New voltage mode control method for the quasi-Z-source-based isolated DC/DC converters

Author

Roasto, Indrek ; Vinnikov, Dmitri

Author_Institution

Dept. of Electr. Drives & Power Electron., Tallinn Univ. of Technol., Tallinn, Estonia

fYear

2012

fDate

19-21 March 2012

Firstpage

644

Lastpage

649

Abstract

A new voltage mode control method for the quasi-Z-source isolated DC/DC converter is proposed and analyzed. Conventional control methods for Z-source or quasi-Z-source converters are based on the DC-link voltage regulation, which indirectly also influences the output. The proposed control method measures the output voltage directly and therefore better response to load changes can be expected. Small-signal AC models of the converter are derived and appropriate transfer functions found. Benefits and drawbacks of the proposed control method are analyzed on the basis of mathematical and simulation models. Simulation results are verified with experimental results. Tests were carried out on a 2 kW experimental prototype.

Keywords

DC-DC power convertors; voltage control; DC-link voltage regulation; isolated DC/DC converters; power 2 kW; quasi-Z-source converters; small-signal AC models; voltage mode control method; Laboratories; Pulse width modulation; Switches; AC analysis; DC-DC converter; Immittance converters; voltage mode control;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Technology (ICIT), 2012 IEEE International Conference on

Conference_Location

Athens

Print_ISBN

978-1-4673-0340-8

Type

conf

DOI

10.1109/ICIT.2012.6210011

Filename

6210011