Study on a Highly Stabilized Power Supply for Hybrid-Magnet Superconducting Outsert

WU Jinglin(吴景林); LONG Jiaojiao(龙佼佼); LIU Xiaoning(刘小宁)

doi:10.1088/1009-0630/16/9/15

Plasma Science and Technology > 2014 > 16(9): 890-896. > DOI: 10.1088/1009-0630/16/9/15

WU Jinglin(吴景林), LONG Jiaojiao(龙佼佼), LIU Xiaoning(刘小宁). Study on a Highly Stabilized Power Supply for Hybrid-Magnet Superconducting Outsert[J]. Plasma Science and Technology, 2014, 16(9): 890-896. DOI: 10.1088/1009-0630/16/9/15

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Study on a Highly Stabilized Power Supply for Hybrid-Magnet Superconducting Outsert

1 University of Science and Technology of China, Hefei 230026, China 2 High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, China

Funds: supported by National Natural Science Foundation of China (No. 50977086)

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Received Date: November 08, 2013

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Abstract

Abstract

The superconducting outsert of the 40 T hybrid-magnet in High Magnetic Field Laboratory (HMFL) of Chinese Academy of Sciences (CAS) requires a highly stabilized power supply. In this paper, two kinds of power supply design are briefly presented and both advantages and disadvantages are analyzed. In order to overcome the drawbacks of switching power supply, a series regulated active filter is adopted and a new design is proposed which ensures cooperative relationship between the feedback control loops of the switching converter and the series regulated active filter. Besides, unlike the traditional switching power supply, which can generate positive voltage only, this new design can also generate negative voltage which is needed in the quench protection for the superconducting magnet. In order to demonstrate the effectiveness of the methodology, a low-power prototype has been accomplished. The simulation and experiment results show that the power supply achieves high precision under the combined action of two feedback control loops. The peak-to-peak amplitude of the output ripple voltage of the prototype is 0.063%, while the peak-to-peak amplitude of the output ripple current is 120 ppm.
- superconducting magnet,
- switching power supply,
- series regulating,
- feedback control,
- quench protection

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References (9)

References

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