A small signal model for average current mode control based on describing function approach

Author

Yu, Feng ; Lee, Fred C. ; Mattavelli, Paolo

Author_Institution

Bradley Dept. of Electr. & Comput. Eng., Virginia Tech, Blacksburg, VA, USA

fYear

2011

fDate

17-22 Sept. 2011

Firstpage

405

Lastpage

412

Abstract

A small signal model for average current mode control based on describing function method is proposed. Modeling of average current mode control is more complicated than peak current mode control due to the additional current compensator. In this paper, two commonly used current compensators are considered as examples. The structure of average current mode control is compared with V² control to find the similarity. Previous modeling result about V² control is borrowed and modified for average current mode control. The proposed small signal model can be accurate up to switching frequency. The proposed model is verified using Simplis simulation and measurement.

Keywords

current-mode circuits; describing functions; electric current control; average current mode control; current compensators; describing function method; small signal model; Capacitors; Frequency control; Inductors; Mathematical model; Time domain analysis; Transfer functions; Voltage control; Average current mode control; V² control; describing function method;

fLanguage

English

Publisher

ieee

Conference_Titel

Energy Conversion Congress and Exposition (ECCE), 2011 IEEE

Conference_Location

Phoenix, AZ

Print_ISBN

978-1-4577-0542-7

Type

conf

DOI

10.1109/ECCE.2011.6063798

Filename

6063798