The AC current loss of a meander-shaped QMG current limiting device was measured. Although the frequency was changed in the range of 35–200 Hz, an obvious frequency dependence of the AC current loss was not observed. Hence, the pinning loss is dominant in the observed AC current loss. The specimen seemed to be homogeneous and not to be damaged during a manufacturing process, since the voltages in the measured sections were nearly the same and the energy loss density coincided with the result on the bridge specimen. The experimental result of the AC loss agreed well with Norrisu27s formula for an elliptic cross-section. However, the theoretical prediction by Irie–Yamafujiu27s model does not agree well with experimental result.
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