Small-signal modeling of average current-mode control

Author

Tang, Wei ; Lee, Fred C. ; Ridley, Raymond B.

Author_Institution

Dept. of Electr. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA

Volume

8

Issue

2

fYear

1993

fDate

4/1/1993 12:00:00 AM

Firstpage

112

Lastpage

119

Abstract

A recently proposed average current-mode control method is analyzed. A complete small-signal model for the control scheme is developed. The model is accurate up to half the switching frequency. This control scheme is suitable for applications where the average inductor current needs to be controlled, as in power factor correction circuits and battery charger dischargers. The subharmonic oscillation, commonly found in peak current-mode control, also exists in this method. This subharmonic oscillation can be eliminated by properly choosing the proper gain of the compensation network in the current loop. Model predictions are confirmed experimentally

Keywords

electric current control; power convertors; average current-mode control; average inductor current; battery charger; battery dischargers; gain; power converters; power factor correction circuits; small-signal model; subharmonic oscillation; Batteries; Circuits; Inductors; Power factor correction; Predictive models; Pulse width modulation; Sampling methods; Switches; Switching frequency; Voltage control;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/63.223961

Filename

223961