大功率脉冲驱动源电磁兼容性分析及优化设计

发布时间：2018-05-22 10:15

本文选题：脉冲驱动源 + 电磁兼容性　；参考：《吉林大学》2015年硕士论文

【摘要】：本文的研究工作是基于一款可以产生纳秒级脉冲的大功率脉冲驱动源展开的。大功率脉冲驱动源由于其广泛的应用领域近年来被全世界各大公司及研发机构所关注。相比国外中高端产品的更新换代，国内该领域发展相对滞后，没有成型的中高端产品面世[1]。究其原因，不仅仅是因为理论支撑和成型的设计方案的缺乏，更重要的是设计者在追求指标情况下，没有过多地研究设备的电磁兼容性，导致现有电路波形失真度较高，实用价值较低。本文首先找出原有电路的缺陷并进行相应调整，随后对原有的脉冲驱动源核心电路进行了电磁兼容性的理论分析及电路优化设计。上述过程包括：电路各单元的电磁兼容性设计、高速开关驱动电路改进以及电路结构的优化。并进行了相应的仿真研究，得到的仿真结果对下一步实践有重要的指导意义。在优化原理图之后，本文进行了大功率脉冲驱动源元器件更新和高频印刷电路板(PCB)优化设计。实验过程中选择了相互之间匹配度更高的核心元器件，并按照高频印刷电路板设计原则以及电磁兼容软件仿真结果重新设计了印刷电路板。为了装配样机，本文还在电路中设计了超短脉冲采样单元，并引入直流升压模块。电路调试成功后，根据电磁屏蔽理论设计大功率脉冲驱动源样机，，这一过程包括整机装配原理图的绘制和样机的装配调试工作。本文的独特性工作在于，合理分析影响大功率脉冲驱动源电磁兼容性的各种因素，通过电路优化设计、印刷电路板优化设计、核心元器件选择、设备屏蔽设计以及样机电气连接设计等方法，全面优化了大功率脉冲驱动源的整体性能。本文将高频电路分析、桥式驱动电路、电磁场理论以及电磁兼容解决方案巧妙地引入到大功率脉冲驱动源的设计中，并进行了大量实验调试。优化后的大功率脉冲驱动源很好地抑制了尖峰、过冲及脉冲底部振荡等电磁干扰现象，脉冲波形的质量有了很大的飞跃，而且输出指标的极限参数相比以往有了一定的提高，真正意义上达到了国际中高端产品的指标，具有较高的实用价值。在此基础上，本文总结了实验操作过程中的经验，对大功率超短脉冲测量方法进行了总结，为该领域的后续工作打下了基础。
[Abstract]:The work of this paper is based on a high power pulse driver which can generate nanosecond pulse. The high power pulse drive source has been paid attention by many companies and R & D organizations all over the world in recent years because of its wide range of applications. Compared with the update of the foreign mid-high-end products, the domestic development of this field is relatively lagging behind, there is no formation of mid-high-end products [1]. The reason is not only the lack of theoretical support and molding design, but also the fact that the designer does not study the electromagnetic compatibility of the equipment too much, which leads to the high distortion of the current circuit waveform. The practical value is low. In this paper, the defects of the original circuit are first found and adjusted accordingly, then the theoretical analysis of EMC and the circuit optimization design of the original core circuit of the pulse drive source are carried out. The above processes include the design of EMC for each unit of the circuit, the improvement of high-speed switch drive circuit and the optimization of circuit structure. The simulation results are of great significance to the future practice. After optimizing the schematic diagram, this paper carries on the high power pulse drive source component renewal and the high frequency printed circuit board (PCB) optimization design. In the process of experiment, the core components with higher matching degree are selected, and the printed circuit board is redesigned according to the design principle of high frequency printed circuit board and the simulation result of electromagnetic compatibility software. In order to assemble the prototype, the ultrashort pulse sampling unit is designed and the DC boost module is introduced. After the circuit is debugged successfully, the high power pulse driving source prototype is designed according to the electromagnetic shielding theory. This process includes the drawing of the whole machine assembly principle diagram and the assembly debugging of the prototype. The unique work of this paper lies in the reasonable analysis of various factors that affect the electromagnetic compatibility of the high-power pulse drive source, through the circuit optimization design, the printed circuit board optimization design, the selection of core components, The whole performance of the high power pulse drive source is optimized by means of shielding design and electrical connection design of the prototype. In this paper, high-frequency circuit analysis, bridge drive circuit, electromagnetic field theory and electromagnetic compatibility solution are skillfully introduced into the design of high-power pulse drive source, and a large number of experiments are carried out. The optimized high power pulse drive source can restrain the electromagnetic interference phenomena such as spike, overshoot and pulse bottom oscillation, and the quality of pulse waveform has been greatly improved, and the limit parameters of the output index have been improved compared with the previous ones. It has reached the target of international high-end products in real sense, and has higher practical value. On this basis, this paper summarizes the experience in the operation of the experiment, summarizes the measurement method of high power ultrashort pulse, and lays a foundation for the follow-up work in this field.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN03

【参考文献】