基于Boost闭环控制的恒峰值双极性脉冲发生器的研制

彭媛媛; 陈文光; 卢杨; 刘之戬; 欧林祥; 左芊

doi:10.11884/HPLPB202234.220179

基于Boost闭环控制的恒峰值双极性脉冲发生器的研制

doi: 10.11884/HPLPB202234.220179

南华大学电气工程学院，湖南衡阳 421001

基金项目: 国家重点研发计划项目(2018YFE0303103)

详细信息

作者简介:
彭媛媛，2836735028@qq.com

通讯作者:
陈文光，chenwg@usc.edu.cn

中图分类号: TM823
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- 被引次数: 0
出版历程
- 收稿日期: 2022-05-31
- 修回日期: 2022-07-25
- 网络出版日期: 2022-08-01
- 刊出日期: 2022-09-20

Development of constant peak bipolar pulse generator based on Boost closed-loop control

School of Electrical Engineering, University of South China, Hengyang 421001, China

摘要

摘要: 在肿瘤消融、污水处理等领域的脉冲功率技术应用中，研究发现双极性电脉冲往往比单极性电脉冲效果更佳，这极大地刺激了双极性高压脉冲电源的研发需求。设计了一台基于Boost闭环控制的恒峰值双极性脉冲发生器，该发生器结合boost电路与Marx发生器的特点，实现了具有升压功能的双极性脉冲的产生，且利用峰值检测电路对双极性脉冲发生器的输出峰值进行取样，并反馈到DSP处理器，实现峰值电压闭环控制，从而实现双极性脉冲恒定峰值的输出。为了验证提出的拓扑电路的可行性与稳定性，对5级恒峰值双极性脉冲发生器进行了仿真和实验研究。实验结果表明，当输入电压在100 V时，可产生重复频率5 kHz、脉冲宽度5～10 μs、电压幅值为±2.0 kV的恒峰值双极性脉冲波形。该脉冲电源使用模块化设计，便于级联，结构紧凑，可灵活输出恒峰值的双极性或单极性正（负）脉冲。
- 高压脉冲电源 /
- boost电路 /
- Marx发生器 /
- 双极性脉冲 /
- 峰值检测 /
- 闭环控制
Abstract: In the application of pulse power technology in tumor ablation, sewage treatment and other fields, it is found that bipolar electric pulse is often better than unipolar electric pulse, which greatly stimulates the research and development demand of bipolar high-voltage pulse power supply. A constant peak bipolar pulse generator is designed based on Boost closed-loop control. The generator perfectly combines the characteristics of Boost circuit and Marx generator to realize the generation of bipolar pulse with boost function. The peak detection circuit is used to sample the peak value of bipolar pulse and feed it back to DSP to realize closed-loop control, so as to realize the output of constant peak bipolar pulse. To verify the feasibility and stability of the proposed topology circuit, simulation and experiment of the developed 5-stage constant peak bipolar pulse generator are carried out. The experimental results show that when the input voltage is 100 V, a constant peak bipolar pulse waveform with repetition frequency of 5 kHz, pulse width of 5−10 μs and voltage amplitude of ±2.0 kV can be generated. The pulse power supply uses modular design, which is easy to cascade, compact, and can flexibly output bipolar or unipolar positive (negative) pulses with constant peak value.
- high voltage pulse power supply /
- Boost circuit /
- Marx generator /
- bipolar pulse /
- peak detection /
- closed-loop control

HTML全文

图 1 Boost闭环控制的恒峰值双极性脉冲发生器的结构框图

Figure 1. Structure block diagram of constant peak bipolar pulse generator with boost closed loop control

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图 2 主电路拓扑结构

Figure 2. Main circuit topology

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图 3 开关管导通时序

Figure 3. Switch on sequence

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图 4 峰值检测电路

Figure 4. Peak detection circuit

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图 5 驱动电路原理图

Figure 5. Schematic diagram of driving circuit

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图 6 控制信号时序图

Figure 6. Control signal sequence

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图 7 升压占空比D=75.0%下负载电压仿真波形

Figure 7. Simulation waveform of load voltage under boost duty ratio D=75.0%

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图 8 2.0 kV恒峰值双极性脉冲仿真波形

Figure 8. 2.0 kV constant peak bipolar pulse simulation waveform

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图 9 实物样机

Figure 9. Physical prototype

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图 10 升压占空比D=66.7%时升压型双极性脉冲波形

Figure 10. Boost bipolar pulse waveform when boost duty ratio D=66.7%

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图 11 2.0 kV恒峰值双极性脉冲波形

Figure 11. 2.0 kV constant peak bipolar pulse waveform

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表 1 仿真参数设置

Table 1. Simulation parameter settings

U_in/V f_B//kHz D/% L_B/mH L/mH C/μF f/kHz d_max/% R_L/kΩ

100 50 66.7 1.2 20 2 5 5 1

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