A High Power Factor Switched Mode Power Supplied using Full-Bridge Converter

Abstract

In this era due to Power electronics revolution, people have very efficient tools to solve problems of having DC voltage to power the Electronics Devices. Every new electronic product requires converting input voltage 230V AC power to some fixed DC voltage for powering the electronics circuit or devices. Switching regulators (SMPS) are becoming an essential part of many electronic systems due to miniaturization and energy efficiency. Conventional power supplies, however, draw currents that are highly non-sinusoidal and out of phase with input voltage, thus display a low power factor and higher total harmonic distortion (THD), which causes power quality problems. In This work presents two stage AC-DC and DC-DC power converter using single-phase isolated Full bridge converter with inherent power factor correction (PFC) method for switched mode power supply (SMPS).The advantages of the proposed methodology are its simple control strategy, reduction in complexity of system, low input line current harmonics. The effect of load variation on SMPS is also studied in order to demonstrate the effectiveness of converter for the complete range of load conditions.