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고온초전도 BSCCO 팬케이크 권선에 인가되는 자장과 임계전류의 산정
具明煥(Myunghwan Koo),姜明勳(Myunghun Kang),李喜俊(Heejoon Lee),車貴守(Gueesoo Cha) 대한전기학회 2008 전기학회논문지 Vol.57 No.11
Critical current of the superconducting machines is limited by the magnetic field. When the magnetic field is not uniform, it is difficult to estimate the magnetic field and the critical current. This paper proposed a method for the estimation of tile magnetic field and the critical current of the HTS pancake windings which can be used to generate the high field magnet. A parameter which was needed to calculate the critical current of a BSCCO magnet with 10 pancake windings was obtained by tile experiment. Test which was carried out by using single pancake winding and magnet consisting of 10 pancake windings shows the proposed method can be an effective method for the estimation of the critical current of pancake windings.
전계를 이용한 팬케이크 권선으로 제작되는 마그넷의 임계전류 산정
강명훈(Myunghun Kang),구명환(Myunghwan Koo),이희준(Heejoon Lee),차귀수(Gueesoo Cha) 대한전기학회 2009 전기학회논문지 Vol.58 No.3
The method to determine the operating current of HTS magnets needs to be different from that of LTS magnets. This paper presented estimation of the critical current of pancake windings. The pancake windings can be excited by a single power source or by multiple power sources. Critical currents were determined by using field dependent E-J relation. For the better estimation of the critical current, a new method to define the magnetic field of the HTS wire has been proposed. Calculated critical currents of pancake windings were compared with measured ones of the HTS BSCCO magnet consisting of 10 pancake windings. According to the test results, the estimated critical currents of pancake windings agreed well with that of measured ones. Effects of the single and multiple power source excitation on the critical currents have been also examined.