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为了解直线型变压器驱动源(LTD)的工作特点,掌握LTD对百ns方波脉冲的响应情况,设计了一台可输出电压峰值>20 kV,脉冲半高宽约150 ns的单级长脉冲LTD模块。对整个装置的各个单元的设计进行了详细介绍,通过理论分析进行优化,给出了合理的参数,该LTD模块采用两路并联馈电。每路馈电脉冲由30 kV高压电缆绕制而成的脉冲形成线产生,且为减小回路杂散电感的影响,设计制作了一个低电感、较小抖动的三电极触发开关。初步的实验结果表明,初、次级间电压吻合的很好,验证了理论分析及装置设计。最后针对以上工作中的不足提出了今后的工作重点,包括对磁芯非线性磁导率和损耗的研究,提出更加符合实际的变压器模型,对LTD以及馈电装置的布局研究等,为将来优化设计并多级串联,实现更高电压输出奠定了基础。
In order to understand the operating characteristics of the Linear Transformer Driver (LTD) and to master the response of LTD to the hundred ns square wave pulses, a single-stage long pulse with a peak voltage> 20 kV and a pulse width of about 150 ns LTD module. The design of each unit of the whole device is introduced in detail. The optimization is made through theoretical analysis, and the reasonable parameters are given. The LTD module adopts two parallel feeds. Each feeding pulse is generated by a pulse forming wire wound by a 30 kV high voltage cable. In order to reduce the influence of the loop stray inductance, a three-electrode trigger switch with low inductance and small jitter is designed and manufactured. The preliminary experimental results show that the voltage between the primary and the secondary is in good agreement, which verifies the theoretical analysis and device design. In the end, the author puts forward the key work in the future, including the research on the nonlinear permeability and loss of the magnetic core, the more realistic transformer model, the research on the layout of the LTD and the feeder, Design and multi-level series, to achieve a higher voltage output laid the foundation.