大功率TEA CO2激光系统的电磁兼容设计

大功率TEA CO2激光系统工作时产生的强电磁干扰主要来源于激光主放电回路、脉冲火花开关和电源。这种强电磁脉冲干扰对激光系统内部及相关外部设备的电子系统具有很大的干扰和破坏作用。对大功率TEA CO2激光系统的电磁干扰进行了分析计算,在此基础上对大功率TEA CO2激光系统进行了EMC设计。硬件设计手段分别采用了对电磁干扰源和控制子系统进行屏蔽、系统合理布局与布线、滤波隔离,软件采用了数据冗余纠错、冗余化操作和数据鉴别等抑噪和纠错技术,有效地抑制了干扰电磁波在系统内外的传播,解决了大功率TEA CO2激光系统EMC问题。结果表明,对电磁干扰源和控制子系统进行屏蔽,系统合理布局与布线、滤波隔离等措施,是抑制电磁干扰,保证激光控制子系统硬件不受损坏的主要手段。软件抗干扰,是硬件抑制电磁干扰措施的补充和延伸,能使激光系统具有很高的可靠性。

EMC design of high-power TEA CO2 laser system

The strong electromagnetic interference generated in the operation of the high-power TEA CO2 laser system mainly comes from the main discharge loop, pulse spark switch and power supply module. Such a strong electromagnetic interference has high interference and damage to the electronic systems inside and outside the laser system itself. The EMC of the laser system is designed based on the analysis and calculation of the electromagnetic interference to the laser system itself. The EMC problem of the high power TEA CO2 laser is settled by suppressing the propagation of the interference electromagnetic wave using two methods: one is the hardware method, the other is the software one. The hardware design way adopts electromagnetic shielding of the interference source and controlling sub-system, appropriate system layout and wiring, filtering isolation, while the software design way uses noise depression including data redundancy debugging, redundancy operation and data identification. The experimental results show that the adopted methods are effective and main ways in suppressing the interference and protecting the laser control sub-system to be damaged. Software anti-jamming is the extension and supplement of the hardware interference suppression methods, all the methods can guarantee the high reliability of the laser system.