磁绝缘感应电压叠加器注入电流空间非均匀分布及影响因素分析

发布时间：2018-05-10 19:37

本文选题：磁绝缘感应电压叠加器 + 感应腔　；参考：《电工技术学报》2017年20期

【摘要】：磁绝缘感应电压叠加器(MIVA)脉冲馈入方式导致感应腔注入电流空间非均匀分布,这对感应腔性能(如等效电感、电磁场分布、输出参数等)和MIVA次级磁绝缘特性(如电子鞘层、流阻抗、电流损失等)产生影响。建立MIVA感应腔全电磁模型,并得到典型结构下感应腔初级注入电流空间分布和次级磁场强度的分布特性。给出电流不均匀系数δ(t)的动态变化过程,仿真分析注入电流脉宽、感应腔初级绝缘介质、脉冲馈入路数及时间抖动等因素对δ(t)的影响规律。结果表明,δ(t)动态过程分为快速下降、稳定和缓慢下降三个阶段,注入电流脉宽影响稳定阶段持续时间和缓慢下降阶段;初级绝缘介质影响感应腔内电磁脉冲传播速率,进而对电流空间分布产生影响;注入脉冲路数对注入电流空间分布有决定性影响;双路脉冲馈入感应腔注入时间不同步时,不均匀系数发生改变。开展了单级感应腔注入电流空间分布实验,验证了电磁计算的正确性。
[Abstract]:The input mode of magnetically insulated inductive voltage superposition (Mia) pulse leads to the non-uniform distribution of the injection current space of the inductor cavity, which affects the performance of the induction cavity (such as equivalent inductance, electromagnetic field distribution, output parameters, etc.) and the secondary magnetic insulation characteristics of MIVA (such as electron sheath, etc.) Current impedance, current loss, etc. The full electromagnetic model of MIVA induction cavity is established, and the spatial distribution of primary injection current and the distribution of secondary magnetic field intensity are obtained under typical structure. The dynamic variation process of current inhomogeneity coefficient 未 t) is given. The influence of injection current pulse width, induction cavity primary insulator, pulse feed number and time jitter on 未 t are analyzed by simulation. The results show that the 未 T) dynamic process can be divided into three stages: fast decreasing, steady and slow decreasing, the duration of the stable phase is influenced by the pulse width of the injection current, and the propagation rate of the electromagnetic pulse in the induction cavity is affected by the primary insulating medium. The number of injection pulses has a decisive effect on the spatial distribution of the injection current, and the uneven coefficient changes when the injection time of the two-channel pulse fed into the induction cavity is not synchronized. Experiments on the spatial distribution of the injection current in a single stage induction cavity are carried out to verify the correctness of the electromagnetic calculation.
【作者单位】：强脉冲辐射环境模拟与效应国家重点实验室(西北核技术研究所);电力设备电气绝缘国家重点实验室(西安交通大学);
【基金】：国家自然科学基金资助项目(11505138、51577156)
【分类号】：TM83

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