Quench Protection Design of a 1.5 T Superconducting MRI Magnet

A 1.5 T superconducting MRI magnet has been developed in our laboratory. A passive quench protection system is employed to avoid the damage through the quench event. The coils are subdivided into several groups and a heater network is implemented accordingly. With the control volume method, the nume...

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Veröffentlicht in:	IEEE transactions on applied superconductivity 2012-06, Vol.22 (3), p.4703604-4703604
Hauptverfasser:	Li, Yi, Wang, Qiuliang, Chen, Shunzhong, Liu, Feng, Hu, Xinning, Yan, Luguang
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Coils Connection and protection apparatus Design engineering Electrical engineering. Electrical power engineering Electromagnets Exact sciences and technology Heaters Heating equipment Magnetic resonance imaging Mathematical models Miscellaneous MRI Protection systems quench protection Resistance heating Strips superconducting magnet Superconducting magnets Superconductivity Testing. Reliability. Quality control Various equipment and components Voltage Windings
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Beschreibung
Zusammenfassung:	A 1.5 T superconducting MRI magnet has been developed in our laboratory. A passive quench protection system is employed to avoid the damage through the quench event. The coils are subdivided into several groups and a heater network is implemented accordingly. With the control volume method, the numerical model of the quench time is introduced. Different design schemes of the heater strip are compared. The simulation results of currents and voltages are illustrated and the temperature rise of the coils and the heaters are discussed.
ISSN:	1051-8223 1558-2515
DOI:	10.1109/TASC.2011.2174595