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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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

Received: 15 December 2018 Published: 27 March 2020

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TM832

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	Mi Yan
	Wan Hui
	Bian Changhao
	Peng Wencheng
	Gui Lu

Cite this article:

Mi Yan,Wan Hui,Bian Changhao等. Design of Modular High-Voltage Nanosecond Pulse Generator with Adjustable Rise/Fall Time Based on Modular Multilevel Converter Topologies[J]. Transactions of China Electrotechnical Society, 2020, 35(6): 1279-1289.

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

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