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