Investigation of a compact solid-state Marx generator
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摘要: 提出利用P型开关作为充电管、N型开关作为放电管串联形成半桥结构，将其门极也短接，以同一个信号同时驱动充电管和放电管。再利用共原边的串心磁环驱动方案，只需一个半桥电路就可以从原边同时传递驱动功率和信号，同步驱动所有充电管和放电管，大幅简化了脉冲电源结构和尺寸，降低了成本。以此搭建了24级固态Marx发生器，在10 kΩ阻性负载上，获得了10 kV、1 kHz、5 μs的高压方波脉冲，验证了方案的可行性，该电源主电路的尺寸仅为20 cm（长）×13 cm（宽）×5.5 cm（高）。Abstract: This paper proposes compact solid-state Marx generator based on half-bridge structure. In each stage, an NPN MOSFET as the charging switch and a PNP MOSFET as the discharging switch forms a half-bridge circuit, and both their gates and sources are short circuited so that they can be triggered with the same signal. Using many transformers with their primary windings in series, only one half-bridge circuit on the primary side is used to transfer both the driving power and control signals. Then all the charging switches and discharging switches are driven simultaneously, which greatly simplifies the structure and size of solid-state Marx generators and reduces costs. In this way, a 24-stage solid-state Marx generator prototype was built, and high-voltage square pulses of 10 kV, 1 kHz and 5 μs was obtained on a 10 kΩ resistive load. The feasibility of the scheme is verified, and the size of the main circuit is only 20 cm (length)×13 cm (width)×5.5 cm (height).
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Key words:
- pulse generator /
- Marx generator /
- high-voltage pulses /
- synchronous driving /
- square pulses
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图 4 控制信号和开关当作时序图
Figure 4. Timing sequence of signals, gate voltage and drain-source voltage
图 5 基于N&P型开关的固态Marx发生器的仿真电路图
Figure 5. Simulation circuit of a solid-state Marx generator based on N&P type MOSFETs
图 8 N&P型开关的导通管压降Vds波形对比图
Figure 8. Comparison of conduction tube voltage drop Vds waveforms for N&P type switches
表 1 驱动源各项参数
Table 1. Various parameters of the driving source
driving source TD/μs TR/μs TF/μs PER/μs PW/μs V1/V V2/V Vai 0.1 0.1 0.1 50 19.5 0 −15 Vbi 20 0.1 0.1 50 5 0 15 
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