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高压保护开关缓冲电路参数优化设计

李志恒 马少翔 张鸿淇 朱帮友 张明 于克训 潘垣

李志恒, 马少翔, 张鸿淇, 等. 高压保护开关缓冲电路参数优化设计[J]. 强激光与粒子束. doi: 10.11884/HPLPB202335.230158
引用本文: 李志恒, 马少翔, 张鸿淇, 等. 高压保护开关缓冲电路参数优化设计[J]. 强激光与粒子束. doi: 10.11884/HPLPB202335.230158
Li Zhiheng, Ma Shaoxiang, Zhang Hongqi, et al. Parameter optimization design of snubber circuit for high voltage protection switch[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202335.230158
Citation: Li Zhiheng, Ma Shaoxiang, Zhang Hongqi, et al. Parameter optimization design of snubber circuit for high voltage protection switch[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202335.230158

高压保护开关缓冲电路参数优化设计

doi: 10.11884/HPLPB202335.230158
基金项目: 国家重点研发计划项目(2017YFE0300104); 国家自然科学基金项目(51821005)
详细信息
    作者简介:

    李志恒,zhihengli@hust.edu.cn

    通讯作者:

    马少翔,mashaoxiang@hust.edu.cn

  • 中图分类号: TM832

Parameter optimization design of snubber circuit for high voltage protection switch

  • 摘要: 目前的高压保护开关缓冲电路参数设计缺乏相关理论设计方法,同时缓冲电路方案由于设计过程中并未考虑分布电容影响,因此均为等参数设计方案,这种方法均压效果不够理想。为了解决目前参数设计中存在的问题,首先建立了含缓冲电路和杂散电感的MOSFET模型并对其关断过程进行了分析,从而得到了抑制电压尖峰的缓冲电路理论设计方法及表达式。针对于串联均压未考虑分布电容的问题,通过构造等电位点,建立了含有分布电容的等效电路并进行分析,根据电荷方程等式得到了缓冲电路非等参数设计方法及表达式,该参数设计方法可以补偿分布电容造成的电压分布不均,并更好地指导高压保护开关的均压方案设计。为了验证参数设计的合理性进行了仿真分析,结果表明,最终得到的整体设计方案可以满足尖峰抑制以及均压的设计要求。
  • 图  1  电压钳位型均压电路原理图

    Figure  1.  Schematic diagram of voltage clamp voltage-balancing circuit

    图  2  电压钳位型均压电路工作原理图

    Figure  2.  Working principle diagram of voltage clamp voltage-balancing circuit

    图  3  新型均压拓扑原理图

    Figure  3.  New voltage-sharing topology schematic diagram

    图  4  拓扑工作模式示意图

    Figure  4.  Schematic diagram of topology working mode

    图  5  分析电路示意图

    Figure  5.  Schematic diagram of analytical circuit

    图  6  SiC MOSFET关断波形图

    Figure  6.  SiC MOSFET turn-off waveforms

    图  7  MOSFET串联模型示意图

    Figure  7.  Schematic diagram of MOSFET series model

    图  8  考虑分布电容和缓冲电路的串联MOSFET等效电路

    Figure  8.  Equivalent circuit of series MOSFET considering distributed capacitor and snubber circuit

    图  9  等电位点电路图

    Figure  9.  Isoelectric point circuit diagram

    图  10  简化等效电路图

    Figure  10.  Simplified equivalent circuit diagram

    图  11  无缓冲电路的电压电流波形图

    Figure  11.  Voltage and current waveforms without snubber circuit

    图  12  m=1.1时的电压电流波形图

    Figure  12.  Voltage and current waveforms of m=1.1

    图  13  m=1.2时的电压电流波形图

    Figure  13.  Voltage and current waveforms of m=1.2

    图  14  无缓冲电路的两管电压波形图

    Figure  14.  Two-tube voltage waveforms without snubber circuit

    图  15  等参数缓冲电路的两管电压波形图

    Figure  15.  Two-tube voltage waveform of isoparametric snubber circuit

    图  16  非等参数缓冲电路的两管电压波形图

    Figure  16.  Two-tube voltage waveform of non-isoparametric snubber circuit

    表  1  拓扑工作模式

    Table  1.   Topology working mode

    Pattern T1 T2 Module voltage Single tube current Function
    1 on on 0 i1/2 Over-current balancing
    2 on off 0 i1 Conduction discharge
    3 off off V1 0 Current shutoff
    4 off on 0 i1 Conduction discharge
    下载: 导出CSV

    表  2  MOSFET工作模式

    Table  2.   Working mode of MOSFET

    Operation mode Cgs Cgd Cds Channel condition
    VgsVth and VdsVgs-Vth Ohmic Cgs Cgd2 Cds2 Constant resistance Rds(on)
    VgsVth Cut off Cgs Cgd1 Cds1 Open circui
    下载: 导出CSV
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出版历程
  • 收稿日期:  2023-05-30
  • 修回日期:  2023-09-07
  • 录用日期:  2023-09-19
  • 网络出版日期:  2023-11-09

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