Title :
Star connected autotransformer based 30-pulse AC-DC converter for power quality improvement in vector controlled induction motor drives
Author :
Singh, Bhim ; Bhuvaneswari, G. ; Garg, Vipin ; Chandra, Ambrish
Author_Institution :
Dept. of Electr. Eng., IIT Delhi, New Delhi
Abstract :
This paper presents the design and analysis of an autotransformer based 30-pulse AC-DC converter feeding vector controlled induction motor drives. The proposed AC-DC converter is based on a star connected autotransformer, designed for producing 15-phase shifted AC voltages for effective harmonic reduction. The proposed 30-pulse AC-DC converter is suitable for retrofit applications, where, presently a six-pulse diode bridge rectifier is being used. The resulting supply current is near sinusoidal in shape with low total harmonic distortion (THD) of supply current and a nearly unity power factor. The effect of load variation on various power quality indices is also presented. The proposed AC-DC converter is found suitable for applications with large load variation and where harmonic reduction is stringent
Keywords :
AC-DC power convertors; autotransformers; diodes; harmonic distortion; harmonics suppression; induction motor drives; machine vector control; power conversion harmonics; power factor; power supply quality; rectifying circuits; 30-pulse AC-DC converter; harmonic reduction; induction motor drive; power quality improvement; six-pulse diode bridge rectifier; star connected autotransformer; total harmonic distortion; unity power factor; vector control; AC-DC power converters; Bridge circuits; Current supplies; Diodes; Induction motor drives; Load management; Power quality; Rectifiers; Shape; Voltage;
Conference_Titel :
Power India Conference, 2006 IEEE
Conference_Location :
New Delhi
Print_ISBN :
0-7803-9525-5
DOI :
10.1109/POWERI.2006.1632483
