Bipolar Narrow-Pulse Generator With Energy-Recovery Feature for Liquid-Food Sterilization

Tseng, S.-Y.; Wu, Tsai‐Fu; Wu, M.-W.

doi:10.1109/tie.2007.896047

Cited by 19 publications

(8 citation statements)

References 19 publications

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“…Pulsed Electric Field treatment (PEF) has a greater potential for inactivating viable pathogens present in liquid food products through electroporation [1][2][3][4]. The electric field can be applied in the form of ultra short high voltage pulses (20 kV/cm to 80 kV/cm) to liquid food present in PEF treatment chamber accompanying two electrodes.…”

Section: Introductionmentioning

confidence: 99%

High Voltage Pulsed Electric Field Application Using Titanium Electrodes for Bacterial Inactivation in Unpurified Water

2019

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Pulsed Electric Field (PEF) treatment is considered as nonthermal due to application of ultra short high voltage pulses in liquid foods to extend their shelf life. In today's world, water decontamination becomes extremely necessar y to safeguard people from health ailments. The objective of this work focusses on inactivation of naturally prevailing Escherichia coli and Fecal coliform bacteria in environmental water using titanium electrodes. In this study, the PEF treatment chamber was designed to be used for both static and continuous modes of treatment. Bipolar square wave pulses having 1 μs pulse width at a rise time of 160 ns and pulse repetition frequency between 48 to 50 Hz were used in this research. From the results, it was observed that titanium effectively inactivated both the microorganisms at a minimum treatment time of 60 seconds at 33.9℃ while conventional stainless steel required 120 seconds at a temperature of 40.1℃ under the same experimental conditions. Also, the relationship between treatment time and temperature remained linear despite the change in electric field. Results confirmed that (i) Titanium is more suitable in PEF for water decontamination due to its high reactivity than stainless steel (ii) Using titanium, complete ABSENCE of the two microorganisms could be possible in water at a nominal field strength of 24 kV/cm with much less temperature requirement.

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Section: Introductionmentioning

confidence: 99%

High Voltage Pulsed Electric Field Application Using Titanium Electrodes for Bacterial Inactivation in Unpurified Water

2019

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“…Based on the characteristics of liquid foods, the most effective state for the inactivation of microbial in liquid foods [15] is when the voltage is in the range of ±6 kV to ±20 kV, repetitive pulse rate (frequency) in the range of 0.1 to 100 Hz and pulse width in the range of nanosecond to microsecond.…”

Section: Circuit Descriptionmentioning

confidence: 99%

Cascaded H-bridge multilevel inverter based pulsed power supply for liquid food sterilization

Jambari¹,

Azli²,

Piah³

2010

2010 4th International Power Engineering and Optimization Conference (PEOCO)

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This paper proposes a Cascaded H-bridge MultilevelInverter (CHMI) based pulsed power supply for the sterilization of liquid foods using Pulsed Electric Field (PEF). The utilization of a CHMI allows the system to reach high voltage without the use of transformers while fulfilling the pulse requirements for effective liquid food sterilization. By using the CHMI topology, no extra clamping diodes or voltage balancing capacitor is needed. In this work, the proposed CHMI circuit operation is simulated using MATLAB/Simulink where unipolar and bipolar square wave pulses with pulse width range of 1 µs to 1 ms are generated. A peak output voltage of 6 kV and peak output power of 3.6 kW have been obtained with both values meeting the pulse specifications for liquid food sterilization applications.

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“…(1)(2)(3)(4)(5)(6) To overcome the above disadvantages, zeta converters with soft-switching techniques to reduce power losses and EMI noise have been proposed. (7)(8)(9)(10)(11)(12) The soft-switching techniques can be divided into four techniques: zero-voltage switching (ZVS), zero-current switching (ZCS), zero-voltage transition (ZVT), and zero-current transition (ZCT). Among the four techniques, the ZVT technique has the simplest structure and easiest implementation for applications of low-or medium-power converters.…”

Section: Introductionmentioning

confidence: 99%

Zeta Converter with Resistor-capacitor-diode Snubber and H-type Snubber to Reduce Switching and Reverse-recovery Losses

Tsai¹,

Chen²

2021

Sensors and Materials

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In this paper, a zeta converter with a resistor-capacitor-diode (RCD) snubber and an H-type snubber to reduce switching and reverse-recovery losses is proposed. The proposed converter has the following advantages: (1) By incorporating an RCD snubber, the power switch can achieve a zero-voltage transition (ZVT) to reduce the switching losses of the power switch. (2) By incorporating an H-type snubber, the reverse-recovery losses of the power diode can be reduced. Therefore, the overall efficiency of the proposed converter is increased significantly. Finally, a prototype zeta converter with an RCD and an H-type snubber to reduce the switching losses of the power switch and the reverse-recovery losses of the power diode is built. Experimental results verify that the proposed zeta converter is relatively suitable for the requirements of a low or medium power.

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Bipolar Narrow-Pulse Generator With Energy-Recovery Feature for Liquid-Food Sterilization

Cited by 19 publications

References 19 publications

High Voltage Pulsed Electric Field Application Using Titanium Electrodes for Bacterial Inactivation in Unpurified Water

High Voltage Pulsed Electric Field Application Using Titanium Electrodes for Bacterial Inactivation in Unpurified Water

Cascaded H-bridge multilevel inverter based pulsed power supply for liquid food sterilization

Zeta Converter with Resistor-capacitor-diode Snubber and H-type Snubber to Reduce Switching and Reverse-recovery Losses

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