A new approach to averaged modeling of PWM converters with current-mode control

Author

Sun, Jian ; Bass, Richard M.

Author_Institution

Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA

Volume

2

fYear

1997

fDate

9-14 Nov 1997

Firstpage

599

Abstract

A new approach to averaged modeling of PWM DC/DC converters with current-mode control is presented in this paper. The method is based on closed-form ripple functions obtained by applying the KBM (Krylov-Bogoliubov-Mitropolsky) algorithm. It overcomes the limitations of conventional methods based on geometrical calculations of the inductor current waveform. Application of the method is demonstrated by using a boost converter, and the derived model is compared with conventional ones and validated by detailed switching model simulation. The KBM algorithm has been implemented in a public-domain symbolic analysis program package so that the application of the new method can be fully automated

Keywords

DC-DC power convertors; PWM power convertors; electric current control; inductors; power engineering computing; switching circuits; symbol manipulation; KBM algorithm; Krylov-Bogoliubov-Mitropolsky algorithm; PWM DC/DC converters; PWM converters; averaged modeling; boost converter; closed-form ripple functions; current-mode control; detailed switching model simulation; geometrical calculations; inductor current waveform; public-domain symbolic analysis program package; Automatic control; Current control; DC-DC power converters; Electric variables control; Inductors; Packaging; Power system modeling; Pulse width modulation; Pulse width modulation converters; Switches;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics, Control and Instrumentation, 1997. IECON 97. 23rd International Conference on

Conference_Location

New Orleans, LA

Print_ISBN

0-7803-3932-0

Type

conf

DOI

10.1109/IECON.1997.671801

Filename

671801