Development of open-loop and closed-loop techniques for the optimization of modular multilevel conversion structures

Author

Leskovar, S. ; Marchesoni, M. ; Mazzucchelli, M.

Author_Institution

Dipt. di Ingegneria Elettrica, Universita degli Studi di Genova

fYear

2006

fDate

23-26 May 2006

Firstpage

577

Lastpage

582

Abstract

New control and modulation techniques are proposed for the reduction of the DC-link capacitors in cascade multilevel converter structures for medium-voltage AC motor drives. Two different approaches have been followed, the first one based on the synthesis of suitable modulating signals, and the second one based on the feedback of the motor currents and of the DC-link voltage in each H-bridge module. A new DC-link passive filtering approach is also proposed, which has been studied and optimized with reference to such techniques. The explanation of the proposed techniques and the most significant analyses and results are reported

Keywords

AC motor drives; bridge circuits; cascade networks; closed loop systems; feedback; open loop systems; passive filters; power capacitors; power filters; DC-link capacitors; DC-link passive filtering approach; H-bridge module; cascade multilevel converter structures; closed-loop techniques; medium-voltage AC motor drives; modular multilevel conversion optimization; open-loop techniques; AC motors; Capacitance; Frequency; Insulated gate bipolar transistors; Passive filters; Power semiconductor devices; Power system harmonics; Power transformer insulation; Pulse width modulation; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics, Electrical Drives, Automation and Motion, 2006. SPEEDAM 2006. International Symposium on

Conference_Location

Taormina

Print_ISBN

1-4244-0193-3

Type

conf

DOI

10.1109/SPEEDAM.2006.1649838

Filename

1649838