Title :
Compensation Method for Phase Distortion of Output Voltage in the Three-phase Triport UPS System
Author :
Harada, K. ; Katsuki, A. ; Mbouenda, M. ; Tominaga, F.
Author_Institution :
Kyushu University.
Abstract :
A new three-phase constant-voltage transformer is described. In this circuit, load unbalance and input voltage asymmetry can in principle be removed by ring-connected compensation windings. When the, triac of an Automatic Voltage Regulator (AVR) is controlled to give a constant output voltage, phase differences between the output voltages are kept at 120°. This principle can also be applied to conventional three-phase constant-voltage transformers with magnetic shunts and to three-phase Triport UPS systems.
Keywords :
Automatic voltage control; Circuits; Inductors; Magnetics; Phase distortion; Regulators; Thyristors; Transformers; Uninterruptible power systems; Voltage control;
Journal_Title :
Magnetics in Japan, IEEE Translation Journal on
DOI :
10.1109/TJMJ.1990.4564314
