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基于方波LTD的3 MV闪光照相驱动器设计

Design of 3 MV flash radiographic driver based on square pulse LTD

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摘要

直线变压器驱动源(LTD)是近年来发展起来的一种新型电路拓扑技术,具有结构紧凑、参数调整灵活、能量效率高等优点。根据闪光照相的需要,开展了基于方波LTD技术的闪光照相驱动器设计,驱动器输出电压约3 MV,负载阻抗约40 Ω(杆箍缩二极管特征阻抗)。主机共由30个方波LTD模块串联而成,单个LTD模块采用16个放电支路(包含12个为基波支路和4个为谐波支路)并联,其中每个放电支路由2台脉冲电容器和一只多间隙气体开关串联组成。LTD次级采用变压器油绝缘,整机长度接近8 m。电路计算表明,驱动器输出电压大于3 MV,上升沿约16.8 ns,脉冲宽度约98 ns。

Abstract

Linear transformer driver (LTD) is a new electrical circuit topology developed in recent years which has a number of significant advantages such as compactness, flexible output parameters and high energy transfer efficiency. According to the requirement for flash X-ray radiography, the pulsed driver which can deliver 3 MV on a 40 Ω rod pinch diode (RPD) has been designed. The machine is composed of 30 square pulse LTD stages in series with a total length of 8 meters. Each LTD stage contains 12 fundamental bricks each consisting of two 10 nF capacitors and a multi-gap switch connected in series and 4 harmonic bricks each consisting of two 1 nF capacitors and a multi-gap switch connected in series. The transformer oil is used as voltage adder insulator. According to the equivalent circuit simulation, the generator can produce more than 3 MV fast pulse in 16.8 ns with 98 ns FWHM.

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中图分类号:TM836

DOI:10.11884/hplpb201729.170189

所属栏目:脉冲功率技术

基金项目:国家自然科学基金项目(51177155)

收稿日期:2017-05-31

修改稿日期:2017-08-10

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作者单位    点击查看

陈 林:中国工程物理研究院 流体物理研究所, 脉冲功率科学与技术重点实验室, 四川 绵阳 621999
周良骥:中国工程物理研究院 流体物理研究所, 脉冲功率科学与技术重点实验室, 四川 绵阳 621999
蒋吉昊:中国工程物理研究院 流体物理研究所, 脉冲功率科学与技术重点实验室, 四川 绵阳 621999
刘 瑜:中国工程物理研究院 流体物理研究所, 脉冲功率科学与技术重点实验室, 四川 绵阳 621999
王 勐:中国工程物理研究院 流体物理研究所, 脉冲功率科学与技术重点实验室, 四川 绵阳 621999
吴 伟:中国工程物理研究院 流体物理研究所, 脉冲功率科学与技术重点实验室, 四川 绵阳 621999

联系人作者:陈林(chenlin_mail@21cn.com)

备注:陈 林(1970-),男,博士,研究员,从事脉冲功率技术及其应用研究。

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引用该论文

Chen Lin,Zhou Liangji,Jiang Jihao,Liu Yu,Wang Meng,Wu Wei. Design of 3 MV flash radiographic driver based on square pulse LTD[J]. High Power Laser and Particle Beams, 2017, 29(11): 115001

陈 林,周良骥,蒋吉昊,刘 瑜,王 勐,吴 伟. 基于方波LTD的3 MV闪光照相驱动器设计[J]. 强激光与粒子束, 2017, 29(11): 115001

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