基于模块化多电平换流器的模块化前后沿可调高压纳秒脉冲发生器的研制

doi:10.19595/j.cnki.1000-6753.tces.181924

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摘要为了研究高压纳秒脉冲的前后沿时间对于离体肿瘤细胞杀伤效果的影响,需要一种能够产生前后沿可调高压纳秒脉冲的发生器。提出了一种基于半桥型模块化多电平换流器（HB-MMC）结构的新型发生器拓扑结构,通过HB-MMC子模块的级联构成2组桥臂,以产生任意极性的高压纳秒脉冲方波;采用MOSFET作为固态开关,并通过控制MOSFET的开关时序,改变导通和关断延迟时间来改变输出脉冲的前后沿。该文首先对提出的发生器拓扑结构以及工作原理进行了详细的介绍;然后采用PSpice仿真软件进行仿真验证,证实了该拓扑结构的正确性与可行性;最后研制了一台5级的脉冲发生器并进行性能测试。测试结果表明,该发生器能够输出幅值0~±4kV可调、脉宽100~500ns可调、频率0~5kHz可调的方波脉冲,且脉冲的上升沿能在15~65ns范围内平滑调节,脉冲的下降沿能在30~100ns范围内平滑调节。

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关键词 ：前后沿可调, 半桥型模块化多电平换流器, 高压纳秒脉冲, 开关时序

Abstract：In order to study the influence of the rise/fall time of high-voltage nanosecond pulses on in vitro tumor cell killing effect, a high-voltage nanosecond pulse generator with adjustable rise/fall time is required. A novel generator topology based on half-bridge modular multilevel converter (HB-MMC) is proposed. Several HB-MMC submodules are connected in series as two arms to generate unipolar/bipolar high voltage nanosecond pulses. MOSFETs are used as solid-state switches. By controlling the switching sequence of the MOSFETs, the rise/fall time of the pulse can be adjusted. In this paper, the proposed topology and its operating principle are introduced in detail and verified by PSpice simulation software. A 5-stage generator was implemented and tested. The test results show that the generator can output nanosecond pulses with adjustable amplitude of 0~±4kV, pulse width of 100~50ns and frequency of 0~5kHz. The rising time of the pulse can be smoothly adjusted in the range of 15~65ns, and the falling time of the pulse can be smoothly adjusted in the range of 30~100ns.

Key words： Adjustable rise/fall time half-bridge modular multilevel converter （HB-MMC） high voltage nanosecond pulses switching sequence

收稿日期: 2018-12-15 出版日期: 2020-03-27

PACS:

TM832

基金资助:国家自然科学基金（51477022）和重庆市科委自然科学基金（cstc2016jcyjA0500）资助项目

通讯作者: 米彦男,1978年生,教授,博士生导师,研究方向为电气设备在线监测与故障诊断、高电压新技术等。E-mail: miyan@cqu.edu.cn

作者简介: 万晖男,1994年生,硕士研究生,研究方向为脉冲功率技术及其应用。E-mail: 389855437@qq.com

引用本文:

米彦, 万晖, 卞昌浩, 彭文成, 桂路. 基于模块化多电平换流器的模块化前后沿可调高压纳秒脉冲发生器的研制[J]. 电工技术学报, 2020, 35(6): 1279-1289. Mi Yan, Wan Hui, Bian Changhao, Peng Wencheng, Gui Lu. Design of Modular High-Voltage Nanosecond Pulse Generator with Adjustable Rise/Fall Time Based on Modular Multilevel Converter Topologies. Transactions of China Electrotechnical Society, 2020, 35(6): 1279-1289.

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https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.181924 https://dgjsxb.ces-transaction.com/CN/Y2020/V35/I6/1279

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