A Single-Phase Boost Rectifier System for Wide Range of Load Variations

Converters operated in discontinuous-conduction-mode (DCM) and in continuous-conduction-mode (CCM) are suitable for lighter and higher loads, respectively. A new, constant switching frequency based single-phase rectifier system is proposed, which operates in DCM and in CCM for outputs less than and greater than 50% rated load, respectively, covering a wide range of load variation. The power circuit and the control circuit of the proposed rectifier are easily configurable for DCM and CCM operations. The measured load current is used to select the desired operating mode. The peak device current under DCM is limited to rated device current under CCM without using a device of higher current rating. The input current shaping under CCM and DCM are based on the comparison of measured input current with linear and nonlinear carriers, respectively. A load current feedforward scheme is presented to improve the system dynamic performance and also to ensure a smooth transition between the two operating modes. All the necessary control operations are performed without using multiplication, division and square-root operation. The proposed rectifier shows improved input current characteristics over the existing CCM converters for the above load range. This is validated on a 600-W rectifier prototype. Simulation and experimental results are presented

[1]  G. K. Dubey,et al.  Mixed-mode operation of boost switch-mode rectifier for wide range of load variations , 2002 .

[2]  G. Narayanan,et al.  Input voltage sensorless average current control technique for high-power-factor boost rectifiers operated in discontinuous conduction mode , 2005, Twentieth Annual IEEE Applied Power Electronics Conference and Exposition, 2005. APEC 2005..

[3]  K. M. Smedley,et al.  Time quantity one-cycle control for power-factor correctors , 1997 .

[4]  J.A. Melkebeek,et al.  Sample correction for digitally controlled boost PFC converters operating in both CCM and DCM , 2003, Eighteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2003. APEC '03..

[5]  Dragan Maksimovic,et al.  Nonlinear-carrier control for high-power-factor rectifiers based on up-down switching converters , 1998 .

[6]  V. Grigore,et al.  Input filter design for power factor correction converters operating in discontinuous conduction mode , 1999, 1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261).

[7]  K. M. Smedley,et al.  A family of continuous-conduction-mode power-factor-correction controllers based on the general pulse-width modulator , 1998 .

[8]  Robert W. Erickson,et al.  Nonlinear-carrier control for high power factor boost rectifiers , 1995, Proceedings of 1995 IEEE Applied Power Electronics Conference and Exposition - APEC'95.

[9]  J. Sebastian,et al.  An overview of power factor correction in single-phase off-line power supply systems , 1994, Proceedings of IECON'94 - 20th Annual Conference of IEEE Industrial Electronics.

[10]  Chongming Qiao,et al.  An improved integration-reset controlled single phase unity-power-factor boost rectifier with lower distortion , 1999, IECON'99. Conference Proceedings. 25th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.99CH37029).

[11]  Robert W. Erickson,et al.  Fundamentals of Power Electronics , 2001 .

[12]  A. Pugh.  The art of electronics. 2nd edn: By Paul Horowitz and Winfield Hill. Pp. 1125. Cambridge University Presss. 1989. £29.95, US$49.50 , 1990 .