A High-Gain, High-Voltage Pulse Generator Using Sequentially Charged Modular Multilevel Converter Submodules, for Water Disinfection Applications

Elgenedy, Mohamed A.; Massoud, Ahmed M.; Ahmed, Shehab; Williams, B.W.

doi:10.1109/jestpe.2017.2750244

Cited by 39 publications

(35 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The proposed BMPG is shown in Fig. 8 In order to obtain HV pulses from an LV input supply, MMC sequential charging was used in [36] instead of charging the capacitors in parallel as in Marx generator. This allows reduced rated IGBTs.…”

Section: A Bmpg Topology Descriptionmentioning

confidence: 99%

“…Reference [36] presents an improvement by charging two SM capacitors (one from the upper arm and one from the lower arm) simultaneously. Adding a boost converter in the input stage with sequential charging, as in [37], deteriorates the repetition time as the charging time of the SM capacitors is divided into two parts.…”

Section: Arm2mentioning

confidence: 99%

“…First, the boost converter inductor is energized, and then the capacitor is charged. The topology in [36]- [37] is constrained to rectangular pulses and requires switches with reverse blocking capabilities [38]- [39].…”

Section: Arm2mentioning

confidence: 99%

See 2 more Smart Citations

A Modular Multilevel Voltage-Boosting Marx Pulse-Waveform Generator for Electroporation Applications

Elgenedy

Massoud

Ahmed

et al. 2019

IEEE Trans. Power Electron.

Self Cite

View full text Add to dashboard Cite

In order to overcome the limitations of the existing classical and solid-state Marx Pulse Generators, this paper proposes a new modular multilevel voltage-Boosting Marx Pulse Generator (BMPG). The proposed BMPG has hardware features that allow modularity, redundancy and scalability as well as operational features that alleviate the need of series connected switches and allows generation of a wide range of pulse waveforms. In the BMPG, a controllable low-voltage input boost converter supplies, via Directing/Blocking (D/B) diodes, two arms of a series modular multilevel converter Half-Bridge Sub-Modules (HB-SMs). At start up, all the arm's SM capacitors are resonantly charged in parallel from 0V, simultaneously via directing diodes, to a voltage in excess of the source voltage. After first pulse delivery, the energy of the SM capacitors decreases due to the generated pulse. Then, for continuous operation without fully discharging the SM capacitors or having a large voltage droop as in the available Marx generators, the SM-capacitors are continuously recharged in parallel, to the desired boosted voltage level. Because all SMs are parallel connected, the boost converter duty ratio is controlled by a single voltage measurement at the output terminals of the boost converter. Due to the proposed SMs structure and the utilization of D/B diodes, each SM capacitor is effectively controlled individually without requiring a voltage sensor across each SM capacitor. Generation of the commonly used pulse waveforms in electroporation applications is possible, whilst assuring balanced capacitors, hence SM voltages. The proposed BMPG has several topological variations, such as utilizing a buck-boost converter at the input stage and replacing the HB-SM with full-bridge SMs. The proposed BMPG topology is assessed by simulation and scaled-down proof-of-concept experimentation to explore its viability for electroporation applications.

show abstract

Section: A Bmpg Topology Descriptionmentioning

confidence: 99%

Section: Arm2mentioning

confidence: 99%

See 1 more Smart Citation

A Modular Multilevel Voltage-Boosting Marx Pulse-Waveform Generator for Electroporation Applications

Elgenedy

Massoud

Ahmed

et al. 2019

IEEE Trans. Power Electron.

Self Cite

View full text Add to dashboard Cite

show abstract

“…The existing modularity with modular multilevel converter (MMC) sub-modules (SMs) has been harnessed to generate HV pulses for IRE [8]- [14]. Not only conventional rectangular pulse-waveforms can be generated by MMC based PGs, but a wide range of pulse-waveforms is also possible [5] and [10].…”

mentioning

confidence: 99%

“…They require balancing of the individual SM capacitor voltages, ramping the HVDC input at start-up/shutdown, and protection against HVDC side faults. An exception for obtaining stepped-up voltage pulse from low voltage (LV) DC input are [13] and [14], where several series connected MMC SM capacitors are charged sequentially, then connected in series across the load to discharge. However, the voltage step-up and the pulse repetition frequency are dependent on the number of SMs and the charging process is achieved via resistors in [13] and via resistive-inductive branch in [14].…”

mentioning

confidence: 99%

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

Darwish

Elgenedy

Finney

et al. 2019

IEEE Trans. Ind. Electron.

Self Cite

View full text Add to dashboard Cite

Irreversible electroporation for disinfection applications involve exposing the specimen cellmembrane 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 inputparallel/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.

show abstract

Introduction

Viatkin¹

2023

Springer Theses

View full text Add to dashboard Cite

A High-Gain, High-Voltage Pulse Generator Using Sequentially Charged Modular Multilevel Converter Submodules, for Water Disinfection Applications

Abstract: His research interests include mechatronics, solid-state power conversion, electric machines, and drives. Barry W. Williams received the M.Eng.Sc. degree from the

Cited by 39 publications

References 23 publications

A Modular Multilevel Voltage-Boosting Marx Pulse-Waveform Generator for Electroporation Applications

A Modular Multilevel Voltage-Boosting Marx Pulse-Waveform Generator for Electroporation Applications

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

Introduction

Contact Info

Product

Resources

About