欠匹配型磁绝缘感应电压叠加器次级阻抗优化方法

发布时间：2018-03-30 06:12

本文选题：磁绝缘感应电压叠加器　切入点：次级阻抗　出处：《物理学报》2017年20期

【摘要】：磁绝缘感应电压叠加器(MIVA)次级阻抗对脉冲功率驱动源和负载之间的功率耦合具有重要影响.基于稳态磁绝缘Creedon层流理论和鞘层电子流再俘获(re-trapping)理论,建立了负载欠匹配型MIVA电路分析方法,数值分析获得了MIVA输出参数(输出电压、阴/阳极电流和电功率)随负载欠匹配程度的变化规律.考虑阴极传导电流作为闪光X射线照相二极管的有效电流,建立了以MIVA末端X射线剂量率最大为目标的次级阻抗优化方法.获得了欠匹配型MIVA次级优化阻抗Z_(op)~*的变化规律:随着X射线剂量率对电压依赖程度提高,欠匹配型MIVA次级优化阻抗Z_(op)~*呈指数降低;负载阻抗越大,Z_(op)~*越大.
[Abstract]:The secondary impedance of the magnetically insulated inductive voltage superposition (MIVA) has an important effect on the power coupling between the pulse power drive source and the load.Based on the theory of steady-state magnetically insulated Creedon laminar flow and sheath electron flow retrapping theory, a load under-matched MIVA circuit analysis method is established. The output parameters (output voltage) of MIVA are obtained by numerical analysis.The variation of negative / anode current and power with the undermatching of load.Considering cathode conduction current as the effective current of flash X-ray diode, a secondary impedance optimization method aiming at the maximum dose rate of X-ray at the end of MIVA is established.The variation rule of under-matched MIVA secondary optimal impedance Zaphe is obtained: with the increase of the dependence of X-ray dose rate on voltage, the under-matched MIVA secondary optimal impedance Zapi decreases exponentially, and the larger the load impedance is, the greater the load impedance is.
【作者单位】：西安交通大学电力设备电气绝缘国家重点实验室;西北核技术研究所强脉冲辐射环境模拟与效应国家重点实验室;
【基金】：国家自然科学基金(批准号:11505138,51577156)资助的课题~~
【分类号】：TN782;TN811

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