本文選題：脈沖驅(qū)動源 + 電磁兼容性　； 參考：《吉林大學(xué)》2015年碩士論文

【摘要】：本文的研究工作是基于一款可以產(chǎn)生納秒級脈沖的大功率脈沖驅(qū)動源展開的。大功率脈沖驅(qū)動源由于其廣泛的應(yīng)用領(lǐng)域近年來被全世界各大公司及研發(fā)機(jī)構(gòu)所關(guān)注。相比國外中高端產(chǎn)品的更新?lián)Q代，國內(nèi)該領(lǐng)域發(fā)展相對滯后，沒有成型的中高端產(chǎn)品面世[1]。究其原因，不僅僅是因?yàn)槔碚撝魏统尚偷脑O(shè)計方案的缺乏，更重要的是設(shè)計者在追求指標(biāo)情況下，沒有過多地研究設(shè)備的電磁兼容性，導(dǎo)致現(xiàn)有電路波形失真度較高，實(shí)用價值較低。 本文首先找出原有電路的缺陷并進(jìn)行相應(yīng)調(diào)整，隨后對原有的脈沖驅(qū)動源核心電路進(jìn)行了電磁兼容性的理論分析及電路優(yōu)化設(shè)計。上述過程包括：電路各單元的電磁兼容性設(shè)計、高速開關(guān)驅(qū)動電路改進(jìn)以及電路結(jié)構(gòu)的優(yōu)化。并進(jìn)行了相應(yīng)的仿真研究，得到的仿真結(jié)果對下一步實(shí)踐有重要的指導(dǎo)意義。 在優(yōu)化原理圖之后，本文進(jìn)行了大功率脈沖驅(qū)動源元器件更新和高頻印刷電路板(PCB)優(yōu)化設(shè)計。實(shí)驗(yàn)過程中選擇了相互之間匹配度更高的核心元器件，并按照高頻印刷電路板設(shè)計原則以及電磁兼容軟件仿真結(jié)果重新設(shè)計了印刷電路板。為了裝配樣機(jī)，本文還在電路中設(shè)計了超短脈沖采樣單元，并引入直流升壓模塊。電路調(diào)試成功后，根據(jù)電磁屏蔽理論設(shè)計大功率脈沖驅(qū)動源樣機(jī)，，這一過程包括整機(jī)裝配原理圖的繪制和樣機(jī)的裝配調(diào)試工作。 本文的獨(dú)特性工作在于，合理分析影響大功率脈沖驅(qū)動源電磁兼容性的各種因素，通過電路優(yōu)化設(shè)計、印刷電路板優(yōu)化設(shè)計、核心元器件選擇、設(shè)備屏蔽設(shè)計以及樣機(jī)電氣連接設(shè)計等方法，全面優(yōu)化了大功率脈沖驅(qū)動源的整體性能。本文將高頻電路分析、橋式驅(qū)動電路、電磁場理論以及電磁兼容解決方案巧妙地引入到大功率脈沖驅(qū)動源的設(shè)計中，并進(jìn)行了大量實(shí)驗(yàn)調(diào)試。優(yōu)化后的大功率脈沖驅(qū)動源很好地抑制了尖峰、過沖及脈沖底部振蕩等電磁干擾現(xiàn)象，脈沖波形的質(zhì)量有了很大的飛躍，而且輸出指標(biāo)的極限參數(shù)相比以往有了一定的提高，真正意義上達(dá)到了國際中高端產(chǎn)品的指標(biāo)，具有較高的實(shí)用價值。在此基礎(chǔ)上，本文總結(jié)了實(shí)驗(yàn)操作過程中的經(jīng)驗(yàn)，對大功率超短脈沖測量方法進(jìn)行了總結(jié)，為該領(lǐng)域的后續(xù)工作打下了基礎(chǔ)。
[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.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN03

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