Preliminary design of high power magnet converter for CRAFT

• 作 者: Zhongma WANG Peng FU Liansheng HUANG Zhiquan SONG Xiuqing ZHANG Tianbai DENG Tao CHEN Ronglin HUANG Zhenshang WANG Xiaojiao CHEN Shiying HE Zejing WANG Guanghong WANG
• 机 构: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China“,
• 出 处: 等离子体科学和技术（英文版）
• 发表日期: 2020年4期
• 关键词: CRAFT converter thyristor fast fuse snubber

In order to test the superconducting magnet performance for the Comprehensive Research Facility for Fusion Technology (CRAFT) project of China,a power supply converter needs to be designed.In this paper,short circuits upstream and downstream of the direct current (DC) reactor are analyzed,and the thyristor style and the parallel number are determined by the limit analysis of junction temperature and fault current I2t.On this basis,the over current and voltage verification of fast fuse are finished to protect the thyristor at fault cases by considering the short circuit of the bridge ann.Then,the resistor and capacitor parameters of thyristor snubber are committed to decreasing the reverse over voltage.These analysis results will be used as the preliminary design of high power magnet converter for CRAFT.