Bridgeless PFC Rectifier for Single Stage Resonant Converter with Closed Loop and Improved Dynamic Response

Power factor correction is an important phenomenon to improve the power quality on the grid connected systems. Power factor correction is predominant to comply with the harmonic standard IEC 1000-3-2. A single stage resonant converter with bridgeless PFC rectifier is proposed. The resonant converter is operated at high frequency by using a LC tank circuit to control the switching frequency. The proposed resonant converter along with voltage doubler and cascaded filter connected to the circuit will increase the output. The output power and output voltage is increased, power factor is improved, ripple voltage is decreased and reduced production cost due to the less number of switches. To achieve power factor correction with high frequency isolation and regulate constant output voltage at high line voltage with reduced number of switches, bridgeless single stage topology is proposed along with a closed loop and improved dynamic response.