Analysis and Application of the Series Core Snubber  

作　　者：谢飞 李格 程德胜 陈强健 

机构地区：[1]Department of Electronic and Information Engineering, Shunde Polytechnic [2]Institute of Plasma Physics, Chinese Academy of Sciences

出　　处：《Plasma Science and Technology》2013年第5期469-475,共7页等离子体科学和技术（英文版）

基　　金：supported by National Magnetic Confinement Fusion Science Program of China (Nos.2010GB108003, 2011GB113005-1);in part by the National Magnetic Confinement Fusion Science Program of China (No.2010GB108003);the State Basic Research Development Program of China (973 Program 2011GB113005-1);the Large Scientific Project of EAST Auxiliary Heating Upgrade

摘　　要：The transformer core snubber （CS）, as one of the most important components in the EAST （experimental advanced superconducting tokamak） NBI （neutral beam injector） system, is designed to limit grid damage and protect the ion source during periods of electrical breakdowns. A transformer core snubber is analyzed in detail in this paper. Several kinds of soft magnetic cores are presented and compared. With analysis and experiment on the basic characteristics of the cores, the most suitable materials are suggested. The circuit simulation code is established which could simulate faulty conditions with concentrated and distributed CS concepts. Based on the above work, an ion source CS is developed with series type of distributed topology. The CS has been subjected to experimental validation at 80 kV with a peak short-current of approximately 400 A in a real NBI system, which proves the accuracy of the adopted assumptions and the analysis method.The transformer core snubber （CS）, as one of the most important components in the EAST （experimental advanced superconducting tokamak） NBI （neutral beam injector） system, is designed to limit grid damage and protect the ion source during periods of electrical breakdowns. A transformer core snubber is analyzed in detail in this paper. Several kinds of soft magnetic cores are presented and compared. With analysis and experiment on the basic characteristics of the cores, the most suitable materials are suggested. The circuit simulation code is established which could simulate faulty conditions with concentrated and distributed CS concepts. Based on the above work, an ion source CS is developed with series type of distributed topology. The CS has been subjected to experimental validation at 80 kV with a peak short-current of approximately 400 A in a real NBI system, which proves the accuracy of the adopted assumptions and the analysis method.

关 键 词：NBI core snubber nanocrystalline soft magnetic materials Deltamax dis-charge experiment arc current 

分 类 号：TL631.24[核科学技术—核技术及应用]