Stability analysis of multiple-output DC-DC converters with cross and precise regulations

Author

Nojiri, Yoshihiro ; Ohyama, Ichiro ; Negome, Taketo ; Zaitsu, Toshiyuki ; Ninomiya, Tamotsu ; Shoyama, Masahito

Author_Institution

Graduate Sch. of Eng. Sci., Kyushu Univ., Fukuoka, Japan

Volume

1

fYear

1998

fDate

17-22 May 1998

Firstpage

374

Abstract

A multiple-output DC-DC power converter using cross-regulation enables a reduction in size, weight and cost. However, the effect of the smoothing capacitances on the power converter stability has not been discussed enough. Besides, the input circuit is usually required to be isolated from the output side, and the combination of a photo-coupler and a shunt-regulator is often used. However, these components have phase delay and deteriorate the power converter stability. This paper analyzes the stability of three kinds of multiple-output DC-DC power converters using the cross regulation. In the analysis, the transfer function of the photo-coupler and shunt-regulator is estimated from the measured data. Finally, the relationship between the stability boundaries of the power converters and the smoothing capacitances is focused for the size reduction

Keywords

DC-DC power convertors; circuit stability; equivalent circuits; transfer function matrices; cross-regulation; multiple-output DC-DC power converter; phase delay; photo-coupler; shunt-regulator; size reduction; smoothing capacitance; stability analysis; stability boundaries; transfer function; Adaptive control; Capacitance; Circuit stability; Costs; Coupling circuits; DC-DC power converters; Delay; Size control; Smoothing methods; Stability analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialists Conference, 1998. PESC 98 Record. 29th Annual IEEE

Conference_Location

Fukuoka

ISSN

0275-9306

Print_ISBN

0-7803-4489-8

Type

conf

DOI

10.1109/PESC.1998.701926

Filename

701926