AC Losses Analysis and Experiments of Superconducting Electromagnetic Iron Separator

A 3 T central field Superconducting Electromagnetic Iron Separator (SEIS), which was designed to separate dangerous ferromagnetic materials, such as detonators, from coal, has been successfully developed at Institute of High Energy Physics (IHEP). The SEIS magnet is mainly composed of a NbTi solenoi...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2012-06, Vol.22 (3), p.9002304-9002304
Main Authors: Ma, Wenbin, Hou, Zhilong, Liu, Zhiyong, Ning, Feipeng, Zhang, Guoqing, Zhu, Zian
Format: Article
Language:English
Subjects:
AC loss
Alternating current
Applied sciences
Charging
Coils
Cryostats
Electric connection. Cables. Wiring
Electrical engineering. Electrical power engineering
Electromagnets
Electronic equipment and fabrication. Passive components, printed wiring boards, connectics
Electronics
Exact sciences and technology
Finite element analysis
Heating
Helium
Hysteresis
Iron
Iron and steel industry
Magnetic flux
Magnetic hysteresis
Magnetic separation
Power electronics, power supplies
pressure rise
Separators
Studies
Superconducting magnets
Superconductivity
temperature margin
Various equipment and components
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Summary:A 3 T central field Superconducting Electromagnetic Iron Separator (SEIS), which was designed to separate dangerous ferromagnetic materials, such as detonators, from coal, has been successfully developed at Institute of High Energy Physics (IHEP). The SEIS magnet is mainly composed of a NbTi solenoid coil, a pair of binary current leads (CL) and a re-condensation cryostat with two GM cryocoolers (31 W/40 K, 1 W/4.2 K). Powered with a 250 A/50 V power supply, the magnet has 15 minutes of charging time and 20 minutes of discharging time. The AC losses, mainly consist of hysteretic loss and coupling loss, was calculated with a two-dimensional ANSYS FEA model. The effect of AC losses on the temperature distribution within the cold mass and its induced cryostat pressure rise were analysed during charging process. With regard to the cryostat pressure rise, the analysis results were quite close to the experimental results.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2011.2178110