Design of Modular High-Voltage Nanosecond Pulse Generator with Adjustable Rise/Fall Time Based on Modular Multilevel Converter Topologies
Mi Yan1, Wan Hui1,2, Bian Changhao3, Peng Wencheng1, Gui Lu1
1. State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Chongqing 400044 China;; 2. Economic Research Institute of State Grid Jiangxi Electric Power CompanyNanchang 330096 China; 3. State Grid Jiangsu Electric Power Company Technician Training Center Suzhou 215000 China
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.
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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2020, Vol. 35 
