Algorithms to overcome time delay in digital peak current control

Author

Zhou, Guohua ; Xu, Jianping ; He, Mingzhi ; Chen, Ni

Author_Institution

Sch. of Electr. Eng., Southwest Jiaotong Univ., Chengdu

fYear

2008

fDate

21-24 April 2008

Firstpage

1

Lastpage

5

Abstract

Constant-frequency and variable-frequency digital peak current control techniques are introduced in this paper. To overcome time delay problem of previous digital peak current (DPC) control in constant switch frequency, two new algorithms are proposed and studied. One is an improved digital peak current (IDPC) control algorithm in constant switch frequency and the other is a variable-frequency digital peak current (VF- DPC) control algorithm. The control laws of the proposed digital algorithms are discussed and compared. Small-signal analysis is also performed to study the effect of the time delay. Transient simulation results are given to further verify the analysis results.

Keywords

DC-DC power convertors; delays; digital control; electric current control; switching convertors; DC-DC power converters; constant switch frequency; improved digital peak current control; sall-signal analysis; tansient simulation; time delays; Buck converters; Current control; Delay effects; Digital control; Frequency; Inductors; Pulse width modulation; Resistors; Switches; Virtual colonoscopy;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Technology, 2008. ICIT 2008. IEEE International Conference on

Conference_Location

Chengdu

Print_ISBN

978-1-4244-1705-6

Electronic_ISBN

978-1-4244-1706-3

Type

conf

DOI

10.1109/ICIT.2008.4608596

Filename

4608596