A new control strategy to achieve sinusoidal line current in a cascade buck-boost converter

Author

Ghanem, Mohamed C. ; Al-Haddad, Kamal ; Roy, Gilles

Author_Institution

Dept. of Electr. Eng., Ecole de Technol. Superieure, Montreal, Que., Canada

Volume

43

Issue

3

fYear

1996

fDate

6/1/1996 12:00:00 AM

Firstpage

441

Lastpage

449

Abstract

This work presents a detailed theoretical analysis and experimental results of a novel means of obtaining sinusoidal input current and unity power factor (UPF) via a cascade buck-boost power converter. Using the new configuration, sinusoidal line current in phase with the bus voltage is achieved, thanks to a new and simple to implement control strategy. Comparison between the input and output voltages is used to select the instantaneous operating mode of the converter. Offline references are calculated and stored in two EPROM circuits and then compared to measured currents to generate the gating signals of the appropriate switches. Complete theoretical analysis, simulation results and experimental data on a 500 W power converter are presented, to demonstrate the superiority of the new control strategy. Low order harmonics in the input current are eliminated and the input power factor is found to be over 0.99

Keywords

DC-DC power convertors; EPROM; electric current control; harmonic distortion; power engineering computing; power factor; power system harmonics; voltage control; 500 W; bus voltage; cascade buck-boost power converter; control strategy; gating signals; instantaneous operating mode; low order harmonics; offline references; sinusoidal input current; unity power factor; Analytical models; Circuit simulation; Current measurement; EPROM; Power system harmonics; Reactive power; Signal generators; Switches; Switching circuits; Voltage control;

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/41.499817

Filename

499817