Delta-Polygon Autotransformer Based 24-Pulse Rectifier for Switching Mode Power Supply
Abstract: In medium and high
power capacity switching mode power supply (SMPS), power quality at the AC side
is often severely distorted. In this paper, a small magnetic rating
delta-polygon autotransformer based 24-pulse rectifier feeding SMPS is
designed, constructed, and simulated for harmonic mitigation. Various
auto-wound transformers for the 24-pulse AC-DC converter are discussed and
compared in terms of magnetic rating and power quality indices, in order that
the optimal autotransformer structure can be chosen. The effect of load
variation on the proposed 24-pulse rectifier is also analyzed. Moreover,
performance of the 6-, 12-, and 18-pulse rectifiers based on delta-polygon
autotransformer are studied through comparison. Results demonstrate that the
total harmonic distortion of utility current is lower than 6.10% and unity
power factor is achieved under varying load.
Author: Chun-ling Hao,
Xiao-qiang Chen, Hao Qiu
Journal Code: jptkomputergg160200
