Detailed studies of the effect of critical current for the magnetic levitation characteristics in various cooling modes were performed in [77]. In this work, the levitation force was measured by using the example of HTS-belts made by different manufacturers, and differing by critical current and the substrate thickness (therefore, by engineering current densitythe current divided by the total crosssection of the belt).…”

The influence of temperature on levitation properties of CC-tape stacks

“…Due to their qualities, CC-tapes have recently become the object of close attention. There are many studies devoted to the investigation of levitation suspensions [3,11], motors [12], the magnetization of stack [13], the influence of the number and configuration of elements on the characteristics of the stack [14,15], the effect of external influence on the levitation properties [16,17], influence of critical current and critical current density on levitation characteristics of CC-tapes [18], as well as research of lateral force in the magnetic system with CC tape stacks [19].…”

Вихревая Структура ВТСП В Неоднородном Магнитном Поле

“…В работе [17] систематически исследовались магнитные свойства стопки ВТСП-лент, получены кривые намагниченности при различной температуре и числе лент N в стопке, измерена сила левитации. Подробнее аналогичные данные получены также для отдельных ВТСП-лент и стопок ВТСП-лент, представляющих собой наборную конструкцию с многочисленными слоями ВТСП [18][19][20][21]. Показано, что величина остаточной намагниченности выходит на насыщение, а скорость релаксации остаточной намагниченности падает при увеличении N. В серии работ [22,23] разработан метод для расчета кривых намагниченности и силы левитации сверхпроводника второго рода, помещенного в однородное и неоднородное магнитное поле.…”