Study on Reduction Method of AC Loss and Optimization of HTS Coil for Rotating Machines

本研究发展了功率计法和汽化法来测量高温超导线圈的交流损耗。将这些方法应用于高温超导模型线圈交流损耗的测量。根据超导带材的交流损耗数据，建立了超导线圈交流特性分析的理论模型。实验结果表明，理论模型能很好地解释功率法和蒸发法测量模型线圈交流损耗的结果。利用该模型对旋转电机用高温超导线圈的优化设计进行了理论研究。提出了通过引入倾斜绕组来降低高温超导线圈交流损耗的方法，并通过实验验证了其降低交流损耗的效果。

Power meter method and boil-off method were developed to measure the AC loss in HTS coils in this study. These methods were applied for the AC loss measurement of HTS model coil. The theoretical model to analyze the AC in HTS coil based on the AC loss data of the HTS tape was also developed. It was confirmed that the measured results of the AC loss in the model coils by the power method and the boil-off method were well explained by the theoretical model. The optimization of the HTS coil used in a rotational machines was theoretically investigated by using the model. The reduction method of the AC loss in the HTS coil by introducing the tilt-winding was proposed and the effect of AC reduction was experimentally verified.