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In this paper, analysis of single-stage ac/dc converter for small-scale wind power generation system is proposed. The harmonic currents of wind generator are reduced so as to decrease the wind turbine noise. The proposed three-phase wind converter has zero-voltage switch in the active switches. Compared with a traditional two-stage converter, high efficiency and high step-up voltage ratio are also...
White light emitting diode (LED) with high brightness has attracted a lot of attention from both industry and academia for its high efficiency, ease to drive, environmental friendliness, and long lifespan. They become possible applications to replace the incandescent bulbs and fluorescent lamps in residential, industrial and commercial lighting. The realization of this new lighting source requires...
This paper presents an efficient, small-sized, and cost-effective single-switch power-factor-correction (PFC) scheme for high-frequency electronic ballasts. The circuit topology originates from the integration of a buck-boost PFC converter and class-E electronic ballast. Only one active power switch is commonly used by both power stages to save the cost of active switches and control circuits. The...
This paper presents an efficient, small-sized, and cost-effective single-switch power-factor-correction (PFC) scheme for high-frequency electronic ballasts. The circuit topology originates from the integration of a buck-boost power-factor-correction converter and a class-E electronic ballast. Only one active power switch is commonly used by both power stages to save the cost of active switches and...
A novel approach of power factor correction (PFC) with a high-frequency resonant energy tank for the DC-link inverter is proposed. As compared with the conventional PFC techniques, this approach is advantageous of lower current stress, lower switching losses, and higher control flexibility. With carefully designed circuit parameters, the proposed topology can exhibit high power factor. The adopted...
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