Effect of superconducting magnet structure on quench characteristics

ABSTRACT

In the design process of MRI magnets, the study of quench phenomenon is of great significance to the operation of superconducting magnets. In this paper, the quench characteristics of 1 T symmetric magnet and asymmetric magnet are simulated and analysed by using three-dimensional finite element software OPERA. The modelling process and algorithm of simulation are introduced in detail. The critical current density of NbTi superconducting material is set by looking up table variables preset by software. Through simulation and analysis, the changing principles of the current and resistance of the superconductor coil, which are important physical quantities of the two kinds of magnet structures in quenching are obtained. Three-dimensional simulation graphics are more conducive to observing the propagation speed of quench in different directions. It is concluded that although the DSV (diameter sphere volume) of asymmetric magnet is larger than that of symmetric magnet, the damage of asymmetric magnet is more serious than that of symmetric magnet during the quench.

KEYWORDS:

• Quench
• magnetic resonance imaging (MRI)
• superconducting magnets
• symmetric configuration
• asymmetric configuration
• comparison
• simulation

Biography

Zhang Ran (1983-),male, lecture in the school of electrical engineering of BinZhou University. He received the PhD degree from Shandong University, China. Now he is the vice dean of the school of electrical engineering on secondment. His mainly research is focused on the control and simulation of permanent magnet motors in new energy vehicles. He has published more than 20 papers on the research of permanent magnet motors.

Acknowledgments

This study was supported by The Doctoral Startup Research Program in 2017 of the BinZhou University “Design of Electrical System for Oilfield Electric Operation Equipment with Electric Energy Storage” (2017Y02) and The Major Research Project in 2017 of the BinZhou University “Research on Key Technologies of Hybrid Power Supply of Power Battery and Power Grid” (2017ZDL04).

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by the The Major Research Project in 2017 of the Binzhou University [2017ZDL04]; The Doctoral Startup Research Program in 2017 of the Binzhou University [2017Y02] Key projects of Natural Science Foundation of Shandong Province in 2020 [ZR2020KC008]; Research and innovation team of Binzhou University:Research and innovation team of aviation intelligent control and special motor; Binzhou Key Laboratory: Binzhou Key Laboratory of electric drive.

Notes on contributors

Lianxue Gao

Gao Lianxue (1978-), male, associate professor in the school of electrical engineering of Binzhou University. He graduated from Shandong university, China. Now he is vice dean of the school of electrical engineering. His mainly research is focused on the motor intelligent controlling and energy saving. He has published more than 10 papers on the research of brushless DC motors.

Ran Zhang

Zhang Ran(1983-), male, doctor of Electrical Engineering, Lecturer. Graduated from the Shandong University in 2011. Worked in Binzhou university. His research interests include control and simulation of electrical machine, more than20 papers published and 1 book published

Mingqing Xu

Xu Mingqing (1962-), male, professor in the school of electrical engineering of Binzhou University. Now he is dean of the school of electrical engineering. His mainly research is focused on the motor intelligent controlling and energy saving.