New Transformer for Powering Superconducting Magnets
A new method to increase the efficiency of powering a superconducting magnet is presented. The powering system links a superconducting magnet and the mains. It contains both room and low temperature electrical components.
The use of a conventional power supply with a pair of high current leads or application of rectifier schemes based on superconductors or cold semiconductors shows certain limits. We propose to introduce an iron-core superconducting transformer between the conventional power supply and the magnet. This step leads to an optimized operation of the powering system and it is applicable with both low and high Tc superconductors.
In order to demonstrate the approach, a model of the proposed powering unit has been developed. The performance of the unit is demonstrated while ramping a current of a small SC magnet operating at 4.2 K. The characteristic in- and output currents are ± 20 A and ± 1 kA respectively.
KeywordsIron Core Superconducting Magnet Magnet Current Secondary Coil Primary Coil
Unable to display preview. Download preview PDF.
- 1.J. McCarthy and C. C. Smith, “Power supply design for superconducting magnet applications”, Superconductor Industry, pp. 22 (Spring 1992).Google Scholar
- 2.O. A. Shevchenko, H. J. G. Krooshoop, and H. H. J. ten Kate, “Switching properties of high quality superconductors”, the paper to be published in the Proceedings of the EUCAS 97 (held in June-July, 1997).Google Scholar
- 3.O. A. Shevchenko, M. A. Fedorovsky, and H. H. J. ten Kate, “Cold semi-conducting converter, a compatibility device for a superconducting magnet”, Adv. in Cryogenic Engineering, Vol. 41, (1996).Google Scholar
- 4.H. J. Knoopers, S. Wessel, H. J. G. Krooshoop, O. A. Shevchenko, A. Godeke, and H. H. J. ten Kate, “Fast ramp 50 kA superconducting transformer for testing full-size ITER cable joints”, Proc. of the 16-th Int. CEC/ICMC Kitakyushu, Japan 20–24 May 1996, Elsevier Science, part 2, pp.803–806 (1997).Google Scholar
- 6.G. B. J. Mulder, H. J. G. Krooshoop, A. Nijhuis, H. H. J. ten Kate, and L. J. M. van de Klundert, “A convenient method for testing high-current superconducting cables” Cryogenics.3, Vol. 35, pp. 763–770 (1990).Google Scholar
- 7.“Concise encyclopedia of magnetic & superconducting matcrials” / ed., J. E. Evetts Pergamon Press, Ltd. (1992)Google Scholar