A Digital Parallel Current-Mode Control Algorithm for DC–DC Converters

Author

Wei Fang ; Xiao-dong Liu ; Su-cheng Liu ; Yan-Fei Liu

Author_Institution

Key Lab. of Power Electron. & Motion Control, Anhui Univ. of Technol., Maanshan, China

Volume

10

Issue

4

fYear

2014

fDate

Nov. 2014

Firstpage

2146

Lastpage

2153

Abstract

This paper presents a novel digital current-mode control strategy for dc-dc converters. In the proposed algorithm, the required duty cycle is calculated directly by two parallel terms. With some simple operations in digital implementation, the resultant control system achieves rapid and precise output voltage regulation under the input voltage and output load change. Moreover, the implementation of the proposed algorithm with a digital controller is discussed in detail. Analysis shows that the parallel current-mode control does not exhibit subharmonic oscillation. A 400-kHz switching frequency buck converter based on field-programmable gate array implementation is built to verify the feasibility and advantages of the parallel current-mode control.

Keywords

DC-DC power convertors; current-mode circuits; digital control; field programmable gate arrays; switching convertors; voltage control; dc-dc converters; digital controller; digital current-mode control strategy; digital implementation; duty cycle; field-programmable gate array implementation; frequency 400 kHz; output voltage regulation; parallel current-mode control; switching frequency buck converter; Algorithm design and analysis; DC-DC power converters; Digital control; Field programmable gate arrays; Stability analysis; Voltage control; DC???DC power conversion; digital control; dynamic response;

fLanguage

English

Journal_Title

Industrial Informatics, IEEE Transactions on

Publisher

ieee

ISSN

1551-3203

Type

jour

DOI

10.1109/TII.2014.2358455

Filename

6899661