GB/T 30109-2013 in English

《GB/T 30109-2013交流损耗测量 液氦温度下横向交变磁场中圆形截面超导线总交流损耗的探测线圈测量法》由TC265（全国超导标准化技术委员会）归口，主管部门为中国科学院。
本标准规定了利用探测线圈法测量横向交变磁场中复合超导线总交流损耗的方法。损耗可能包括磁滞损耗、耦合损耗和涡流损耗。IEC61788-13已描述了只测量直流磁场或者低扫速率磁场中磁滞损耗的标准方法[2]。
本标准适用于脉冲线圈和交流线圈中的金属和氧化物圆形截面超导线,在随时间变化(时变)的磁场和/或电流的应用中会产生交流损耗。在常规线圈应用的电磁位形中,交流损耗主要来自(时变)磁
场。对于处于横向交变磁场中的超导线,本方法通常用在液氦温度、频率范围上限可达工频50/60Hz
的总交流损耗测量。采纳本方法测量的总交流损耗分为超导单丝中的磁滞损耗、丝间的耦合损耗和常导部分的涡流损耗。在超导线外没有厚度较大的正常导体包套的情况下,交流损耗主要是磁滞损耗和耦合损耗;由于每周耦合损耗与频率成正比,磁滞损耗部分可以通过在较低频率范围内所测得的交流损耗外推至频率为零时的损耗估算得到。

Scope

This standard specifies the method for measuring the total AC loss of composite superconducting wires in a transverse alternating magnetic field using the detection coil method. Losses may include hysteresis losses, coupling losses, and eddy current losses. IEC 61788-13 has described a standard method for measuring hysteresis loss only in dc fields or in fields with low scan rates [2]. This standard applies to metal and oxide circular cross-section superconducting wires in pulse coils and AC coils, where AC losses occur in the application of time-varying (time-varying) magnetic fields and/or currents. In the electromagnetic configuration of conventional coil applications, the AC losses mainly come from the (time-varying) magnetic field. For a superconducting wire in a transverse alternating magnetic field, this method is usually used for the measurement of the total AC loss at the temperature of liquid helium and the upper limit of the frequency range up to power frequency 50/60 Hz. The total AC loss measured by this method is divided into the hysteresis loss in the superconducting single wire, the coupling loss between the wires and the eddy current loss in the constant conduction part. In the case that there is no normal conductor sheath with a large thickness outside the superconducting wire, the AC loss is mainly hysteresis loss and coupling loss; since the coupling loss per cycle is proportional to the frequency, the hysteresis loss part can pass through in the lower frequency range. The measured ac loss is extrapolated to an estimate of the loss at zero frequency.