150 kV/1 kHz可调脉宽电晕等离子体驱动源
150 kV/1 kHz corona plasma generator of adjustable pulse width
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摘要: 建立了重复频率、可调脉宽线板放电型电晕等离子体驱动源实验平台，该平台由谐振充电、脉冲升压变压器和磁开关宽脉冲调制等部分构成，试验平台输出脉冲电压峰值150 kV、最高重复频率1 kHz、输出脉冲前沿0.53 μs、脉冲宽度5～25 μs可调节。阐述了该平台脉冲调制原理，通过实验结果分析了脉冲变压器分布电容对系统能量传输的影响，指出提高脉冲氢闸流管开关能力、改善脉冲变压器绝缘结构设计、降低匝间分布电容可以进一步提高输出电压和重复频率。Abstract: The rep-rate wire-plane corona plasma generator experimental platform has been constructed. The platform consists of resonant charging circuit, pulse step up transformer, and magnetic switch for output pulse width adjustment. The platform can generate pulses with 150 kV peak voltage, 0.53 μs rise time, 1 kHz rep-rate and 5～25 μs adjustable pulsed-width. The paper describes the scheme of pulsed-transformer-type power modulator and output pulse-width adjustment. According to the analysis of experimental results, distributed capacitance of pulse transformer’s primary and secondary windings is the main factor affecting power efficiency. At last, this paper, gives out several critical points to improve this type of corona plasma generator.
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