论文部分内容阅读
微空心阴极放电(MHCD)是在普通空心阴极放电的基础上提出的一种高气压下亚毫米级微放电技术。将MHCD作为大体积辉光放电的外部电离源(即等离子体源),可以解决高气压下大体积辉光放电不稳定的问题。在MHCD实验的基础上,研制出可对MHCD气体放电模式(连续/脉冲)和输出功率进行调控的开关电源。这种开关电源可以与单片机、微机等其他外部控制设备相连。该电源采用全桥软开关技术,串联谐振并联输出,4个MOSFET管为主控制元件,实现了高频工作,响应快速。脉冲模式工作时避免了开关管的硬开关,减小了高次谐波对电网干扰;无需镇流电阻也可实现气体稳定放电。
Micro-hollow cathode discharge (MHCD) is a kind of sub-millimeter micro-discharge technology under high atmospheric pressure which is put forward on the basis of ordinary hollow cathode discharge. Using MHCD as external ionization source (ie, plasma source) for large-volume glow discharge can solve the problem of large-volume glow discharge instability under high pressure. Based on the MHCD experiment, a switching power supply that can regulate the MHCD gas discharge mode (continuous / pulse) and output power is developed. This switching power supply can be connected with other external control devices such as a microcontroller and a microcomputer. The power supply using full-bridge soft-switching technology, parallel resonant series output, four MOSFET-based control components, to achieve high-frequency work, fast response. Pulse mode to avoid the hard work of the switch switch, reducing the high harmonics on the grid interference; no ballast resistor can achieve stable gas discharge.