| 基于方波LTD的3 MV闪光照相驱动器设计 |
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| 引用本文： | 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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| 作者姓名： | 陈林 周良骥 蒋吉昊 刘瑜 王勐 吴伟 |
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| 作者单位： | 1.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 621 999 |
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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 (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。
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| 关 键 词： | 直线变压器驱动源 闪光照相 方波 二极管 |
| 收稿时间： | 2017-05-31 |
Design of 3 MV flash radiographic driver based on square pulse LTD |
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| Affiliation: | 1.Key Laboratory of Pulsed Power,Institute of Fluid Physics,CAEP,P.O.Box 919-108,Mianyang 621999,China |
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| 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 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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