Low THD variable load buck PFC converter

International standards impose several constraints concerning the electric power quality and require that the harmonic content of the line current of grid connected equipment is below assigned limits; for this reason operating of ac-dc converters with high power factor and low line current distortion has become essential. In this paper a single phase buck type PFC converter based on discontinuous capacitor voltage mode is presented for grid connected 1 kW-48 Vdc applications. With proper design, low total harmonic distortion and power factor close to unity over a wide load range are easily achieved by means of the proposed buck PFC converter. Good results for the proposed PFC are achieved when combined operating conditions are provided, discontinuous capacitor voltage mode for input capacitor and discontinuous inductor current mode for output inductor.

[1]  J. Cardesin,et al.  Average small-signal model of buck converter used as power factor preregulator , 2002, Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344).

[2]  藪崎 純.  Power factor correction switching power supply , 2009 .

[3]  V. Grigore,et al.  High power factor rectifier based on buck converter operating in discontinuous capacitor voltage mode , 2000 .

[4]  Pedro José Villegas,et al.  Helpful hints to select a power-factor-correction solution for low- and medium-power single-phase power supplies , 2005, IEEE Transactions on Industrial Electronics.

[5]  Jiann-Fuh Chen,et al.  Analysis and design of a single-phase AC/DC step-down converter for universal input voltage , 2007 .

[6]  H. Endo,et al.  A high-power-factor buck converter , 1992, PESC '92 Record. 23rd Annual IEEE Power Electronics Specialists Conference.

[7]  Frede Blaabjerg,et al.  Current programmed control of a single-phase two-switch buck-boost power factor correction circuit , 2006, IEEE Transactions on Industrial Electronics.

[8]  Yie-Tone Chen,et al.  A procedure for designing EMI filters for AC line applications , 1996 .

[9]  Giorgio Spiazzi,et al.  Analysis of buck converters used as power factor preregulators , 1997, PESC97. Record 28th Annual IEEE Power Electronics Specialists Conference. Formerly Power Conditioning Specialists Conference 1970-71. Power Processing and Electronic Specialists Conference 1972.

[10]  Chi K. Tse,et al.  New single-stage power-factor-corrected regulators operating in discontinuous capacitor voltage mode , 1997, PESC97. Record 28th Annual IEEE Power Electronics Specialists Conference. Formerly Power Conditioning Specialists Conference 1970-71. Power Processing and Electronic Specialists Conference 1972.

[11]  Shu Yuen Ron Hui,et al.  Modeling, analysis, and application of buck converters in discontinuous-input-voltage mode operation , 1997 .

[12]  Milan M. Jovanovic,et al.  State-of-the-art, single-phase, active power-factor-correction techniques for high-power applications - an overview , 2005, IEEE Transactions on Industrial Electronics.

[13]  W. Eberle,et al.  A novel EMI filter design method for switching power supplies , 2004, IEEE Transactions on Power Electronics.

[14]  F. C. Lee,et al.  Separation of the common-mode- and differential-mode-conducted EMI noise , 1996 .