Title :
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
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;
Conference_Titel :
Power Electronics Specialists Conference, 1993. PESC '93 Record., 24th Annual IEEE
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-1243-0
DOI :
10.1109/PESC.1993.471913
