Title :
A parallel-connected single phase power factor correction approach with improved efficiency
Author :
Kim, Sangsun ; Enjeti, Prasad N.
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
Abstract :
In this paper, a new parallel-connected single phase power factor correction (PFC) topology using two flyback converters is proposed to improve the output voltage regulation with simultaneous input power factor correction and control. This approach offers lower cost and higher efficiency by parallel processing of the total power. Flyback converter-I primarily regulates output voltage with fast dynamic response and processes 55% of the power. Flyback converter-II with AC/DC PFC stage regulates input current shaping and PFC, and processes the remaining 45% of the power. This paper presents a design example and circuit analysis for 200 W power supply. A parallel-connected interleaved structure offers smaller passive components, less losses even in continuous conduction inductor current modes, and reduced volt-ampere rating of DC/DC stage converter. TI-DSP, TMS320LF2407, is used for implementation. Simulation and experimental results show the performance improvement
Keywords :
AC-DC power convertors; DC-DC power convertors; electric current control; power factor correction; voltage control; AC/DC PFC stage; DC/DC stage converter; TMS320LF2407 DSP; continuous conduction inductor current modes; efficiency improvement; fast dynamic response; flyback converters; input current shaping regulation; input power factor correction; output voltage regulation improvement; parallel-connected single phase power factor correction; power factor control; reduced volt-ampere rating; Analog-digital conversion; Circuit analysis; Circuit simulation; Costs; Inductors; Parallel processing; Power factor correction; Power supplies; Topology; Voltage control;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2002. APEC 2002. Seventeenth Annual IEEE
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-7404-5
DOI :
10.1109/APEC.2002.989257
