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高温超导带材在磁场中传输交变电流时,将受到电磁力的作用而产生机械振动,振动对带材的交流损耗将产生影响.本文讨论了振动情况下交流损耗的测量方法,在平行于带面的直流磁场下,测量了Bi-2223/Ag高温超导带材在不同振动情况下的交流损耗.结果显示:当传输电流频率偏离样品的共振频率时,振动对带材的交流损耗影响不大;只有当电流频率在共振频率附近时,样品产生剧烈振动,交流损耗才有明显的增加;另外,带材振动时的交流损耗随频率变化曲线的斜率比不振动时略有增加.
High temperature superconducting tape in the transmission of alternating current in the magnetic field will be subject to the electromagnetic force generated by mechanical vibration, vibration on the tape AC loss will have an impact.This article discusses the measurement of AC loss under vibration conditions, in parallel The AC loss of Bi-2223 / Ag high temperature superconducting tape under different vibration conditions was measured under DC magnetic field with surface. The results show that when the transmission current frequency deviates from the resonance frequency of the sample, the AC loss of the tape Only when the current frequency in the vicinity of the resonant frequency, the sample produced severe vibration, AC loss was significantly increased; In addition, the strip when the vibration amplitude of the AC loss versus frequency curve when the slope is slightly increased without vibration.