射频负离子源200kV高压平台磁缓冲器系统中磁芯的性能测试和分析  

Performance test and analysis of the magnetic core in a core snubber system for 200kV high voltage deck of radio frequency negative ion source

作　　者：于祺 李明[1] 赵淼 张余弦 张贤明[1] 雷光玖[1] YU Qi;LI Ming;ZHAO Miao;ZHANG Yu-xian;ZHANG Xian-ming;LEI Guang-jiu(Southwestern Institute of Physics,Chengdu 610041)

机构地区：[1]核工业西南物理研究院,成都610041

出　　处：《核聚变与等离子体物理》2023年第3期263-269,共7页Nuclear Fusion and Plasma Physics

基　　金：国家重点研发计划(2017YFE0300100)。

摘　　要：在射频负离子源200kV高压平台磁缓冲器系统设计中,首次通过旁路电阻的方式,解决了系统运行时次级直流偏置电路中电阻的过热问题。分析了磁缓冲器系统在高压电源启动阶段(工况1)和负离子源运行阶段电极间打火时(工况2)的主要工作频率。在工况1对应的工作频率下,测试了磁缓冲器核心部件铁基纳米晶软磁合金(FINEMET)磁芯的B-H曲线,得出加入直流偏置后的振幅磁导率与无直流偏置时相比,下降了60%(200Hz)~80%(100Hz)。在工况2对应的主要频率下,测试了磁芯的复数起始磁导率并进行了储能耗能分析。在25~525kHz频率范围内,测得了磁芯的磁谱以及品质因数随频率变化的曲线,得出随着频率的增加,磁芯单位耗能下的储能逐渐减小;当频率达到100kHz以上后,磁芯的能量存储与耗散状态趋于稳定。In the design of the core snubber system for the 200kV high voltage deck of radio frequency negative ion source,the overheating of the resistor in the secondary DC bias circuit during system operation is solved by the bypass resistor for the first time.The main working frequency of the core snubber system in the HVPS(high voltage power supply)start-up stage(case I)and the breakdown between the electrodes of negative ion source(case II)is analyzed.Under the working frequency corresponding to case I,the B-H curve and dynamic characteristics of the FINEMET magnetic core in the core snubber system are tested.The amplitude permeability decreases by 60%(at 200Hz)~80%(at 100Hz)after adding DC bias.Under the main frequency corresponding to case II,the complex initial permeability of the magnetic core is tested,and the energy storage and energy consumption are analyzed.In the frequency range of 25~525kHz,its magnetic spectrum and the curve of the quality factor with frequency are measured and obtained.As the frequency increases,the energy storage per unit energy consumption of the magnetic core gradually decreases;when the frequency reaches above 100kHz,the energy storage and dissipation state of the magnetic core tends to stabilize.

关 键 词：磁缓冲器 铁基纳米晶软磁合金 B-H曲线 磁谱 

分 类 号：TM921.02[电气工程—电力电子与电力传动]