电工技术学报  2017, Vol. 32 Issue (20): 62-70    DOI: 10.19595/j.cnki.1000-6753.tces.170144
高电压与放电等离体子专题(特约主编:邵涛 研究员) |
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
魏浩1,2, 孙凤举1, 邱爱慈1,2, 呼义翔1
1. 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) 西安 710024;
2. 电力设备电气绝缘国家重点实验室(西安交通大学) 西安 710049
Spatially Asymmetric Distribution and Related Influence Factors of Injected Currents in Magnetically-Insulated Induction Voltage Adders
Wei Hao1,2, Sun Fengju2, Qiu Aici1,2, Hu Yixiang2
1. State Key Laboratory of Intense Pulsed Radiation Simulation and Effect Northwest Institute of Nuclear Technology Xi’an 710024 China;
2. State Key Laboratory of Electrical Insulation and Power Equipment Xi’an Jiaotong University Xi’an 710049 China
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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。
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关键词 磁绝缘感应电压叠加器感应腔注入电流空间非均匀分布不均匀系数    
Abstract:The special injection manner of magnetically-insulated induction voltage adders (MIVA) leads to the spatially asymmetric distributions of injected currents. It might affect the cavity performances and the characteristics of magnetic insulation in the secondary sides of MIVA, such as the electron sheath, flow impedance, and the current variations. In this paper, a full-size electromagnetic model of an induction cavity was developed, to acquire the spatial distribution of injected currents in the primary sides of cavities and the profiles of magnetic fields in the secondary sides. The dynamic process of the asymmetric coefficient, δ(t), was obtained. Some factors affecting the δ(t) were analyzed in detail, such as the pulse width of injected currents, the insulating medium in the primary sides of cavities, the number of injected pulses and their driver jitter. It is found that, the dynamic process of asymmetric coefficient, δ(t), consists of three phases, i.e., the fast drop process, steady state, and slow decrease process. The pulse width of injected currents affects the duration of the steady state and the subsequent third process. The insulating medium in the primary sides of cavities affects the spatial distributions of injected currents by changing the transmission speed of electrical pulses in cavities. The number of injected pulses has crucial influence on the current distributions. As the two pulses driving the same cavity could not arrive simultaneously, the current distributions would change. Moreover, the current injection experiments of a single-stage cavity in part confirm the simulation results.
Key wordsMagnetically-insulated induction voltage adders    induction cavity    injected current    spatially asymmetric distributions    asymmetric coefficient   
收稿日期: 2017-02-14      出版日期: 2017-10-30
PACS: TM836  
  O441  
基金资助:国家自然科学基金资助项目(11505138、51577156)
通讯作者: 魏 浩 男,1986年生,博士,助理研究员,研究方向为高功率脉冲驱动源技术等。E-mail: weihaoyy@sina.com   
作者简介: 孙凤举 男,1967年生,研究员,研究方向为直线变压器驱动源、感应电压叠加器等强流脉冲加速器驱动源技术。E-mail: sun-feng-ju@126.com
引用本文:   
魏浩, 孙凤举, 邱爱慈, 呼义翔. 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[J]. 电工技术学报, 2017, 32(20): 62-70. Wei Hao, Sun Fengju, Qiu Aici, Hu Yixiang. Spatially Asymmetric Distribution and Related Influence Factors of Injected Currents in Magnetically-Insulated Induction Voltage Adders. Transactions of China Electrotechnical Society, 2017, 32(20): 62-70.
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https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.170144          https://dgjsxb.ces-transaction.com/CN/Y2017/V32/I20/62