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Development of a versatile Marx generator for electroporation in food processing

STSM by Mohammed Hamza Bermaki, PhD Student

Period of mission: from 01/04/2015 to 31/05/2015

Home institution: APELEC Laboratory, Djillali Liabes University, Sidi Bel Abbes, Algeria

Host institution: University of Ljubljana, Faculty of Electrical Engineering, Ljubljana, Slovenia

Nowadays many pulse generators are developed, with today’s electronics; it’s possible to generate several Kilovolt pulses with very short duration, every generator has many specifications and its use depends on the kind of application, these generators also differ in circuit design and switch type, also the effectiveness of a pulsed generator depends on its ability to control the different parameters of the pulses (Amplitude, pulse duration, frequency …).

Marx generator is a unique circuit intended for voltage multiplication, its functioning is based on charging capacitors in parallel and discharging them in series into the treatment chamber.

The purpose of the STSM was the realization of a Marx generator with negative pulses (four stages), the circuit design is based on IGBTs, because the IGBTs enable fast switching and therefore a possibility to obtain very short duration pulses.

The Marx generator realized during this mission, is able to deliver high pluses up to 3.6 KV, and 30µs pulse width, and it can be used for electroporation in food processing.

The work done represents a considerable advance; the next step will be to optimize the generator to obtain pulses ranging up to 10 KV, this can be achieved with the addition of other stages, or with using components capable of supporting higher voltage.

Poster presentation(s) originating from this mission

Event 1st World Congress on Electroporation and Pulsed Electric Fields in Biology, Medicine and Food & Environmental Technologies
Location Portorož/Slovenia
Period

06/09 - 10/09/2015

Authors Mohammed Hamza Bermaki, Abdelkader Semmak, Matej Reberšek, Yassine Bellebna, Damijan Miklavčič, Amar Tilmatine
Title Development of a Marx-type PEF generator using IGBT switches

 


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