A systematic and unified approach to modeling PWM DC/DC converters based on the graft scheme

Author

Wu, Tsai-Fu ; Chen, Yu-Kai

Author_Institution

Dept. of Electr. Eng., Nat. Chung Cheng Univ., Chia-Yi, Taiwan

Volume

45

Issue

1

fYear

1998

fDate

2/1/1998 12:00:00 AM

Firstpage

88

Lastpage

98

Abstract

A systematic and unified approach to modeling pulsewidth modulated (PWM) DC/DC converters based on the graft scheme is presented in this paper. With the graft scheme, the typical PWM switch-mode converters, such as buck-boost, boost-buck (Cuk), Sepic, and dual Sepic, can be generated from the two basic converters, buck and boost. The small signal models of these converters can, therefore, be derived by properly combining those of the buck and boost. Using the proposed approach can help to yield highly related dynamic models of the converters in a family and, in addition, physical insights into the converters can be readily identified. This has made the proposed modeling method valuable and viable

Keywords

DC-DC power convertors; PWM power convertors; Cuk converters; PWM DC/DC converters modeling; PWM switch-mode converters; Sepic converters; boost-buck converters; buck-boost converters; dual Sepic converters; dynamic models; graft scheme; small signal models; DC-DC power converters; Equivalent circuits; Flow graphs; Mathematical model; Power system modeling; Pulse width modulation; Pulse width modulation converters; Switches; Switching circuits; Switching converters;

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/41.661309

Filename

661309