块体YBCO超导体中悬浮力与振荡磁悬浮场频率的关系
Dependence of Levitation Force on Frequency of an Oscillating Magnetic Levitation Field in a Bulk YBCO Superconductor
摘要：
本文研究了熔融织构单畴YBCO超导盘悬浮所需的磁场强度与产生悬浮磁场的电流频率的关系。发现磁场强度在10和300 Hz之间与频率无关。这个所需的磁场强度被发现与用非振荡磁场悬浮相同超导体所需的磁场强度在实验和理论上有很好的一致性[1]。Bean临界状态模型[2]预测的超导体内的滞后损耗也被计算出来。测量数据排除了在测量频率范围内Bean模型对所需悬浮场强的任何显著影响。
英文摘要：
The dependence of the magnetic field strength required for levitation of a melt textured, single domain YBCO superconductor disc on the frequency of the current generating the levitating magnetic field has been investigated. The magnetic field strength is found to be independent of frequency between 10 and 300 Hz. This required field strength is found to be in good experimental and theoretical[1] agreement with the field strength required to levitate the same superconductor with a non-oscillating magnetic field. Hysteretic losses within the superconductor predicted by Bean's critical-state model[2] were also calculated. The measured data rules out any significant Bean's model effects on the required levitation field strength within the measured frequency range.
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