Single-switch parallel power factor correction AC-DC converters with inherent load current feedback

Single-stage power factor correction (PFC) ac-dc converters usually suffer from high bulk capacitor voltage stress and extra switch current stress. Bulk capacitor voltage feedback with a coupled-winding structure can dramatically alleviate the stresses. However, this type of feedback is indirect because the feedback only occurs after the bulk capacitor voltage increases. This paper presents a family of single-switch single-stage parallel PFC ac-dc converters with inherent load current feedback. Unlike the bulk capacitor voltage feedback, which utilizes the decreased duty ratio and the increased bulk capacitor voltage to reduce the input power at light load, the load current feedback can reduce the input power automatically at light load while maintaining an unchanged duty ratio. The proposed converters combine the advantages of simple topology, low bulk capacitor voltage, and no extra current stress across the switch. The concept is verified using an ac-dc converter with universal-line input and 5-V, 60-W output power. The input current harmonics meet IEC1000-3-2 Class D requirements.

[1]  M.M. Hernando,et al.  Design of an AC-to-DC converter based on a flyback converter with active input current shaper , 1999, APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285).

[2]  Fred C. Lee,et al.  A novel single-phase power factor correction scheme , 1993, Proceedings Eighth Annual Applied Power Electronics Conference and Exposition,.

[3]  Yoshinori Kobayashi,et al.  The suppressing harmonic currents, MS (magnetic-switch) power supply , 1995, Proceedings of INTELEC 95. 17th International Telecommunications Energy Conference.

[4]  Esam H. Ismail,et al.  Integrated high quality rectifier-regulators , 1992, PESC '92 Record. 23rd Annual IEEE Power Electronics Specialists Conference.

[5]  R. Redl,et al.  Design considerations for single-stage isolated power-factor-corrected power supplies with fast regulation of the output voltage , 1995, Proceedings of 1995 IEEE Applied Power Electronics Conference and Exposition - APEC'95.

[6]  Oscar Garcia,et al.  Simple AC/DC converters to meet IEC 1000-3-2 , 2000, APEC 2000. Fifteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.00CH37058).

[7]  Milan M. Jovanovic,et al.  Comparison between CCM single-stage and two-stage boost PFC converters , 1999, APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285).

[8]  M. J. Willers,et al.  A BIFRED converter with a wide load range , 1994, Proceedings of IECON'94 - 20th Annual Conference of IEEE Industrial Electronics.

[9]  Milan M. Jovanovic,et al.  Reduction of voltage stress in integrated high-quality rectifier-regulators by variable-frequency control , 1994, Proceedings of 1994 IEEE Applied Power Electronics Conference and Exposition - ASPEC'94.

[10]  R. Redl.  An economical single-phase passive power-factor-corrected rectifier: topology, operation, extensions, and design for compliance , 1998, APEC '98 Thirteenth Annual Applied Power Electronics Conference and Exposition.

[11]  Fred C. Lee,et al.  Voltage and current stress reduction in single-stage power factor correction AC/DC converters with bulk capacitor voltage feedback , 2002 .

[12]  Fred C. Lee,et al.  Design optimization of an off-line input harmonic current corrected flyback converter , 1999, APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285).

[13]  Praveen Jain,et al.  A single-stage power-factor-corrected AC/DC converter , 1999 .

[14]  Milan M. Jovanovic,et al.  Single-stage, single-switch, isolated power supply technique with input-current shaping and fast output-voltage regulation for universal input-voltage-range applications , 1997, Proceedings of APEC 97 - Applied Power Electronics Conference.

[15]  E. Rodriguez,et al.  An efficient single-switch voltage regulator , 2000, 2000 IEEE 31st Annual Power Electronics Specialists Conference. Conference Proceedings (Cat. No.00CH37018).

[16]  R. Redl,et al.  A new family of single-stage isolated power-factor correctors with fast regulation of the output voltage , 1994, Proceedings of 1994 Power Electronics Specialist Conference - PESC'94.

[17]  Fu-Sheng Tsai,et al.  Off-line flyback converter with input harmonic current correction , 1996, Proceedings of Intelec'96 - International Telecommunications Energy Conference.

[18]  Milan M. Jovanovic,et al.  Single-stage input-current-shaping technique with voltage-doubler-rectifier front end , 2001 .

[19]  Fred C. Lee,et al.  Single-stage single-switch power-factor-correction AC/DC converters with DC-bus voltage feedback for universal line applications , 1998 .

[20]  Jinrong Qian,et al.  A high-efficiency single-stage single-switch high-power-factor AC/DC converter with universal input , 1998 .

[21]  Keyue Smedley,et al.  A topology survey of single-stage power factor corrector with a boost type input-current-shaper , 2000, APEC 2000. Fifteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.00CH37058).