Analyses of barrier points of uniform transmission line for CSNS/RCS pulse power supply
-
摘要: 通过研究均匀传输线特征阻抗失配原理，发现传输电缆特征阻抗失配会导致负载终端励磁电流幅值发生畸变。对电源主电路关键参数进行分析，发现均匀传输线匹配阻抗失配会造成磁铁处励磁电流幅值变小，上升时间变短。建立均匀传输线障碍点等效模型，推导出脉冲电源传输线障碍点处反射系数，对串联电阻和并联电阻障碍点深入分析，发现传输线特征阻抗失配，会导致匹配负载处有功功率减小。最后通过高压电缆被击穿故障使其得以验证。Abstract: By studying the principle of characteristic impedance mismatch of uniform transmission line, it is found that the characteristic impedance mismatch of transmission cable will lead to the distortion of excitation current amplitude of load terminal. The key parameters of main circuit for power supply are analyzed, the amplitude and rise time of the excitation current at the magnet are decreased, when the matching impedance of the uniform transmission line is mismatched. By establishing the equivalent model of barrier point in uniform transmission line, the reflection coefficient at the barrier point of the uniform transmission line is derived. Based on the analysis of series resistance and parallel resistance at the barrier, it is found that the mismatch of transmission line characteristic impedance will lead to the decrease of active power at matching load. It is verified by the breakdown of high voltage cable.
-
图 2 均匀传输线障碍点等效模型
Figure 2. Equivalent model of the barrier point in the uniform transmission line
表 1 PFN调试实验
Table 1. The experiments of PFN
first inductance/nH second inductance/nH rise time/ns flatness/% 310 310 278 ±1.7 170 310 274 ±1.5 170 170 270 ±1.2 110 170 264 ±0.9 110 110 262 ±1.1 
下载: 导出CSV
表 2 传输线特征阻抗匹配实验
Table 2. The matching experiments of characteristic impedance in transmission line
transmission cable
impedance/Ωmatching
resistance /Ωmatching impedance of
transmission line/Ωcharacteristic impedance of
transmission line/Ω12.5 12.5 6.25 6.25 16.7 12.5 7.2 6.25 12.5 14 6.6 6.25 16.7 14 7.6 6.25
下载: 导出CSV
-
[1] 王玮. CSNS引出冲击磁铁脉冲电源系统设计与研制[D]. 北京: 中国科学院高能物理研究所, 2008: 1-10.Wang Wei. Research and development of extraction kicker pulse power supply system for CSNS[D]. Beijing: Institute of High Energy Physics, Chinese Academy of Sciences, 2008: 1-10 [2] 赵籍九, 尹兆升. 粒子加速器技术[M]. 北京: 高等教育出版社, 2006.Zhao Jijiu, Yin Zhaosheng. Particle accelerator technology[M]. Beijing: Higher Education Press, 2006 [3] 池云龙, 王玮. CSNS引出冲击磁铁脉冲电源设计[J]. 中国物理C, 2008, 32(S1):25-27. (Chi Yunlong, Wang Wei. Design of pulse power supply for CSNS extraction kicker magnet[J]. Chinese Physics C, 2008, 32(S1): 25-27 [4] 陈锦晖. BEPCII注入冲击磁铁电源系统设计与研制[D]. 北京: 中国科学院高能物理研究所, 2006: 3-15.Chen Jinhui. Research and development injection kicker power supply system for the BEPCII[D]. Beijing: Institute of High Energy Physics, Chinese Academy of Sciences, 2006: 3-15 [5] 王莹. 高功率脉冲电源[M]. 北京: 原子能出版社, 1991.Wang Ying. Power source with high power pulse[M]. Beijing: Atomic Energy Press, 1991 [6] Zhang W, Sandberg J, Hahn H, et al. SNS extract ion fast kicker pulsed power system[C]//Proc of 2004 European Particle Accelerator Conference. Switzerland, 2004: 1810-1812. [7] Tang J Y, Chen Y, Chi Y L, et al. Extraction system design f or the CSNS /RCS[C]//Proc of European Particle Accelerator Conference. 2006. [8] 顾继慧. 微波技术[M]. 北京: 科学出版社, 2014.Gu Jihui. Microwave technique[M]. Beijing: Science Press, 2014 [9] 东冲. 线型脉冲调制器理论基础与专用电路[M]. 北京: 国防工业出版社, 1978.Dong Chong. Theoretical basis and special circuit of linear pulse modulator[M]. Beijing: National Defense Industrial Press, 1978 [10] 刘伟莲. 基于电阻分压器的纳秒高压脉冲测量系统研究[D]. 南京: 南京农业大学, 2008: 3-15.Liu Weilian. The research of nanosecond high pulse measurement system based on resistance voltage divider[D]. Nanjing: Nanjing Agricultural University, 2008: 3-15 -
点击查看大图
图(3) / 表(2)
计量
- 文章访问数: 913
- HTML全文浏览量: 209
- PDF下载量: 17
- 被引次数: 0
