Predictive digital control of power factor preregulators using disturbance observer for input voltage estimation

The paper present a fully digital control of single-phase boost power factor preregulators (PFPs) based on inductor (or switch) current and output voltage measurements. Input voltage sensing is avoided using a disturbance observer, which provides a waveform proportional to the rectified input voltage. The proposed solution is based on a multiloop structure for PFP with an internal deadbeat current control and an outer voltage control with fast dynamic response. The resulting control algorithm is simple, accurate and robust respect to parameter mismatch. The digital control has been implemented both in a field programmable gate array (FPGA) and in a DSP (TMS320F2812), so as to test the proposed algorithm with different control delays. Experimental results on a single-phase 500 W boost PFP show the effectiveness of the proposed solution.

[1]  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..

[2]  Simone Buso,et al.  Simple digital control improving dynamic performance of power factor preregulators , 1997 .

[3]  George C. Verghese,et al.  An adaptive digital controller for a unity power factor converter , 1996 .

[4]  Ying-Yu Tzou,et al.  Digital control of a single-stage single-switch flyback PFC AC/DC converter with fast dynamic response , 2001, 2001 IEEE 32nd Annual Power Electronics Specialists Conference (IEEE Cat. No.01CH37230).

[5]  Donald Grahame Holmes,et al.  Implementation of a direct digital predictive current controller for single and three phase voltage source inverters , 1996, IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting.

[6]  P. Zumel,et al.  Concurrent and simple digital controller of an AC/DC converter with power factor correction , 2002, APEC. Seventeenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.02CH37335).

[7]  Aleksandar Prodic,et al.  High-frequency digital controller IC for DC/DC converters , 2002, APEC. Seventeenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.02CH37335).

[8]  M. Fu,et al.  A DSP based controller for power factor correction (PFC) in a rectifier circuit , 2001, APEC 2001. Sixteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.01CH37181).

[9]  Seth R. Sanders,et al.  Architecture and IC implementation of a digital VRM controller , 2003 .

[10]  Aleksandar Prodic,et al.  Digitally controlled low-harmonic rectifier having fast dynamic responses , 2002, APEC. Seventeenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.02CH37335).

[11]  D. Maksimovic,et al.  Dead-zone digital controller for improved dynamic response of power factor preregulators , 2003, Eighteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2003. APEC '03..

[12]  Seth R. Sanders,et al.  Architecture and IC implementation of a digital VRM controller , 2001, 2001 IEEE 32nd Annual Power Electronics Specialists Conference (IEEE Cat. No.01CH37230).

[13]  Aleksandar Prodic,et al.  Design and implementation of a digital PWM controller for a high-frequency switching DC-DC power converter , 2001, IECON'01. 27th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.37243).

[14]  Y. Ito,et al.  Microprocessor based robust digital control for UPS with three-phase PWM inverter , 1995 .