Single-phase half-bridge rectifier with power factor correction

2004 ◽  
Vol 151 (4) ◽  
pp. 443 ◽  
Author(s):  
B.R. Lin ◽  
T.Y. Yang
Keyword(s):  
Power Factor ◽  
Single Phase ◽  
Power Factor Correction ◽  
Bridge Rectifier

scholarly journals Single Phase AC to DC Isolated ZETA Power Factor Correction Converter fed LED drives

2020 ◽  
pp. 73-80
Author(s):  
S. T. Siddharthan ◽  
Andrew Jones ◽  
S. Kathikeyan
Keyword(s):  
Power Factor ◽  
High Frequency ◽  
Single Phase ◽  
Power Factor Correction ◽  
Harmonic Distortion ◽  
Supply System ◽  
Unity Power Factor ◽  
Current Harmonic ◽  
High Frequency Transformer ◽  
Bridge Rectifier

This paper deals with PFC-isolated Zeta converter fed LED drive to overcome the power factor problems. The proposed circuit topology consists of diode bridge rectifier and isolated Zeta converter with high frequency transformer. A single –phase supply is used to feed a DBR followed by a filter to avoid any switching ripple in DBR and the supply system. An isolated Zeta converter is operated to work under DCM mode. This combination of DBR and PFC converter is used to feed a LED drive. This converter is simulated in MATLAB platform. This converter provides better results such as unity power factor and less current harmonic distortion.

A Single-Phase AC/DC Conversion Circuit with APFC

2015 ◽  
Vol 740 ◽  
pp. 490-494
Author(s):  
Wei Chen ◽  
Ze Sen Shi ◽  
Yi Li Zhou ◽  
Qiang Chang ◽  
Wei Ping Wang
Keyword(s):  
Power Factor ◽  
Single Phase ◽  
Closed Loop ◽  
Power Factor Correction ◽  
Duty Ratio ◽  
Current Output ◽  
Bridge Rectifier ◽  
Current Value ◽  
Small Voltage ◽  
Circuit Power

This system uses the MSP430F6638 and FPGA as the core, includes full bridge rectifier circuit, power factor correction circuit, Boost/Buck circuit and sample circuit. According to the sampling voltage and current value, The FPGA adjusts PWM wave duty ratio of power factor correction chip UC3854, completing single phase AC/DC conversion circuit with a voltage outer closed-loop and current inner closed-loop and active power factor correction (APFC). Test shows that the output voltage can stable in a setting value, with amplitude range ±0.05V, and when load’s impedance changes, this circuit can keep a small voltage adjustment rate and load adjustment rate. We use electronic parameter measurement device to measure the efficiency of AC/DC converter in a specified condition (voltage input Us=24V, current output Io=2A, voltage output Uo=36V), result demonstrates it’s a relatively ideal value. At the same time, under the control of UC3854, the power factor of alternating current input is 0.9734.And when we set the range of power factor between 0.8~1.0, The circuit can automatically adjust the power factor to track the set value.

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