A step-up modular high-voltage pulse generator based on isolated input-parallel/output-series voltage-boosting modules and modular multilevel sub-modules

Ahmed Darwish, Mohamed A. Elgenedy, Stephen J. Finney, Barry W. Williams, Jim R. McDonald

Research output: Contribution to journalArticlepeer-review

Abstract

Irreversible electroporation (IRE) 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 microseconds, 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 submodules. 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.
Original languageEnglish
Pages (from-to)2207-2216
Number of pages10
JournalIEEE Transactions on Industrial Electronics
Volume66
Issue number3
Early online date13 Nov 2017
DOIs
Publication statusPublished - Mar 2019

Keywords

  • DC/DC converters
  • irreversible electroporation
  • modular multilevel converters (MMCs)
  • pulse waveforms generator
  • pulsed electric field
  • voltage boosting

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