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Design and performance of compensator for decremental persistent current in HTS magnets using linear type magnetic flux pump

Design and performance of compensator for decremental persistent current in HTS magnets using linear type magnetic flux pump,10.1016/j.cryogenics.2004

Design and performance of compensator for decremental persistent current in HTS magnets using linear type magnetic flux pump   (Citations: 12)
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This paper has described the characteristics of a stationary linear type magnetic flux pump newly developed this time. The linear type flux pump aims to compensate a little decremental persistent current of the HTS magnet in NMR and MRI systems. The flux pump mainly consists of DC bias coil, 3-phase AC coil and Nb foil. Analytical results by the FEM are proved to nearly agree with experimental ones. In the experiment, it has been investigated that the flux pump can effectively charge the current in the load coil of 1.3 mH for various frequencies in 150 s under two following conditions: (1) DC bias of 10 A and AC of 4 Arms, (2) DC bias of 10 A and AC of 5 Arms. The maximum magnitudes of initial increasing rate of pumping current and load magnet voltage are: (1) 0.2 A/s and 25 mV and (2) 0.22 A/s and 34 mV, respectively.
Journal: Cryogenics , vol. 44, no. 11, pp. 839-844, 2004
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