强激光器开关电源控制系统设计与实现

发布时间：2018-05-22 20:32

  本文选题：强激光器 + 强激光开关电源　； 参考：《电子科技大学》2014年硕士论文

【摘要】：通过调研气体激光器及气体激光电源的发展,对比国内外气体激光器电源达到的技术状态,分析了激光器电源研制的意义,结合激光器的特点,总结气体激光器电源存在的问题及研究方向。针对激光器开关电源控制系统的特殊性,先分析了强激光器开关电源的工作原理,以及强激光器放电对控制系统的影响。分析了多种激光器充电模式,确定选用全桥串联谐振主回路作为强激光器开关电源拓扑回路,既具有抗负载短路特性,也具有软开关特性,对外围电路干扰小,同时降低了了高次谐波对外电网的干扰。IGBT为主开关器件,可实现高频、高功率输出,可以快速关断,避免对负载造成更大的危害,综合考虑强激光器的特性,可选择DSP、FPGA或单片机作为开关电源主控系统,考虑到DSP等价格较高且编程较复杂,关键是供电电压较低,容易受强脉冲干扰,最终确定选用5V供电的AT89C52作为控制芯片。通过过上位机进行远程控制,对强激光器的各种功能进行控制,包括电压设置、频率设置、脉冲个数设置及各种故障状态反馈,实现智能化控制系统。针对强激光器的特殊性,具有较强的电磁干扰,采取了理论和实践结合增加了多重抗干扰措施。屏蔽干扰是电源控制系统正常运行的基本保障,干扰信号不仅仅通过导线传递还可以同空间传递,当干扰环形相对恶劣时,无法通过硬件完全屏蔽干扰或者屏蔽代价过高时往往会使用软件和硬件结合的方式处理,单片机系统是通过循环执行指令来完成各种控制,在指令执行过程中检测到干扰信号会执行错误的判断,引起程序执行错误或者乱跑的现象,可以根据具体情况对软件进行优化,避免执行错误的指令。该控制系统采用单片机AT89C52作为处理器,采取了一系列抗干扰措施实现了强激光器开关电源的可靠控制,通过和上位机通讯实现了对强激光器开关电源的智能化操作,兼容了小型化和模块化的设计,便于大规模生产。
[Abstract]:By investigating the development of gas laser and gas laser power supply, the technical status of gas laser power supply at home and abroad is compared, and the significance of laser power source development is analyzed, combined with the characteristics of laser. The existing problems and research direction of gas laser power supply are summarized. In view of the particularity of the laser switching power supply control system, the working principle of the strong laser switching power supply and the influence of the strong laser discharge on the control system are analyzed. In this paper, several charging modes of laser are analyzed, and the main circuit of full-bridge series resonance is chosen as the topology circuit of strong laser switching power supply, which has both anti-load short-circuit characteristic and soft switching characteristic, and has little interference to peripheral circuit. At the same time, it reduces the interference of high order harmonic external power grid. IGBT is the main switch device, which can realize high frequency and high power output, can turn off quickly, avoid more harm to the load, and consider the characteristics of strong laser synthetically. DSP FPGA or single chip microcomputer can be chosen as the main control system of switching power supply. Considering the high price and complex programming of DSP, the key point is that the power supply voltage is lower and easy to be interfered by strong pulse. Finally, the 5V power supply AT89C52 is selected as the control chip. Through remote control over the host computer, various functions of the strong laser are controlled, including voltage setting, frequency setting, pulse number setting and various fault state feedback, to realize the intelligent control system. In view of the particularity of the strong laser, it has strong electromagnetic interference, so the theory and practice are combined to increase the multiple anti-jamming measures. Shielding interference is the basic guarantee for the normal operation of the power supply control system. The interference signal can be transmitted in the same space not only through the wire, but also in the same space, when the interference ring is relatively bad, When the interference can not be completely shielded by hardware or the cost of shielding is too high, it is often handled by the combination of software and hardware. In the process of execution of instructions, the detection of interference signals will carry out the wrong judgment, which will cause the program execution errors or the phenomenon of running around. The software can be optimized according to the specific situation to avoid the execution of wrong instructions. A series of anti-jamming measures are adopted to realize the reliable control of the switching power supply of the strong laser, and the intelligent operation of the switching power supply of the strong laser is realized by communicating with the host computer. Compatible with miniaturization and modular design, convenient for mass production.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN86;TN248
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本文编号：1923511