Control scheme and transient performance of Sigma VR

Author

Lai, Pengjie ; Sun, Julu ; Lee, Fred C.

Author_Institution

Bradley Dept. of Electr. & Comput. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA

fYear

2010

fDate

21-25 Feb. 2010

Firstpage

1927

Lastpage

1933

Abstract

Sigma Voltage Regulator (VR) was proposed for achieving high efficiency. It takes advantage of the high efficiency unregulated converter to improve the overall efficiency and combines a low power Buck converter for voltage regulation. This paper mainly discusses the control scheme and transient performance of Sigma VR. The small-signal-model is analyzed first. Then the control strategy and the detailed control design of Sigma VR to achieve constant output impedance for AVP and transient are given. At the end, the simulation and experimental result demonstrates that Sigma VR can achieve very good transient performance with less output bulk capacitors compared with that of conventional Buck VR.

Keywords

power convertors; voltage control; voltage regulators; low power buck converter; sigma VR; sigma voltage regulator; transient performance; voltage regulation; Bandwidth; Buck converters; Control systems; Microprocessors; Regulators; Sun; Switching frequency; Transient analysis; Virtual reality; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition (APEC), 2010 Twenty-Fifth Annual IEEE

Conference_Location

Palm Springs, CA

ISSN

1048-2334

Print_ISBN

978-1-4244-4782-4

Electronic_ISBN

1048-2334

Type

conf

DOI

10.1109/APEC.2010.5433498

Filename

5433498