Digital gain-scheduled control of a high frequency parallel resonant DC-DC converter

Author

Vulovic, Marko ; Boroyevich, Dushan ; Mattavelli, Paolo

Author_Institution

Syst. Products Div. R&D, Agilent Technol., Budd Lake, NJ, USA

fYear

2012

fDate

5-9 Feb. 2012

Firstpage

1814

Lastpage

1820

Abstract

The nonresonant-coupled parallel resonant converter is discussed and a reference classical analog controller is designed and simulated. Based on the strong relationship observed between low-frequency converter gain and operating point, a band-limited gain-scheduled digital controller is proposed, designed, and simulated, showing 5:1 improved worst-case control bandwidth as compared with the analog controller. A prototype is designed and built which experimentally validates the simulation results with good correlation. The effect of digital modulator resolution is discussed.

Keywords

DC-DC power convertors; digital control; gain control; modulators; resonant power convertors; band limited gain scheduled digital controller; digital gain scheduled control; digital modulator resolution; high frequency parallel resonant DC-DC converter; low frequency converter gain; nonresonant coupled parallel resonant converter; reference classical analog controller; worst case control bandwidth; Control systems; Frequency control; Gain; Prototypes; Rectifiers; Stability analysis; Transfer functions;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition (APEC), 2012 Twenty-Seventh Annual IEEE

Conference_Location

Orlando, FL

Print_ISBN

978-1-4577-1215-9

Electronic_ISBN

978-1-4577-1214-2

Type

conf

DOI

10.1109/APEC.2012.6166068

Filename

6166068