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This paper presents a high pulsed electric field generator for microbial inhibition of liquid food in continuous treatment applications. The proposed pulsed electric field generator adopts forward/flyback hybrid converters to achieve a bidirectional narrow pulse voltage output. With this circuit structure, the proposed one can reduce voltage stresses of output diodes and switches in secondary winding...
This paper presents a narrow pulsed voltage generator along with an ultrasound generator for liquid food sterilization. The generator is derived from a bidirectional flyback converter with leakage energy recovery circuits, which can improve efficiency about 12%. In addition, the proposed generator is associated with a half-bridge inverter for generating ultrasound to clean sterilizer electrodes. In...
This paper presents a soft switching single-stage converter with a buck-boost type of power factor corrector (PFC) based on an asymmetrical half-bridge topology. The proposed converter is formed from a buck-boost PFC and an asymmetrical half-bridge converter. The converter has the features of constant frequency operation, soft switching and low voltage stress imposed on the active switches. Moreover,...
This paper proposes a wide pulse combined with narrow pulse generator for solid food sterilization. The proposed generator is composed of a full-bridge converter in phase-shift control to generate high dc-link voltage, and a full-bridge inverter associated with an L-C network and a transformer to generate wide pulses combined with narrow pulses. These combined pulses can prevent undesired strong air...
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