Digital voltage control of boost CRM PFC AC/DC converters with TRIAC Phase Control dimmer

This paper presents a digital voltage control scheme for boost critical conduction mode (CRM) power-factor-correction (PFC) AC/DC converters with TRIAC phase control dimmer to use in the lighting equipment ex. LED or fluorescent lamp. The TRIAC is a standard type of dimmer and work fine with resistive load such as ordinary Tungsten filament light bulb (incandescent lamp), however, for non-resistive lighting sources, a well-designed AC-DC converter must be designed to provide good power quality as well as wide linear non-flickering dimming control range. A variable PFC output voltage modulation method is proposed to enhance the dimming control range. The TRIAC dimmer will cause switching oscillations due to the PFC input filter, a damper circuit is designed to minimize this effect. The proposed control scheme has been verified by using simulation software PSIM in applications to a 50 W prototype of boost CRM PFC AC/DC converter with TRIAC phase control dimmer. Simulation and experimental results are given to illustrate the feasibility of the proposed control scheme.

[1]  Wing-Hung Ki,et al.  Phase-controlled dimmable electronic ballast for fluorescent lamps , 1999, 30th Annual IEEE Power Electronics Specialists Conference. Record. (Cat. No.99CH36321).

[2]  Ying-Yu Tzou,et al.  Design and implementation of an FPGA-based control IC for AC-voltage regulation , 1999 .

[3]  D. G. Lamar,et al.  A Unity Power Factor Correction Preregulator With Fast Dynamic Response Based on a Low-Cost Microcontroller , 2008, IEEE Transactions on Power Electronics.

[4]  B. Lehman,et al.  Issues, Models and Solutions for Triac Modulated Phase Dimming of LED Lamps , 2007, 2007 IEEE Power Electronics Specialists Conference.

[5]  R. Ridley,et al.  Average small-signal analysis of boost power factor correction circuit , 1989 .

[6]  Ying-Yu Tzou,et al.  Fast response control of a boost PFC converter , 2003, The Fifth International Conference on Power Electronics and Drive Systems, 2003. PEDS 2003..

[7]  I. Batarseh,et al.  Small-signal modeling of a single-switch AC/DC power factor correction circuit , 1998 .

[8]  Jian Sun,et al.  On the Zero-Crossing Distortion in Single-Phase PFC Converters , 2004 .

[9]  Prasad Enjeti,et al.  Control of multiple single phase PFC modules with a single low-cost DSP , 2003 .

[10]  F. C. Lee,et al.  A critical-conduction-mode single-stage power-factor-correction electronic ballast , 2000, APEC 2000. Fifteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.00CH37058).