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Nowadays, the white goods consumer market is very aggressive concerning energy saving, reliability and cost. In microwave ovens applications one of the most delicate part is the magnetron, in particular during start up. Usually, in Microwave oven using inverter, an expensive and complicated circuit is required, especially for proper start up. This paper proposes a novel start up control strategy for...
Nowadays, there is a high demand from the power electronics market in having systems more efficient and compact. Packaging has become one of the focus factors in power electronics. With more sophisticated products being developed today, in term of Silicon device like Power MOSFETs and IGBTs, there are higher loads and stresses being put on the packaging of these semiconductor materials. Today the...
Quasi Resonant (QR) converters are widely used as AC current generators for induction. These converters are particularly attractive because they use just one solid state switch and only one resonant capacitor to generate a variable frequency/variable amplitude current to feed the induction coil. When properly designed and matched with their load, these converters are known to operate in ZVS at turn...
The design process for home appliances is intrinsically driven by product information. The common workflow is usually pre-defined and not flexible. The most difficult part in the design of power electronic boards to be used in household appliances is abiding by the Electromagnetic Compatibility (EMC) regulations. EMC characteristics are difficult to determine in early design stages. In fact electromagnetic...
In this paper a new low cost technique for PWM strategy implementation is presented. The proposed technique does not require dedicated hardware PWM units, thus offering higher flexibility of use. Furthermore, the aforementioned method eases the digital implementation of modern modulation methods like AZSPWM, NSPWM, or ACRPWM. By using a conventional PWM unit from a microcontroller, these modern modulation...
In this paper a resonant active clamp circuit is presented, addressing the efficient optimization of a bidirectional DC\DC converter for hybrid electric vehicles applications. The converter structure is based on a combination of two dc/dc topologies connected through a high frequency transformer, a full-bridge stage modulated in phase shift for step-down operations and a current-source push-pull stage...
In this paper, a bidirectional converter for hybrid electrical vehicles addressing high efficiency and digital control is proposed. It is based on two switching converters linked through a high frequency transformer and exploits soft-switching technique and an active-clamp circuit. Operating principle, theoretical analysis and design guidelines are provided, as well as simulation and experimental...
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