Full-bridge modular multilevel submodule-based high-voltage bipolar pulse generator with low-voltage DC, input for pulsed electric field applications

Ibrahim Abdelsalam, Mohamed A. Elgenedy, Shehab Ahmed, Barry W. Williams

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

High-voltage (HV) pulse generators (PGs) are the core of pulsed electric field applications. Applying HV pulses produces electrical pores in a biological cell membrane, in which if the size of the pores increases beyond a critical size, the cell will not survive. This paper proposes a new HV-PG based on the modular multilevel converter with full-bridge submodules (FB-SMs). In order to alleviate the need of complicated sensorless or sensorbased voltage balancing techniques for the FB-SM capacitors, a dedicated self-regulating charging circuit is connected across each FB-SM capacitor. The individual capacitor charging voltage level is obtained from three successive stages, namely, convert the low-voltage dc input voltage to a high-frequency square ac voltage, increase the ac voltage level via a nanocrystalline step-up transformer, and rectify the secondary transformer ac voltage via a diode FB rectifier. The HV bipolar pulses are formed across the load in a fourth stage through series connected FB-SMs. The flexibility of inserting and bypassing the FBSM capacitors allows the proposed topology to generate different pulse-waveform shapes, including rectangular waveforms with specifically reduced dv/dt and ramp pulses. The practical results, from a scaled-down experimental rig with five FB-SMs and a 1-kV peak-to-peak pulse output, validate the proposed topology.

Original languageEnglish
Article number8024172
Pages (from-to)2857-2864
Number of pages8
JournalIEEE Transactions on Plasma Science
Volume45
Issue number10
DOIs
Publication statusPublished - 1 Oct 2017

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pulse generators
low voltage
high voltages
direct current
electric fields
capacitors
electric potential
pulses
transformers
charging
waveforms
topology
porosity
automatic control
rectifiers
ramps
converters
flexibility
diodes
output

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

Cite this

Full-bridge modular multilevel submodule-based high-voltage bipolar pulse generator with low-voltage DC, input for pulsed electric field applications. / Abdelsalam, Ibrahim; Elgenedy, Mohamed A.; Ahmed, Shehab; Williams, Barry W.

In: IEEE Transactions on Plasma Science, Vol. 45, No. 10, 8024172, 01.10.2017, p. 2857-2864.

Research output: Contribution to journalArticle

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