Repetitive frequency high voltage long pulse power supply based on Marx topology with semiconductor switch
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摘要: 为满足如速调管等对输出长达毫秒量级脉冲调制器需求，介绍一种基于Marx电路的长脉冲高压脉冲电源，它采用固态半导体开关作为主放电开关，通过在Marx每一级单元引入独立的充电半导体开关，解决了Marx采用电阻对储能电容充电导致无法高重频工作的问题。设计一辅助电源给每一级Marx单元半导体开关的驱动电路供电，通过光纤触发，可输出1 ms以上的长脉冲。采用该电路设计的Marx验证装置共有6级，可输出电压幅度−10 kV/ 1 A、脉冲宽度1 ms的长脉冲，输出短脉冲时最高输出频率达50 kHz以上。Abstract: To meet the demand of modulator power supplies, such as klystrons with output pulses of up to milliseconds, this article describes a long pulse high-voltage pulse power supply based on the Marx circuit. It uses solid-state semiconductor switches as the main discharge switches. Introducing independent charging semiconductor switches at each stage of the Marx units, it solves the limitation of Marx structures that use resistors to charge energy storage capacitors and cannot operate at high repetition rates. In addition, adding an auxiliary power supply to power the driving circuit of each stage’s Marx unit semiconductor switch, it can output long pulses of up to 1ms or more when triggered by optical fibers. The verification device designed using this Marx circuit has 6 basic charging and discharging units, which can output long pulses with an amplitude of −10 kV/1 A and a width of 1 ms. When outputting short pulses, the maximum output frequency exceeds 50 kHz.
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Key words:
- high voltage pulse power supply /
- semiconductor switch /
- Marx topology /
- long pulse
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图 1 Marx 长脉冲输出电路原理图
Figure 1. Schematic diagram of the long pulse output circuit based on the Marx structure
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