A SINGLE-ENDED BOOST-TYPE HIGH-POWER-FACTOR CONVERTER USING A 2-INPUT-WINDING TRANSFORMER

The designed converter has a two-input-winding transformer powered by single-phase AC voltage and an energy storage capacitor. Small size an d enhanced conversion efficiency are achieved, because more than half of the energy is supplied to the load via a single conversion stage, a nd fast output-voltage regulation is achieved by controlling the charg ing and discharging of the storage capacitor. The design and control m ethods for the converter take into account the reset conditions of the transformer and stability in the output voltage control. An almost un ity power factor and a low output voltage ripple were achieved with th is converter fabricated as a breadboard circuit using small capacitors .