大功率TEA CO2激光器系统中电磁干扰的抑制

大功率TEA CO2激光器系统产生的强电磁干扰主要来源于激光器主放电回路、脉冲火花开关和电源。这种强电磁干扰使大功率TEA CO2激光器控制子系统出现数据混乱、显示屏帧频滚动及功率模块损坏等电磁兼容问题。对大功率TEA CO2激光器系统中产生强电磁干扰的部位和干扰途径进行了测试及分析。通过调整放电回路的参数降低电磁干扰强度，采用埋入式同轴高压电连接器专利技术对主放电回路进行屏蔽，控制子系统选用PLC为控制核心及屏蔽滤波，软件中输入及输出程序的抗干扰设计等措施，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激光器系统电磁兼容问题。结果表明:主动降低电磁干扰强度和对电磁干扰源进行屏蔽，提高控制子系统硬件抑噪能力等措施，是抑制电磁干扰，保证激光器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，能使激光器系统具有很高的可靠性。

Suppression of electromagnetic interference in high power TEA CO2 laser system

The strong electromagnetic interference generated in high power TEA CO2 laser system mainly comes from the main discharge circuit, pulse spark switch and power supply. Such strong electromagnetic interference causes some problems such as data confusion, display frame frequency rolling and damage of power module, etc. in the high power TEA CO2 laser control sub-system. The parts in the high power TEA CO2 laser system where the strong electromagnetic interference occurs and the interference means are tested and analyzed. Adjusting the parameters of the discharge circuit to reduce the electromagnetic interference strength, adopting the patent technology of the buried coaxial high-voltage electric connector to shield the main discharge return circuit, using the PLC as the control core and shie