@article {10.3844/ajassp.2008.1580.1587,
article_type = {journal},
title = {Harmonics Phase Shifter for a Three-Phase System with Voltage Control by Integral-Cycle Triggering Mode of Thyristors },
author = {Badran, I. and Mahmood, A.L. and Lazim, M.T.},
volume = {5},
year = {2008},
month = {Nov},
pages = {1580-1587},
doi = {10.3844/ajassp.2008.1580.1587},
url = {https://thescipub.com/abstract/ajassp.2008.1580.1587},
abstract = {In integral-cycle triggering mode of voltage control, subharmonic as well as higher order harmonic components are generated in the load voltage waveforms of a three-phase system. These harmonic components are found to be unbalanced in phase displacement. The correction of the unbalanced phase displacement angles of a particular subharmonic or higher order harmonic for this type of triggering is investigated to solve the limitation of use of this important type of control as a drive and many other industrial applications. In this research a new phase shifting technique is proposed to correct the unbalanced phase displacement angles in the three-phase system. This technique depends on shifting the waveforms of either phase B or phase C or both by multiples of 2π. A microprocessor-based harmonic phase shifter is designed and tested with three-phase resistive and induction motor loads. It is found that there is a well agreement between the theoretical and experimental results and it is believed that the major problem of harmonics phase unbalances associated with the integral-cycle triggering mode of thyristors when used with three-phase circuits have been solved in the present research.},
journal = {American Journal of Applied Sciences},
publisher = {Science Publications}
}