Small-signal modeling for digital predictive current mode control in CCM

Author

Siyu He ; Nelms, R.M. ; Hung, John Y.

Author_Institution

Electr. & Comput. Eng. Dept., Auburn Univ., Auburn, AL, USA

fYear

2015

fDate

15-19 March 2015

Firstpage

2816

Lastpage

2820

Abstract

Predictive current mode control is a promising digital current mode control technique. It has the advantages of fast transient response without knowledge of the exact value of the input voltage and inductance in the power converter. Control laws are based on an understanding of the inductor current waveform, thus providing flexibility in programming and implementation. However, only a few papers have been written about developing small-signal models for predictive current controllers. It is important to have a small-signal model to optimize the controller performance. In this paper, a small-signal s-domain model for predictive current mode control is proposed. This small-signal model is applied to two different predictive controller systems. The frequency response of the systems are compared with experimental measurements obtained with an AP300 network analyzer.

Keywords

electric current control; frequency response; inductance; network analysers; power convertors; predictive control; transient response; waveform analysis; AP300 network analyzer; CCM; continuous conduction mode; digital predictive current mode control; frequency response; inductance; inductor current waveform; power converter; small-signal s-domain modeling; transient response; Delays; Frequency measurement; Inductors; Predictive models; Regulators; Switches; Voltage control; current mode; predictive control; small-signal model;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition (APEC), 2015 IEEE

Conference_Location

Charlotte, NC

Type

conf

DOI

10.1109/APEC.2015.7104749

Filename

7104749