New control scheme for AC-DC-AC converter without DC link electrolytic capacitor

Author

Kim, Joohn Sheok ; Sul, Seung K.

Author_Institution

Dept. of Electr. Eng., Seoul Nat. Univ., South Korea

fYear

1993

fDate

20-24 Jun 1993

Firstpage

300

Lastpage

306

Abstract

A novel concept for a static three-phase to three-phase power converter for an AC motor drive with unity power factor and reduced harmonics on the utility line is presented. The power circuit consists of two back-to-back connected six-pulse bridges having only a 5-μF ceramic capacitor in the DC link. By controlling the active power balance between two bridges, the DC link voltage can be maintained within a 20-V deviation from the nominal value with the small ceramic capacitor regardless of the load variation

Keywords

AC motor drives; AC-AC power convertors; AC-DC power convertors; DC-AC power convertors; bridge circuits; power factor; power system harmonics; voltage control; 5 muF; AC motor drive; AC/DC/AC power convertor; DC link voltage; active power balance; back-to-back circuits; harmonics; six-pulse bridges; small ceramic capacitor; three-phase; unity power factor; voltage regulation; AC motors; Analog-digital conversion; Bridge circuits; Capacitors; Ceramics; Load management; Power system harmonics; Reactive power; Static power converters; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialists Conference, 1993. PESC '93 Record., 24th Annual IEEE

Conference_Location

Seattle, WA

Print_ISBN

0-7803-1243-0

Type

conf

DOI

10.1109/PESC.1993.471913

Filename

471913