The higherature superconducting magnets with high magnetic field can store a relatively large amount of energy because of their large inductance and operating current. The magnetic energy stored in the magnet is converted into heat energy when a quench occurs, and the heat generated by the quench resistance and magnet current is sufficient to damage the magnet. Therefore, the large amount of energy stored in a superconducting magnet must be removed quickly to protect the magnet. In this paper, a new quench protection method using a capacitor and dual-switches is proposed and compared to a conventional energy extraction system that uses only a dump resistor. The simulation and test results show that this new protection system is a feasible method for reducing the temperature increase by rapidly reducing the magnet current when a quench occurs.
Bibliographical noteFunding Information:
Manuscript received October 30, 2018; accepted March 30, 2019. Date of publication April 15, 2019; date of current version May 14, 2019. This work was supported in part by “Human Resources Program in Energy Technology” of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), granted financial resource from the Ministry of Trade, Industry, and Energy, Republic of Korea, and in part by the National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (20184030202270 and 2017R1A2B3012208). (Corresponding author: Tae Kuk Ko.) Y. Choi and H. Jeon are with the School of Electrical and Electronic Engineering, Yonsei University, Seoul 30722, South Korea (e-mail: cyj7287@ yonsei.ac.kr).
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering