4 MV感应电压叠加器的电压测量

卫兵; 郭帆; 康军军; 耿力东; 李勇; 夏明鹤

doi:10.11884/HPLPB202335.230168

4 MV感应电压叠加器的电压测量

doi: 10.11884/HPLPB202335.230168

中国工程物理研究院流体物理研究所，脉冲功率科学与技术重点实验室，四川绵阳 621999

基金项目: 国家自然科学基金项目(51907181)

详细信息

作者简介:
卫　兵，73wb@163.com

中图分类号: TM835.4
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- 被引次数: 0
出版历程
- 收稿日期: 2023-06-04
- 修回日期: 2023-07-25
- 录用日期: 2023-07-30
- 网络出版日期: 2023-08-08
- 刊出日期: 2023-09-15

Voltage measurement for 4 MV induction voltage adder

Key Laboratory of Pulsed Power, Institute of Fluid Physics, CAEP, Mianyang 621999, China

摘要

摘要: 为测量4 MV感应电压叠加器的电压，设计和标定了多个D-dot电压探头。频响测试结果表明探头频率上限大于270 MHz，满足待测电压信号频率响应需求。标定中，由于分压器与探头的安装位置不同，为了避免传输线阻抗失配导致快前沿电压信号在不同测量点的电压波形差异，采用前沿数百纳秒的脉冲信号开展标定。由于探头的低频特性同时满足标定与实测的需求，因而标定的准确性得以保证。考虑装配结构及精度对探头灵敏度的直接影响，次级电压探头采取了在感应腔逐级安装过程中的在线标定方法。由于靠近二极管的电压探头受到电子等影响导致波形畸变，因此直接测量负载电压存在困难。4 MV装置的多发实验结果表明，输出端传输线上电压波形与其下游位置电压波形之差，与用两者之间电感计算的电压波形相吻合，说明采用二极管上游电压探头的测量结果来计算二极管电压是行之有效的。
- 感应电压叠加器 /
- 脉冲电压 /
- D-dot探头 /
- 频率响应 /
- 标定
Abstract: Multiple D-dot voltage probes were designed and calibrated to measure the voltage of a 4 MV induction voltage adder. The frequency response test results indicate that the upper limit of the probe frequency is greater than 270 MHz, which meets the frequency response requirements of the voltage signal to be tested. In calibration, due to the different installation positions of the voltage divider and probe, in order to avoid the mismatch of transmission line impedance causing voltage waveform differences in the fast rising voltage signal at different measurement points, a pulse signal with a front edge of about hundreds of nanoseconds is used for calibration. Due to the low-frequency characteristics of the probe meeting both calibration and actual measurement requirements, the accuracy of calibration can be guaranteed. Considering the direct impact of assembly structure and accuracy on the sensitivity of the probe, the output transmission line probe adopts an online calibration method during the step-by-step installation process of the induction cavity. Due to the influence of electrons and other factors on the voltage probe near the diode, waveform distortion occurs, making it difficult to directly measure the load voltage. The results of multiple experiments on a 4 MV device indicate that the difference between the voltage waveform on the output transmission line and its downstream position is consistent with the voltage waveform calculated using the inductance between the two position, indicating that using the measurement results of the upstream voltage probe of the diode to calculate the diode voltage is effective.
- induction voltage adder /
- voltage pulse /
- D-dot sensor /
- frequency response /
- calibration

HTML全文

图 1 IVA驱动器的横截面结构与探头位置示意图

Figure 1. Schematic cross-section view of the voltage adder system

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图 2 D-dot结构图

Figure 2. Structural diagram of D-dot

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图 3 探头的幅频响应特性

Figure 3. Amplitude-frequency response of D-dot

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图 4 探头H的标定电路

Figure 4. Calibration circuit of probe H

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图 5 探头H标定波形

Figure 5. Calibration waveform of probe H

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图 6 感应腔的输入电压波形

Figure 6. Input voltage waveform of IVA

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图 7 感应腔的输出电压波形

Figure 7. Output voltage waveform of IVA

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图 8 感应腔的角向线电压波形

Figure 8. Voltage waveform of azimuthal transmission lines

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图 9 角向线电压仿真波形

Figure 9. Simulated voltage waveform of azimuthal transmission lines

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图 10 F和H位置的电压波形比较

Figure 10. Comparison of voltage waveforms at positions F and H

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图 11 二极管电压计算波形

Figure 11. Diode voltage calculation waveform

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