Design and Implementation of Novel Series Trigger Circuit for Xenon Flash Lamp Driver

Continuous flow pulsed light (PL) system was designed and fabricated with a residence time of 3.5 s at a flow rate of 100 ml/min to study the effect on microbial quality of the fruit juice. The circuit was designed to deliver pulse energy between 12.6 and 756 J/cm 2 with a flash lasted 360 μs at a frequency of three pulses per second. Tender coconut water, pineapple and orange juice was treated with different input voltage (500-1000 V) to the lamp, distance of the lamp exposed to the sample (5-15 cm) and treatment time (15-45 s) to reduce the population of aerobic plate count (APC), yeast and mold. Box-Behnken design (BBD) was used to optimize the PL process parameters. The process condition was optimized based on the microbial reduction rate. The optimized condition was input voltage of 1492, 1499, and 1486 V, distance of 7.6, 10.2, and 5.3 cm, and treatment time of 43 s (12 passes), 44 s (13 passes), and 45 s (13 passes) for tender coconut water, pineapple and orange juice, respectively at the target of five log reduction for APC and four log reduction for Y&M. These results recommend that a continuous flow PL system could improve the microbial safety of the fruit juice. PL is a nonthermal method for inactivating food microbes, extending food's shelf life. For industrial purposes, the batch system is virtually impossible. As a result, continuous flow systems for liquid foods can provide a better way to handle large volumes. The optimized setup was found to achieve a microbial death rate of at least 5 log CFU/ml, consistent with FDA guidelines for fruit juice. The BBD of response surface methodology helps in optimizing the process parameters such as input voltage of the lamp, distance of the PL lamp to treatment tube and treatment time. The resulting mathematical model provides the PL process conditions for designing the equipment for different fruit beverages to obtain microbiologically safe products.

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“…Duration of pulse ( T d ) is defined as 3 t which was calculated as given in the equation (Rashid et al, 2015).

T_{d} (s) = 3 t,

The voltage ( V o ) required for generating the desired pulse energy was obtained from the below equation (Song et al, 2018)

V_{o} = {((), \frac{2 E_{o}}{C})}^{0.5}

where C = capacitance of the capacitor (Farads).…”

Section: Methodsmentioning

confidence: 99%

“…The voltage (V o ) required for generating the desired pulse energy was obtained from the below equation (Song et al, 2018)…”

Section: Power Supply (Circuit)mentioning

confidence: 99%

Optimization of continuous flow pulsed light system process parameters for microbial inactivation in tender coconut water, pineapple and orange juice

Preetha

Varadharaju

Jeevarathinam

et al. 2022

J Food Process Engineering

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“…For medical laser equipment, instantaneous high power has to be drawn from source during the laser on and off transient, not consecutively constant low‐power demand. That is, conventional xenon lamp driver cannot directly be utilised to a medical laser system [27–29]. Therefore, to develop a laser driving system so as to drive xenon lamp easily and correctly is necessary.…”

Section: Introductionmentioning

confidence: 99%

Interleaving‐based converter system with features of external auxiliary triggering and universal line input for driving medical laser equipment

Shen

Chen

Shen

2019

J. eng.

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Comparative study of pulse trigger and DC trigger circuit for xenon flash lamp drivers

Song

Cho

Park

et al. 2019

IEEE Trans. Dielect. Electr. Insul.

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Design and Implementation of Novel Series Trigger Circuit for Xenon Flash Lamp Driver

Cited by 6 publications

References 15 publications

Optimization of continuous flow pulsed light system process parameters for microbial inactivation in tender coconut water, pineapple and orange juice

Optimization of continuous flow pulsed light system process parameters for microbial inactivation in tender coconut water, pineapple and orange juice

Interleaving‐based converter system with features of external auxiliary triggering and universal line input for driving medical laser equipment

Comparative study of pulse trigger and DC trigger circuit for xenon flash lamp drivers

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