Nonlinear-carrier control for high-power-factor boost rectifiers

Novel nonlinear-carrier (NLC) controllers are proposed for high-power-factor boost rectifiers. In the NLC controllers, the switch duty ratio is determined by comparing a signal derived from the main switch current with a periodic, nonlinear carrier waveform. As a result, the average input current follows the input line voltage. The technique is suitable for boost converters operating in the continuous conduction mode. Input voltage sensing, the error amplifier in the current-shaping loop, and the multiplier/divider circuitry in the voltage feedback loop are eliminated. The current-shaping is based on switch (as opposed to inductor) current sensing. The NLC controllers offer comparable or improved performance over existing schemes, and are well suited for simple integrated-circuit implementation. Experimental verification on a 240 W rectifier is described.

[1]  Francisc C. Schwarz,et al.  An improved method of resonant current pulse modulation for power converters , 1976, 1975 IEEE Power Electronics Specialists Conference.

[2]  F. C. Lee,et al.  Charge control: modeling, analysis and design , 1992 .

[3]  Robert W. Erickson,et al.  Universal-input, high-power-factor, boost doubler rectifiers , 1995, Proceedings of 1995 IEEE Applied Power Electronics Conference and Exposition - APEC'95.

[4]  K.M. Smedley,et al.  One-cycle control of switching converters , 1991, PESC '91 Record 22nd Annual IEEE Power Electronics Specialists Conference.

[5]  S. Singer.  The application of 'loss-free resistors' in power processing circuits , 1989, 20th Annual IEEE Power Electronics Specialists Conference.

[6]  S. Singer,et al.  Design of a simple high-power-factor rectifier based on the flyback converter , 1990, Fifth Annual Proceedings on Applied Power Electronics Conference and Exposition.

[7]  Stephen D. Freeland,et al.  I. A unified analysis of converters with resonant switches. II. Input-current shaping for single-phase AC-DC power converters , 1988 .

[8]  J.A. O'Connor,et al.  Analysis and design of a zero voltage transition power factor correction circuit , 1994, Proceedings of 1994 IEEE Applied Power Electronics Conference and Exposition - ASPEC'94.