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Owing to various advantages over conventional drying systems, microwave drying technology has been widely applied to vast industrial applications. During microwave drying especially in high moisture content products such as fruits and vegetables, temperature will increase dramatically since they are very responsive to microwave absorption. The characteristics of materials may change with the uncontrolled...
As clean and high energy efficient, the microwave drying system has gained popularity for a wide variety of food preservation and processing of bio-commodities. The main advantage is the acceleration of the drying process which is quite limited comparing to conventional hot air drying system. However, during microwave drying process, pressure and temperature will increase continuously and this might...
This paper presents a novel circuit topology of a high efficiency single-phase sinewave PV power conditioner. This power conditioner is composed of time-sharing sinewave absolute pulse width modulated boost chopper with a bypass diode in the first power processing stage and time-sharing sinewave pulse width modulated full-bridge inverter in the second power processing stage operated by time-sharing...
This paper introduces a power conditioner with two stages of power conversions. The first stage is the DC boost chopper with the passive auxiliary resonant snubber-assisted softswitching circuit. The second stage is the sinewave PWM inverster with the active auxiliary resonant snubber-assisted soft-switching circuit. The inverter part is made of half-bridged configuration to limit the number of the...
Because of achieving high efficiency power conversion, switching power converters are widely used. About the switching power converters, pulse width modulation (PWM) technique is used to produce switching pattern. But this scheme causes large switching noise peak components at the multiple numbers of carrier frequency. And this raises problems of clearing noise regulations. This paper proposes a novel...
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