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高温超导材料的实际应用中其装置两端的电压保持恒定,而现有的研究都是建立在恒流的基础上。基于此,通过建立恒压下Bi2223/Ag高温超导带材的一维失超传播模型,用数值模拟方法研究了Bi2223/Ag高温超导带在恒压作用下的失超传播行为。通过计算给出了Bi2223/Ag带材在恒压下的最小失超能(MQE)、失超传播速度(NZPV)及其变化规律,同时对恒流和恒压两种条件下的失超行为进行了对比,发现恒压下的最小失超能明显小于恒流下的最小失超能,同时恒压下的失超传播比恒流更慢。
The practical application of high-temperature superconducting materials in the device at both ends of the voltage remains constant, and the existing research is based on the constant current. Based on this, by establishing one-dimensional quench propagation model of Bi2223 / Ag high temperature superconducting tape under constant pressure, the quench propagation behavior of Bi2223 / Ag superconducting tape under constant pressure was studied by numerical simulation. The minimum quenching energy (MQE) and quench propagation velocity (NZPV) of Bi2223 / Ag strip under constant pressure are given by calculation. The quenching behavior of Bi2223 / Ag strip under constant current and constant pressure It is found that the minimum quench under constant pressure can be significantly less than the minimum quench energy under constant current and the quench at constant pressure is slower than the steady flow.