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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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2012-06, Vol.22 (3), p.4703604-4703604
Main Authors: Li, Yi, Wang, Qiuliang, Chen, Shunzhong, Liu, Feng, Hu, Xinning, Yan, Luguang
Format: Article
Language:English
Subjects:
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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Summary: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