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A Step-Up Modular High-Voltage Pulse Generator Based on Isolated Input-Parallel/Output-Series Voltage-Boosting Modules and Modular Multilevel Sub-modules

Research output: Contribution to journalJournal articlepeer-review

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  • Ahmed Darwish
  • Mohamed A. A. Elgenedy
  • Stephen Finney
  • Barry Williams
  • James R. Mcdonald
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<mark>Journal publication date</mark>13/03/2019
<mark>Journal</mark>IEEE Transactions on Industrial Electronics
Issue number3
Volume66
Number of pages10
Pages (from-to)2207-2216
Publication StatusPublished
Early online date13/11/17
<mark>Original language</mark>English

Abstract

Irreversible electroporation for disinfection applications involve exposing the specimen cell-membrane to a pulsed electric field in order to kill harmful microorganisms. High voltage (HV) pulses of relatively short durations in range of few micro-seconds, are generated across the sample chamber. The HV pulse specifications such as: voltage magnitude, waveform, repetition rate, and duration differ according to the conditions of the sample being processed. This paper proposes a new step-up power electronic converter topology for generating the required HV pulses from a relatively low input voltage. The converter consists of two main stages; the first stage is responsible for boosting the input voltage to the desired level using input-parallel/output-series connected dc/dc modules while the second stage forms the required HV pulses with the proper magnitude, duration and repetition rate using modular multilevel converter sub-modules. The proposed topology is able to produce the HV pulses with controlled voltage and current stresses across the employed semiconductor switches and diodes, hence, it can be implemented with the market-available semiconductor technology. Mathematical analysis of the proposed topology is developed and MATLAB/Simulink simulation results explore operational conditions. Experimental results from a scaled-down prototype validate the functionality of the proposed system.

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©2017 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.