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傳輸電流法測量Bi2223／Ag多芯高溫超導帶材的交流損耗
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TM262

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國家超導研究開發(fā)項目(863-CD010101)


AC Losses of Bi2223/Ag Superconducting Tape Measured by Transport Current Method
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    摘要:

    利用傳輸電流法設計了一套高溫超導體自場損耗測量系統(tǒng)，樣品上負載的傳輸電流幅值可以達到100A，頻率在0.5Hz到1000Hz之間任意可調(diào)。測量了Bi2223/Ag高溫超導帶材在77K不同頻率條件下的自場交流損耗，并將實驗結(jié)果與Norris方程的預期值進行了比較，發(fā)現(xiàn)當傳統(tǒng)電流的頻率較低時，Bi2223/Ag的交流損耗主要是磁滯損耗；而當頻率較高時耦合損耗不能忽略。

    Abstract:

    An experimental set-up was designed for measuring the self-field losses of Bi2223/Ag HTS tapes using a transport current method. The frequency of transport current can be freely changed from 0.5 Hz to 1000Hz. Its amplitude can be as much as 100A. The self-field losses of Bi2223/Ag tapes,which are made by the traditional PIT method with the critical current of 15.5A and SC/Ag ratio of about 0.25 were measured at 77K with differnt frequency transport currents. The results are compared with those predicted by the Norris equations based on the critical state model. When the frequency of AC current is low the AC losses of Bi2223/Ag multifilamentry tapes are domestically hysterestic; As soon as the frequencies are more than 200 Hz, the eddy current losses can not be neglected.

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胡立發(fā) 周廉 等.傳輸電流法測量Bi2223／Ag多芯高溫超導帶材的交流損耗[J].稀有金屬材料與工程,2001,(3):169~172.[Hu Lifa, Zhou Lian, Wang Jinxing, Zhang Pingxiang, Li Chengshan, Yang Shizhong, He Yanfa, Li Jinghui. AC Losses of Bi2223/Ag Superconducting Tape Measured by Transport Current Method[J]. Rare Metal Materials and Engineering,2001,(3):169~172.]
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  • 最后修改日期:2001-03-01
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